HVAC FAQ Calgary: Your Heating & Cooling Questions Answered

About Purcell Heating & Air

Purcell Heating & Air has been serving Calgary and surrounding communities since 1995 — over 30 years of certified air conditioning, furnace, and heat pump installation, repair, and maintenance across Alberta and British Columbia’s Columbia Valley.
Yes. All Purcell technicians hold Alberta journeyman certification in refrigeration and air conditioning mechanics. Every AC repair, AC installation, and AC maintenance job is completed or directly supervised by a certified journeyman — we do not send uncertified technicians to any job, anywhere.
Yes, always. We provide a written, itemized quote before any work begins — whether it is an air conditioner repair, a furnace installation, or a full AC replacement. The price you are quoted is the price you pay — no surprise fees and no verbal estimates that change once a technician is on-site.
Yes. We offer emergency HVAC service for urgent no-heat and no-cooling situations across all our service areas in Alberta and British Columbia. Contact us directly for emergency calls.
We install and service Carrier, Lennox, Daikin, Amana, Rheem, Trane, Gree, KeepRite, and York systems. Our technicians are trained on all major residential and commercial HVAC brands.
Yes. We offer Alberta Membership Plans and BC Membership Plans that include priority scheduling, discounted parts pricing, and waived service call fees. A membership is the most cost-effective way to protect your heating and cooling systems long-term.
Yes. Purcell Heating & Air holds BBB accreditation with an A- rating, reflecting our commitment to transparent pricing, certified workmanship, and customer satisfaction across every air conditioning and furnace service we provide.

Air conditioning — General

Yes — increasingly so. Calgary summers regularly see temperatures above 30°C, and heat waves arrive earlier and last longer than they did a decade ago. Most Calgary homeowners who install central air conditioning describe it as one of the most impactful home comfort upgrades they have made. Contact us to find out which system is right for your home.
The right system depends on whether your home has existing ductwork. If you have a forced-air furnace with ductwork in good condition, a central air conditioner installation is the most efficient whole-home solution. If your home has no ductwork, a ductless mini split system provides targeted cooling without the need for duct installation.
All new AC units installed in Alberta must meet a minimum 14.5 SEER2 efficiency rating. For Calgary homeowners who want meaningfully lower electricity bills, systems rated 16 SEER2 and above offer the best balance of upfront cost and long-term energy savings. Learn more about our Calgary AC installation options including high-efficiency models from Lennox, Carrier, and Daikin.
A properly sized and maintained central air conditioner in Calgary lasts 12 to 15 years on average. The biggest factors in system longevity are correct sizing at installation, regular filter changes, and professional AC maintenance every one to two years.
No. Evaporative cooling relies on high humidity to function and Calgary’s dry prairie climate makes it ineffective. For Calgary homeowners, a conventional high-efficiency central air conditioner or ductless mini split is always the recommended solution.
Yes. Running your air conditioner with windows and doors closed keeps wildfire smoke particles outside. Learn more about how our indoor air quality services and whole-home air purifiers can further protect your family during wildfire smoke events.
AC installation in Calgary typically ranges from $4,500 to $9,500 fully installed for a central system, depending on system size, efficiency rating, and brand. See our full Calgary AC installation page for more details, or contact us for a written itemized quote specific to your home.
Yes. A City of Calgary permit is required for all central AC installations. Purcell handles all permit coordination as part of our air conditioning installation process — it is included in your quoted price, not added later.
A Manual J load calculation determines the correct AC size for your specific home. Every Purcell AC installation begins with a load calculation — skipping it is one of the most common installation errors in the industry, resulting in an oversized or undersized system that underperforms from day one.
An oversized air conditioner short cycles — it cools the space quickly without completing a full humidity removal cycle, leaving your home feeling clammy. This also causes faster compressor wear and higher electricity bills. Correct sizing through a proper load calculation at AC installation prevents this entirely.
Spring — April through May — is the ideal window. Book your AC installation early to secure your preferred date before Calgary’s first heat wave fills our schedule.
Yes. A ductless mini split system provides efficient, zoned cooling for homes without existing ductwork. Gree, Daikin, and Carrier all offer excellent ductless options that Purcell installs and services across all our service areas.
Central AC provides cooling only. A heat pump provides both cooling in summer and heating in winter — replacing the need for a separate AC unit and supplementing your gas furnace during the coldest months. See our heat pump installation page for full details.
A general starting point is approximately 1 ton of cooling per 600–700 sq ft. However, the accurate size is always determined through a Manual J load calculation. Contact Purcell and we will size your system correctly before recommending any equipment.
Look for Alberta journeyman certification, written quotes, a clear labour warranty, and a permit-pulling policy on every job. Explore our full range of air conditioning services in Calgary or get in touch today.

