Updated July 31, 2026: Heat pump installation requirements vary by equipment, building type, jurisdiction and project scope. Equipment specifications, permit requirements and incentive rules can also change. The final installation should follow current manufacturer instructions, applicable codes and the requirements of the authority having jurisdiction.
A high-quality heat pump can still produce poor comfort, unnecessary energy use, noise, icing or early equipment problems when the system is poorly designed or installed. The most important installation mistakes often happen before the equipment is switched on: incorrect sizing, inadequate duct assessment, poor zone design, weak electrical planning, inappropriate equipment placement and incomplete commissioning.
Good installation starts with the home. The contractor should understand the heating and cooling loads, existing distribution system, room layout, electrical capacity, winter performance requirements and backup-heating strategy before selecting the final equipment.
This guide explains 20 heat pump installation mistakes BC homeowners should watch for before accepting a proposal or completed project.
What Are the Biggest Heat Pump Installation Mistakes?
The most serious mistakes are not usually cosmetic.
They affect whether the heat pump can heat, cool and operate reliably in the actual building.
Major Problems Include:
- Incorrect sizing
- Ignoring low-temperature performance
- Restrictive ductwork
- Poor indoor-unit coverage
- Blocked outdoor airflow
- Improper drainage
- Poor refrigerant piping and commissioning
- Incorrect electrical design
- Improper backup heat
- Control configuration errors
The Equipment Brand Cannot Compensate for Poor Design
A premium system can still perform badly if:
- It is too large for the home.
- The ducts cannot move enough air.
- The indoor units do not serve the occupied rooms.
- The outdoor unit recirculates its own discharge air.
- The refrigeration circuit is not commissioned correctly.
Start with system design, then choose equipment.
1. Skipping the Heat-Load Calculation
Correct equipment selection starts with determining how much heating and cooling the home actually requires.
A Load Calculation Considers Factors Such As:
- Outdoor design conditions
- Home size and geometry
- Insulation
- Windows and doors
- Air leakage
- Foundation and basement
- Ceiling and roof
Current BC Retrofit Best Practice Uses CSA F280-Based Load Calculation
A recognized calculation is substantially more useful than guessing equipment size from floor area.
Why It Matters
An undersized system can:
- Lose comfort during peak conditions
- Depend excessively on supplementary heat
- Increase operating cost
An oversized system can:
- Cycle excessively
- Provide unstable comfort
- Operate poorly during mild weather
2. Sizing From Square Footage or the Old Furnace
Rules such as “one ton per X square feet” ignore too much of the building.
Two 2,000-Square-Foot Homes Can Have Very Different Loads
Differences can include:
- Insulation level
- Window area
- Orientation
- Air leakage
- Ceiling height
- Basement condition
The Old Furnace Is Not a Load Calculation
Existing heating equipment may have been oversized from the day it was installed.
The Home May Also Have Changed
Since the original furnace was installed, the homeowner may have completed:
- Insulation
- Air sealing
- Window replacement
- Additions
- Basement renovation
Size the New System for the Current Building
Not for the label on equipment being removed.
3. Ignoring Cold-Weather Heating Capacity
Nominal tonnage does not tell you how much heating capacity a heat pump provides during colder weather.
Heat Pump Capacity Changes With Outdoor Temperature
Compare the proposed equipment’s published output with the home’s heating load at relevant winter conditions.
Two Systems With the Same Nominal Size Can Have Different Winter Performance
Ask about:
- Heating capacity at relevant cold temperatures
- Capacity maintenance
- Cold-weather COP where available
- Operating range
Do Not Design From Marketing Labels Alone
Terms such as:
- Cold climate
- Hyper heat
- Extreme heating
should be supported by performance data for the exact system.
Backup Heat Should Cover an Intentional Design Gap
Not a gap discovered during the first cold spell.
4. Ignoring Minimum Capacity and Oversizing
Maximum capacity matters during cold weather.
Minimum capacity matters during mild weather.
Variable-Speed Heat Pumps Cannot Modulate to Zero
Every system has a minimum available output.
When Minimum Output Is Too Large
The heat pump can:
- Cycle on and off
- Create temperature swings
- Operate less quietly
- Reduce cooling moisture control
This Is Especially Important For:
- Small homes
- Condos
- Well-insulated houses
- Small bedrooms
- Multi-zone systems
Do Not Buy Extra Capacity Merely for Reassurance
A system should be selected from the load, performance curve and backup-heating strategy.
5. Assuming Existing Ducts Are Suitable
A central heat pump is connected to an air-distribution system, and the condition of that system matters.
Existing Duct Problems Can Include:
- Undersized supply trunks
- Insufficient return air
- Restrictive filters
- Damaged ductwork
- Poor fittings
- High external static pressure
- Unbalanced rooms
Measure Instead of Guessing
Professional evaluation can include:
- Duct dimensions
- External static pressure
- Airflow
- Blower performance
A Larger Heat Pump Can Make a Duct Problem Worse
If more airflow is forced through restrictive ductwork, possible results include:
- Noise
- Reduced airflow
- Higher blower energy
- Equipment protection faults
Fix Distribution Where Required
Possible improvements include:
- Return-air upgrades
- Better transitions
- Duct sealing
- Balancing
- Alternative mixed-system design
6. Poor Ductless Zone Coverage
Matching total equipment Btu/h to total house load does not prove the ductless design serves every room.
Air Needs a Path
A wall-mounted head in an open living room does not automatically heat:
- Closed bedrooms
- Basement rooms
- Rooms around corners
- Another floor
Room-by-Room Loads Can Help
Determine what each zone requires before choosing:
- Number of indoor units
- Indoor-unit capacity
- Concealed duct systems
- Retained supplementary heaters
Do Not Oversize One Head to Solve a Distribution Problem
More capacity in one room does not solve a lack of airflow to separated rooms.
7. Choosing Poor Indoor-Unit Locations
Ductless indoor-unit placement affects comfort, airflow, drainage, maintenance and appearance.
Avoid Locations That:
- Blow continuously onto a bed
- Blow directly onto a sofa or desk
- Are obstructed by tall furniture
- Have poor room air circulation
- Make filter access difficult
Think About Both Heating and Cooling
The same indoor unit needs to distribute:
- Warm air during winter
- Cool air during summer
Condensate Routing Also Matters
A location that looks ideal from the room can be poor if it requires an unnecessarily difficult drainage route.
Service Access Matters
Filters, blower components, controls and drain systems eventually need access.
8. Choosing a Poor Outdoor-Unit Location
Outdoor equipment needs unrestricted airflow and reasonable service access.
Avoid Locations With:
- Tight enclosures
- Blocked intake or discharge airflow
- Heavy roof runoff
- Persistent debris
- Insufficient service clearance
- High risk of physical impact
Consider Sound
Think about nearby:
- Bedroom windows
- Neighbouring patios
- Property lines
- Reflective walls
Consider Vibration
Wall brackets and structural mounting should account for vibration transfer into occupied rooms.
Do Not Hide the Heat Pump for Appearance at the Expense of Airflow
Outdoor equipment needs the clearances and airflow required by the manufacturer.
9. Forgetting Defrost Water and Winter Drainage
Air-source heat pumps create water during normal winter defrost.
That Water Needs Somewhere Safe to Go
Avoid directing it toward:
- Walkways
- Stairs
- Doorways
- Neighbouring property
- Areas where ice can accumulate around the equipment
Outdoor Unit Elevation Can Matter
The installation should account for:
- Local conditions
- Drainage
- Snow accumulation where relevant
- Manufacturer mounting requirements
Do Not Confuse Defrost Water With a Refrigerant Leak
Water from a normally defrosting outdoor coil is expected.
Plan Winter Behaviour During Summer Installation
Winter drainage should be considered even when installation happens during warm weather.
10. Poor Refrigerant Line-Set Routing
Refrigerant piping connects indoor and outdoor components and should be treated as a permanent mechanical system.
Good Routing Considers:
- Manufacturer pipe-size requirements
- Allowable length
- Vertical separation
- Support
- Vibration
- Protection from physical damage
- Insulation
- Service access
Avoid Unnecessary Length and Tight Routing
Good planning can reduce:
- Visual clutter
- Pressure-drop concerns
- Additional refrigerant requirements
- Damage risk
Protect Exterior Piping
Line-cover systems can protect:
- Refrigerant piping
- Insulation
- Control wiring
- Drain lines
Do Not Allow Tubing to Rub Against Sharp Surfaces
Long-term vibration can damage poorly supported piping.