AC repair

The most common cause is low refrigerant due to a system leak. Other causes include a dirty evaporator coil, a failing compressor, or a blocked condenser. Turn the system off to prevent further damage and book an AC repair inspection with a certified Purcell technician.
Banging or rattling usually means a loose or broken component — a fan blade, motor mount, or blower wheel. Shut the unit off and book an AC repair before the damage spreads to more expensive components.
Hissing or bubbling almost always indicates a refrigerant leak. The leak must be located, repaired, and the system properly recharged by a certified technician. Contact Purcell for a same-day inspection.
Grinding or squealing typically points to a failing motor bearing. Shut the unit off immediately and book an AC repair call — continuing to run the system accelerates the damage significantly.
Water pooling around your indoor unit is almost always caused by a blocked condensate drain line or a frozen evaporator coil. Turn the system off and contact Purcell for an AC repair inspection — left unaddressed, this leads to water damage and mold growth.
This is called short cycling. Check and replace your air filter first. If short cycling continues, book an AC repair before the compressor sustains damage — it is the most expensive single component in any AC system.
Possible causes include a refrigerant leak, a frozen evaporator coil, a blocked condenser, or a failing compressor. A proper diagnosis from our Calgary AC repair team is the only reliable way to identify the exact cause.
A musty smell indicates mold or mildew inside the air handler or on the evaporator coil. Our professional AC maintenance service includes coil cleaning and drain pan treatment that resolves this issue in most cases.
A burning smell means an electrical component is overheating or has failed. Shut the system off immediately and call Purcell for emergency AC repair — do not operate the system until it has been inspected.
Start by checking and replacing your air filter. If weak airflow continues, book an AC repair inspection to assess the blower motor and ductwork — both are common causes of reduced airflow across a whole-home system.
An AC working harder than it should — due to a dirty coil or low refrigerant — uses significantly more power. Schedule an AC tune-up or AC maintenance visit to restore your system’s rated efficiency.
A capacitor starts and runs the compressor and fan motors. It is one of the most common failure points in Calgary AC systems. Replacement is an affordable AC repair when caught early — but if ignored, a failed capacitor can cause compressor damage.
A contactor is the electrical switch that connects your outdoor unit to its power supply. Signs of failure include the system not starting, buzzing from the outdoor unit, or the system running continuously without shutting off. Book an AC repair if you notice any of these symptoms.
Call immediately if your home is above 30°C with no cooling, if you smell burning from the unit, or if someone in your home has a medical condition affected by heat. Contact Purcell now for same-day emergency AC repair across Calgary and all surrounding communities.
No. Refrigerant handling in Canada is regulated and must be performed by a certified technician. Contact our AC repair team for a proper refrigerant leak diagnosis and recharge.
Most standard AC repairs in Calgary — capacitor replacement, drain line clearing, coil cleaning — are completed in one to two hours. Purcell technicians carry a full parts inventory so most repairs are completed in a single visit.
A Purcell AC repair diagnostic includes refrigerant pressure testing, electrical component testing, airflow measurement, drain line inspection, coil condition assessment, and a written quote for any repairs identified — before any work begins.
AC repair addresses a specific problem causing the system to malfunction. AC maintenance is a preventive service that catches developing problems before they become failures. Annual maintenance significantly reduces the frequency and cost of emergency repair calls.