11. Poor Wall and Building-Envelope Penetrations
Heat pump installations can penetrate walls for:
- Refrigerant lines
- Drain piping
- Electrical conduit
- Control wiring
A Hole Through the Wall Is Also a Building-Envelope Detail
The installation should preserve appropriate:
- Water control
- Air control
- Thermal insulation
- Vapour control
Poor Penetrations Can Cause:
- Water leaks
- Air leakage
- Damage to finishes
- Envelope deterioration
Multi-Unit Buildings Require Extra Care
The wall may also involve:
- Common property
- Fire separation
- Rain-screen assembly
- Strata approval
Plan the Penetration Before Drilling
The routing and sealing approach should be established before work begins.
12. Poor Condensate Drainage
Indoor heat pump coils produce condensate during cooling.
Possible Drainage Methods Include:
- Gravity drain
- Condensate pump
- Approved connection to appropriate drainage
Drainage Problems Can Cause:
- Water leakage
- Ceiling or wall damage
- Indoor-unit shutdown
- Odour
- Overflow
Gravity Drains Need Proper Routing
The drain should avoid:
- Upward traps caused by poor routing
- Crushed hose
- Unsafe discharge points
Condensate Pumps Need Maintenance Access
The homeowner should know:
- Where the pump is located
- Whether it has an alarm or safety function
- What maintenance it needs
13. Guessing at Electrical Capacity
Heat pump electrical design should be based on the proposed equipment and the home’s electrical system.
Check Loads From:
- Outdoor unit
- Air handler
- Ductless indoor equipment where applicable
- Electric resistance backup
- Existing household loads
Panel Space Is Not the Same as Service Capacity
An empty breaker position does not prove the electrical service has enough capacity for the additional load.
Do Not Assume Every House Needs 200-Amp Service
An electrical load assessment should determine what the home actually needs.
Do Not Assume an Old AC Circuit Is Automatically Suitable
The new heat pump’s electrical requirements need to match:
- Conductor size
- Breaker or overcurrent protection
- Disconnect
- Voltage
Plan Electrical Work Before Installation Day
The electrical scope should be confirmed before equipment installation begins.
14. Oversizing or Poorly Controlling Backup Heat
Supplementary heat is part of the system design.
Possible Backup Sources Include:
- Electric resistance heat
- Gas furnace
- Retained room heating in defined applications
Electric Resistance Backup Can Create a Large Electrical Load
Oversizing it can affect:
- Electrical-service requirements
- Equipment cost
- Operating cost
Controls Matter Too
A correctly sized electric heater can still create unnecessary energy use if controls call for it too aggressively.
Dual-Fuel Systems Need an Intentional Changeover Strategy
The design should define how heat pump and furnace heating are coordinated.
Do Not Treat Backup Heat as a Substitute for Heat Pump Sizing
The primary system should be selected according to the actual design objectives.
15. Incorrect Thermostat or Control Setup
A properly installed mechanical system can still operate badly when controls are configured incorrectly.
Possible Problems Include:
- Wrong equipment type selected
- Incorrect number of stages
- Improper auxiliary heat settings
- Incorrect dual-fuel logic
- Incompatible thermostat
- Sensor configuration errors
Communicating Systems Can Require Manufacturer-Specific Controls
Replacing them with a generic thermostat can sometimes alter available:
- Modulation
- Diagnostics
- Control functions
Ductless Systems Need Proper Mode Education
In a multi-zone system, conflicting Heat and Cool requests can create unexpected behaviour depending on equipment design.
Control Setup Is Part of Commissioning
Controls should be reviewed for the actual installed equipment rather than left unverified at default settings.
16. Poor Refrigeration-System Workmanship
Heat pump performance depends on the integrity and condition of the sealed refrigeration circuit.
Professional Installation Can Include:
- Correct piping and fittings
- Proper joint preparation
- Leak testing
- Evacuation
- Manufacturer-required charge adjustment
- Operating verification
ENERGY STAR Identifies Correct Refrigerant Charge as a Quality-Installation Issue
Both improper charge and other refrigeration-system problems can reduce performance and contribute to equipment problems.
Do Not Assume Factory Charge Is Correct for Every Installed Line Length
Follow the manufacturer procedure for the exact equipment and piping configuration.
Do Not Use Refrigerant as a Troubleshooting Shortcut
If post-installation performance is poor, first evaluate the complete system, including:
- Airflow
- Controls
- Fans
- Load
- Refrigeration operation
17. Installing the Wrong Equipment Combination
A heat pump is a matched system, not only an outdoor condenser.
The Complete Combination Can Include:
- Outdoor unit
- Indoor air handler
- Indoor coil
- Ductless indoor units
- Furnace where applicable
- Controls
Performance Depends on the Match
Changing the indoor unit can affect:
- Capacity
- Efficiency
- Controls
- Certification
AHRI Reference Can Matter
For applicable systems, the AHRI certified reference identifies the tested component combination.
Current BC Rebate Programs Also Use Exact Equipment Eligibility
A qualifying brand does not mean every system combination from that brand qualifies.
Verify Before Ordering
Record:
- Outdoor model
- Indoor model or models
- Air handler or furnace
- AHRI reference where applicable
18. Skipping Permits, Qualifications or Property Approval
Heat pump installations involve regulated technical work.
Current Technical Safety BC Guidance
Residential heat pumps are regulated electrical equipment in British Columbia.
In most cases, installation or upgrade requires:
- An electrical permit
- Regulated electrical work by appropriately qualified personnel
Gas Equipment Adds Additional Requirements
If a natural gas furnace or boiler is removed or modified, applicable gas work and permits need to be addressed.
Refrigeration Requirements Can Also Apply
The regulatory scope can depend on:
- Equipment capacity
- Building type
- Refrigerant characteristics
Strata Approval Is Separate
In a condo or townhouse, installation may require approval for:
- Exterior equipment
- Wall penetrations
- Balconies
- Common or limited common property
Plan Permits and Approvals Before Work Begins
Required approvals and permits should be part of project planning rather than deferred until after installation starts.
19. Accepting an Unclear Installation Scope
A vague quote creates space for disputes and unexpected costs.
The Proposal Should Identify:
- Exact equipment
- System configuration
- Indoor-unit locations
- Outdoor-unit location
- Duct modifications
- Electrical work
- Line-set routing
- Condensate work
- Controls
- Backup heating
- Permits
- Removal of existing equipment
- Commissioning
Read the Exclusions
Potential exclusions can include:
- Drywall repair
- Painting
- Hazardous-material remediation
- Structural work
- Electrical service upgrades
- Strata engineering
Do Not Compare Quote Totals Until You Compare Scope
Two contractors can quote the same outdoor heat pump and still be proposing very different projects.
20. Skipping Commissioning and Homeowner Handover
The installation is not complete simply because the equipment turns on.
Commissioning Should Verify That the Installed System Actually Operates as Intended
Depending on equipment type, this can include:
- Heating operation
- Cooling operation
- Airflow
- External static pressure
- Fan operation
- Controls
- Supplementary heat
- Refrigeration operation
- Condensate drainage
- Fault codes
ENERGY STAR Quality-Installation Guidance Emphasizes Verification
Proper sizing, airflow and refrigerant charge all affect comfort, efficiency and equipment reliability.
The Homeowner Also Needs Training
Explain:
- Heat mode
- Cool mode
- Fan settings
- AUX Heat
- Emergency Heat where applicable
- Defrost
- Filter maintenance
- Fault reporting
Keep Documentation
Retain:
- Model numbers
- Serial numbers
- Warranty registration
- Final invoice
- Permits
- Commissioning information
Common Central Ducted Heat Pump Installation Mistakes
Ignoring Static Pressure
The new air handler needs to move the required airflow through the installed duct system.
Insufficient Return Air
A large supply system with a restrictive return side still creates airflow problems.
Incorrect Blower Setup
Variable-speed air handlers still require appropriate commissioning and configuration.
Excessive Filter Restriction
A higher filtration rating is not useful when the installed filter arrangement creates excessive pressure drop.