AC maintenance & Tune-Ups

Annual professional AC maintenance is recommended for all Calgary homes — ideally in spring before the first heat wave. Homes with pets or systems over 10 years old benefit most from consistent annual servicing.
A professional AC maintenance visit includes refrigerant pressure testing, condenser coil cleaning, capacitor and contactor testing, condensate drain line flushing, supply air temperature measurement, and filter assessment. See our full AC maintenance page for a complete checklist.
Calgary’s chinook winds carry dust and poplar fluff that pack into the outdoor condenser coil every season. Annual coil cleaning during your AC maintenance visit restores heat exchange efficiency and is one of the highest-impact tasks for Calgary homeowners.
Standard 1-inch filters should be replaced every one to three months during active cooling season. If you are unsure which filter your system needs, our AC maintenance technicians will advise the correct type and replacement frequency for your specific system.
An AC tune-up and maintenance service are functionally the same — a comprehensive preventive inspection and cleaning covering all mechanical, electrical, and refrigerant components of your air conditioning system.
Yes, significantly. A dirty condenser coil, low refrigerant, or a struggling blower motor all cause your AC to consume more electricity. Professional AC maintenance restores the system to its rated efficiency — directly reducing your electricity bill throughout Calgary’s cooling season.
Homeowners can safely replace air filters and clear debris around the outdoor condenser. However, refrigerant pressure testing, coil cleaning, and electrical component testing require professional equipment and certification. Book a professional AC maintenance visit for these tasks.
Skipped maintenance leads to accelerated coil fouling, refrigerant pressure drift, drain blockages, and electrical component degradation — all resulting in higher electricity costs, more frequent AC repair calls, and a significantly shortened system lifespan.
Our Alberta Membership Plans and BC Membership Plans provide annual AC maintenance visits, priority scheduling during peak demand, discounted parts, and waived service call fees — keeping members first in line when it matters most.
Yes — a spring AC maintenance visit ensures your coils, filter housing, and drain line are clean before smoke season begins. Combine this with our indoor air quality services for comprehensive protection during wildfire smoke events.

AC replacement

Replace rather than repair if your system is 12+ years old, the repair estimate equals 50% or more of AC replacement cost, you have had multiple breakdowns in consecutive summers, or the system uses R-22 refrigerant. Contact Purcell for an honest, no-pressure assessment.
Multiply the age of your system by the repair cost. If the result exceeds $5,000, AC replacement is generally the smarter financial decision. Our team can walk you through this calculation honestly during a repair diagnostic visit.
Complete AC replacement in Calgary typically ranges from $4,500 to $9,500 fully installed. Purcell provides a written itemized quote covering all components — equipment, labour, permits, and ductwork inspection — before any work begins.
If both systems are aging, replacing them together reduces total labour cost and ensures properly matched equipment. See our furnace replacement page and AC replacement page for combined package options.
A standard central AC replacement is typically completed in one day — including removal of the old system, new system installation, refrigerant commissioning, permit coordination, and a full performance test before we leave.
Purcell installs Carrier, Lennox, Daikin, Amana, Rheem, Trane, Gree, KeepRite, and York systems for AC replacement across Calgary and all service areas.
Every new AC replacement includes the manufacturer’s equipment warranty plus Purcell’s labour warranty on the installation. Amana provides a Lifetime compressor warranty on flagship models. We register your manufacturer warranty on your behalf as part of the process.
Our AC replacement process includes an in-home load calculation, a written itemized quote, permit coordination, professional installation by certified technicians, refrigerant commissioning, airflow testing, system performance verification, and a full walkthrough before we leave.
An oversized AC short cycles — cooling quickly without removing humidity, leaving your home feeling clammy. An undersized AC runs constantly without reaching target temperature. Every AC replacement Purcell completes begins with a Manual J load calculation to eliminate both problems.