Failing to Balance Rooms
The system may meet total airflow while:
- One bedroom overheats
- Another receives inadequate air
Installing a New Heat Pump Without Addressing Old Duct Problems
The equipment replacement does not repair distribution deficiencies by itself.
Common Ductless Heat Pump Installation Mistakes
One Head for Too Many Rooms
Capacity is not the same as distribution.
Indoor Unit Too Close to the Ceiling or Obstruction
Follow manufacturer clearances and airflow requirements.
Head Positioned for Appearance Only
Comfort, drainage and service access also matter.
Poor Exterior Line-Cover Layout
Plan piping before mounting indoor equipment.
Unnecessary Condensate Pump
Where a reliable gravity drain is possible, it can avoid adding another mechanical component requiring service.
Poor Wall Penetration
Weather sealing and building-envelope continuity matter.
Common Multi-Zone Heat Pump Installation Mistakes
Oversizing Every Indoor Head
Individual room loads can be much smaller than the smallest commonly marketed head size.
Ignoring Outdoor Minimum Capacity
A multi-zone condenser still needs to operate sensibly when only one small room calls.
Using Nominal Indoor Capacity as Room Load
A 9,000 Btu/h indoor unit does not prove the bedroom requires 9,000 Btu/h.
Failing to Consider Mode Conflicts
Many conventional multi-zone systems cannot provide heating in one room and cooling in another simultaneously.
Poor Refrigerant Branch Planning
Multi-zone systems can have:
- More piping
- More connections
- More routing complexity
than a single-zone system.
Using Multi-Zone Only to Minimize Outdoor Units
Exterior appearance is one design factor, not the entire mechanical design.
Common Dual-Fuel Heat Pump Installation Mistakes
Assuming Any Furnace Can Be Retained
Check:
- Furnace condition
- Blower capability
- Indoor coil compatibility
- Controls
No Defined Changeover Strategy
Heat pump and furnace operation should be coordinated intentionally.
Incorrect Thermostat Configuration
Controls need to understand that the system uses two heating sources.
Ignoring Duct Airflow
Both furnace and heat pump operating modes must work with the same distribution system.
No Commissioning of Both Heat Sources
Test:
- Heat pump heating
- Furnace heating
- Transition logic
Common Full-Electric Heat Pump Installation Mistakes
Oversized Resistance Backup
This can create unnecessary electrical-service demand.
Undersized Backup Without Reviewing Peak Load
The complete system still needs to meet the intended heating design.
Backup Heat Called Too Early
Control setup can undermine heat pump efficiency if resistance heating is used unnecessarily.
No Electrical Load Assessment
Full-electric conversion should coordinate:
- Compressor load
- Indoor equipment
- Backup heat
- Other household electrical loads
Assuming 200-Amp Service Is Always Necessary
Use an actual electrical assessment rather than a universal rule.
Common Condo and Townhouse Heat Pump Installation Mistakes
Ordering Equipment Before Strata Approval
A rejected outdoor-unit location can change the entire project.
Ignoring Common Property
Exterior walls, balconies and other components may not belong solely to the unit owner.
Ignoring Vibration
Structure-borne vibration can become a neighbour problem.
Poor Defrost-Water Planning
Do not drain winter water toward:
- Lower balconies
- Common walkways
- Neighbouring property
Poor Penetration Detailing
Multi-unit exterior assemblies can require careful water, air and fire-related detailing.
Installing Before Incentive Pre-Approval
Current condo and apartment rebate pathways can require program steps before installation.
Heat Pump Installation Quote Checklist
| Item | What Should Be Clear |
|---|---|
| Load calculation | How heating and cooling requirements were determined |
| Outdoor model | Exact model number |
| Indoor equipment | Exact air handler, coil or indoor-unit models |
| Cold-weather performance | Capacity at relevant winter conditions |
| AHRI match | Applicable certified system combination |
| Ductwork | Existing condition and required modifications |
| Zone coverage | How intended rooms receive heating and cooling |
| Outdoor location | Mounting, clearances, sound and drainage |
| Refrigerant piping | Routing, protection and installation scope |
| Condensate | Drainage route and pump where applicable |
| Electrical | Circuits, disconnects, panel or service changes |
| Backup heat | Type, capacity and controls |
| Thermostat | Exact controls and configuration |
| Permits | Required permits and responsible contractor |
| Existing equipment | Removal, retention or decommissioning |
| Commissioning | What will be checked or measured |
| Warranty | Parts, compressor and labour coverage |
| Exclusions | Work not included in the contract price |
What Should Heat Pump Commissioning Include?
The exact procedure depends on the system and manufacturer.
General Verification Can Include:
- Correct equipment models
- Heating operation
- Cooling operation
- Thermostat and controller configuration
- Indoor and outdoor fan operation
- Airflow
- Static pressure where applicable
- Backup heat
- Condensate drainage
- Refrigeration-system operation
- Fault history
For Ducted Systems
Do not assume the factory blower setting is automatically correct for the installed ductwork.
For Multi-Zone Systems
Test every indoor unit rather than checking only the closest head.
For Dual Fuel
Verify both heating sources and the intended control strategy.
For Full Electric
Verify supplementary heat and control staging.
Documentation Matters
The homeowner should leave installation day understanding how the system operates and what normal behaviour looks like.
Heat Pump Installation Planning in Metro Vancouver and Fraser Valley
Bernoulli Heating and Cooling provides free estimates for new heat pump installation and replacement projects across Metro Vancouver and Fraser Valley.
Installation planning can consider heat-load calculations, equipment performance, duct or zone design, electrical requirements, indoor and outdoor equipment placement, backup heating, drainage, controls and commissioning before the final system is selected.
New heat pump installation and replacement estimates are free.
For troubleshooting an existing heat pump, the current diagnostic appointment charge is $135. Repair labour, replacement parts, refrigerant and additional materials are separate.
Call 604-518-4438 or email heatingbernoulli@gmail.com.
For local installation planning:
Heat Pump Installation Mistakes: Frequently Asked Questions
What is the biggest heat pump installation mistake?
Skipping proper system design is one of the biggest mistakes. Correct sizing, distribution, equipment selection and electrical planning should happen before installation begins.
Can a heat pump be installed incorrectly even if it works?
Yes. A system can turn on while still having incorrect sizing, airflow, controls, drainage, refrigerant setup or distribution.
Can poor installation increase electricity use?
Yes. Airflow problems, excessive backup heat, improper controls and poor equipment sizing can all increase energy consumption.
Can poor installation shorten heat pump life?
Abnormal airflow, refrigeration conditions, excessive cycling and electrical problems can place unnecessary stress on components.
Should my installer calculate the heating load?
Yes for whole-home system design. Current BC retrofit best-practice guidance uses recognized load-calculation methods rather than simple rules of thumb.
Is square footage enough to size a heat pump?
No. Insulation, windows, air leakage, construction and local climate also affect heating and cooling loads.
Can I size a heat pump from my old furnace?
No. The existing furnace may be oversized and the building may have changed since it was installed.
Can I size the new heat pump from the old air conditioner?
Not automatically. Heating requirements must also be evaluated.
Is oversizing safer than undersizing?
No. Both can create problems. Oversizing can contribute to cycling and poor part-load performance.
Can an oversized variable-speed heat pump still short cycle?
Yes. Variable-speed systems still have a minimum operating capacity.
Why does minimum capacity matter?
It determines how low the system can reduce output when the home needs only a small amount of heating or cooling.
Should I compare heat pump capacity at cold temperatures?
Yes for heating-focused projects. Nominal capacity alone does not describe winter performance.
Does cold-climate branding prove the system is large enough?
No. The equipment’s actual capacity must still be compared with the home’s heating load.
Can an installer reuse my existing ducts?
Possibly, after evaluating airflow, static pressure, return capacity and duct condition.
Should static pressure be checked?
It is an important diagnostic and commissioning measurement for many central ducted retrofits.
Can small ducts make a heat pump noisy?
Yes. High airflow through restrictive ductwork can increase air noise and static pressure.
Can the blower simply be set faster?
Not always. More blower speed through restrictive ducts can increase pressure without providing appropriate distribution.
Can poor return air reduce heat pump performance?
Yes. Supply and return airflow both matter.
Can a restrictive filter cause installation problems?
Yes when the filter arrangement creates excessive pressure drop for the installed blower and duct system.
Can one mini-split heat an entire house?
Sometimes in a small, open layout. Closed rooms and multiple floors need specific distribution planning.
Can one large indoor head replace several smaller zones?
Not when room separation prevents air movement. Capacity and distribution are different problems.
Should each bedroom have its own head?
Not necessarily. Concealed duct systems or supplementary heating can also serve groups of rooms.
Where should a ductless head be installed?
Where it provides good room circulation, suitable drainage, service access and comfortable air distribution while meeting manufacturer requirements.
Should a ductless head be above the bed?
Avoid locations where airflow will create persistent occupant discomfort.
Can furniture block a mini-split?
Furniture or cabinetry can interfere with airflow when placed too close to the indoor unit.
Where should the outdoor unit be installed?
In a location with appropriate airflow, clearances, drainage, service access, sound considerations and physical protection.
Can the outdoor unit be enclosed?
Only when the enclosure maintains all manufacturer airflow and clearance requirements. Tight decorative enclosures can cause recirculation or airflow restriction.
Can the outdoor unit go under a deck?
Possibly, provided airflow, service access, drainage and all required clearances are maintained.
Can the heat pump go below a roof edge?
Roof runoff and falling snow or ice should be considered when selecting the location.
Why does defrost drainage matter?
The outdoor coil produces water when frost melts. Poor drainage can create ice around equipment, stairs or walkways.
Is water under the outdoor heat pump normal?
Yes during winter defrost, provided drainage is functioning appropriately.
Should the outdoor unit be raised off the ground?
The appropriate mounting height depends on manufacturer requirements, drainage, snow and site conditions.
Can wall mounting create vibration?
Yes. Structural characteristics, equipment, brackets and vibration isolation all affect transmission into the building.
Is refrigerant line length important?
Yes. Equipment manufacturers specify allowable piping configurations and charge adjustments where applicable.
Can refrigerant lines be too long?
Systems have manufacturer limits and design requirements for piping length and vertical separation.
Should line sets be insulated?
Refrigerant piping should be insulated as required by the equipment design and manufacturer instructions.
Can line-set vibration cause leaks?
Poorly supported piping that rubs against building materials can develop damage over time.
Should exterior line sets be protected?
Yes. Appropriate routing and protective covering can reduce weather and physical damage.
Why does wall penetration detailing matter?
A poor penetration can compromise water, air, thermal or vapour-control layers in the building envelope.
Can heat pump penetrations cause water leaks?
Yes when they are improperly located, sealed or detailed.
Can penetrations cause air leakage?
Yes. Air-control continuity should be restored around the penetration.
Do condo penetrations need special attention?
Yes. Multi-unit buildings can involve common property, fire separations, exterior-envelope requirements and strata approvals.
Does a ductless heat pump need a condensate drain?
Yes. Indoor cooling produces condensate that must be drained safely.
Is gravity drainage better than a condensate pump?
A gravity drain can avoid another mechanical component where reliable routing is practical, but the best method depends on the installation.
Can a condensate pump fail?
Yes. It is a serviceable mechanical component and should remain accessible.
Can poor condensate drainage damage the house?
Yes. Overflow can damage walls, ceilings, flooring and finishes.
Does every heat pump require a 200-amp service?
No. Electrical requirements depend on the home and the exact system.
Can a heat pump be installed on 100-amp service?
In some homes, yes, after an appropriate electrical load assessment.
Should the electrician perform a load calculation?
Electrical capacity should be assessed using an appropriate method before new loads are added.
Can I reuse my old AC breaker?
Only if the circuit and protection meet the requirements of the new equipment.
Does backup heat affect electrical requirements?
Yes. Electric resistance supplementary heating can represent a large part of the HVAC peak electrical load.
Should I install the largest heat kit available?
No. Backup heat should be sized for the system design, building load and heat-pump capacity.
Can bad thermostat settings increase AUX Heat use?
Yes. Control configuration can materially affect supplementary-heating operation.
Can a thermostat be incompatible with a heat pump?
Yes. Compatibility depends on equipment and control architecture.
Can a generic thermostat reduce variable-speed features?
On some communicating systems, changing controls can alter modulation or diagnostic capabilities.
Should a dual-fuel heat pump have a changeover strategy?
Yes. Heat pump and furnace operation should be coordinated intentionally.
Does refrigerant charge matter after installation?
Yes. Correct refrigeration-system setup is important for performance and reliability.
Does every mini-split need refrigerant added?
No. The required procedure depends on factory charge, installed piping length and manufacturer specifications.
Should installers vacuum the refrigerant lines?
Refrigeration commissioning should follow manufacturer procedures for evacuation and system preparation before operation.
Why is evacuation important?
It is used during proper refrigeration-system installation to remove air and moisture from opened piping before commissioning.
Should leaks be checked before startup?
The installed refrigerant circuit should be verified for integrity according to appropriate service procedures.
Can incorrect refrigerant charge reduce efficiency?
Yes. Quality-installation guidance identifies correct refrigerant charge as important to system performance.
Does indoor airflow affect refrigerant readings?
Yes. Airflow affects heat transfer and therefore refrigeration-system operating conditions.
What is an AHRI reference number?
It identifies a certified matched combination of applicable HVAC system components.
Can the same outdoor heat pump have several AHRI matches?
Yes. Different approved indoor equipment can result in different certified combinations.
Can equipment from the same brand still be the wrong match?
Yes. Compatibility and certification apply to exact model combinations rather than brand alone.
Should exact model numbers appear on the quote?
Yes.
Should rebate eligibility be checked before installing?
Yes. Current BC programs have specific homeowner, property, contractor, equipment and installation requirements.
Do current BC Hydro heat pump rebates require eligible equipment?
Yes. Current applicable pathways require equipment on the eligible list, along with other requirements.
Does AHRI matching affect current rebates?
Yes. Current BC Hydro requirements use an AHRI certified reference covering the applicable heat pump components.
Do current rebate pathways require variable-speed equipment?
Current applicable BC Hydro heat pump requirements include a variable-speed compressor requirement.
Can program requirements change?
Yes. Verify current requirements before equipment is ordered or installation begins.
Does a heat pump need an electrical permit in BC?
Technical Safety BC currently states that most residential heat pump installations or upgrades require an electrical permit.
Can removing a gas furnace require a gas permit?
Yes. Modifying or removing regulated natural gas equipment must follow applicable gas requirements.
Does every residential heat pump need a refrigeration permit?
No. Refrigeration regulation depends on factors including equipment capacity, building type and refrigerant characteristics.
Can I install a heat pump myself?
DIY installation can create electrical, refrigeration, permit, warranty and incentive issues. Regulated work must follow applicable BC qualification and permit requirements.
Can a contractor skip permits to reduce the price?
Required permits are part of compliant work and should not be treated as optional savings.
Should permit responsibility be written in the quote?
Yes.
Should commissioning be included in a heat pump installation?
Yes. The installed system should be verified rather than merely energized.
Is startup the same as commissioning?
No. Commissioning includes checking relevant system operation, settings and performance.
Should airflow be tested after installation?
For ducted systems, airflow and static-pressure verification can help confirm that the equipment and ducts operate together correctly.
Should both heating and cooling be tested?
Applicable modes should be verified according to equipment procedures and operating conditions.
Should backup heat be tested?
Yes when the system includes supplementary heating.
Should every indoor head in a multi-zone system be tested?
Yes.
Should the installer explain defrost?
Yes. Homeowners should understand that frost, outdoor fan changes, water and visible vapour can be normal during defrost.
Should the installer explain AUX Heat?
Yes when the system uses automatic supplementary heating.
Should the installer explain Emergency Heat?
Yes when the installed controls provide that mode.
What paperwork should I keep?
Keep the contract, model and serial numbers, final invoice, permit information, warranty registration and relevant commissioning or rebate documents.
What should I do if my newly installed heat pump is not performing properly?
Document the symptoms and ask the installer to verify system design and commissioning, including controls, airflow, equipment operation and refrigeration performance where relevant.
Should I immediately assume the equipment is defective?
No. New-installation problems can also result from configuration, airflow, drainage, wiring, sizing or commissioning.
Does Bernoulli provide free heat pump installation estimates?
Yes. New heat pump installation and replacement estimates are currently free.
How much does Bernoulli charge to diagnose an existing heat pump?
The current diagnostic appointment charge is $135. Repair labour, replacement parts, refrigerant and additional materials are separate.