furnace-GENERAL, REPAIR & INSTALLATION

Most Calgary furnaces last 15 to 20 years with regular annual furnace maintenance. After 20 years, efficiency drops significantly and breakdown frequency increases — making furnace replacement the more cost-effective choice.
Signs include insufficient heat output, unusual noises such as banging or squealing, a yellow or orange pilot flame, frequent cycling, a sudden rise in your gas bill, or visible soot around the unit. Any of these warrants a professional furnace repair inspection.
A professional furnace maintenance visit includes heat exchanger inspection, burner and ignition testing, gas pressure verification, flue assessment, blower motor evaluation, filter assessment, and thermostat calibration. Annual maintenance prevents the majority of emergency furnace breakdowns during Calgary’s winter months.
The heat exchanger transfers heat from combustion to your home’s air supply. A cracked heat exchanger is a serious safety concern — carbon monoxide can enter your living space. If our technician identifies a cracked heat exchanger during a furnace repair visit, we will explain your options clearly and honestly.
High-efficiency Calgary furnaces reach 96% to 98.5% AFUE. Upgrading from 80% to 96% AFUE produces meaningful monthly gas bill reductions. See our full range of high-efficiency furnace installation options across Calgary.
Common causes include a thermostat set to Fan-Only, a dirty air filter, a tripped limit switch, a failed igniter, or a gas supply issue. Check your thermostat settings and filter first. If cold air continues, contact Purcell for a furnace repair diagnosis.
A banging noise at startup is often caused by delayed ignition — a safety concern requiring immediate professional attention. Book a furnace repair call with Purcell right away and do not continue operating the system.
No. A yellow flame indicates incomplete combustion and possible carbon monoxide production. Shut the furnace off immediately and contact Purcell for emergency furnace repair.
Most furnace installations are completed in one day — including removal of the old unit, installation, venting, gas connections, permit coordination, system startup, and a full thermostat walkthrough before we leave.
Yes. Our technicians are trained on all major brands including Carrier, Lennox, Daikin, Amana, Rheem, Trane, York, and KeepRite. Book a furnace repair visit regardless of your system’s brand.
A two-stage furnace runs at a lower output on mild days — producing more consistent temperatures and quieter operation. For Calgary’s variable autumn and spring temperatures, two-stage operation is a meaningful comfort upgrade. See our furnace installation page for available two-stage options.
A variable-speed blower adjusts its speed continuously based on actual heating demand — delivering more consistent temperatures, quieter operation, better air filtration, and lower electricity consumption. It also improves AC performance in summer since the same motor circulates cooled air through your home.
Leave the home immediately with all occupants and pets. Call 911 from outside. Do not re-enter until emergency services confirm the home is safe. Contact Purcell for a full furnace repair and inspection once emergency services have cleared the property.
Replace rather than repair if your furnace is over 18 years old, the repair cost exceeds 50% of furnace replacement cost, or you have had multiple breakdowns in recent winters. Contact Purcell for an honest assessment with no pressure to upsell.
Replace your filter every one to three months, book annual furnace maintenance, ensure all supply and return vents are unobstructed, and consider upgrading your thermostat to a smart model that optimizes your heating schedule automatically.

HEAT PUMPS

A heat pump provides both heating in winter and cooling in summer using the same refrigerant-based technology as an air conditioner. One system replaces the need for a separate furnace and air conditioner. Learn more on our heat pump page.
Yes. Modern cold-climate heat pumps are rated for full heating operation down to -25°C. Most Calgary installations use a dual-fuel setup — the heat pump handles most of the year and the gas furnace activates as backup during extreme cold snaps.
Yes. A heat pump replaces your central air conditioner entirely, providing summer cooling plus efficient winter heating. See our heat pump installation page for full details on upgrading from a cooling-only system.
A ductless mini split heat pump provides both heating and cooling for a specific zone without requiring ductwork — ideal for Calgary homes with additions, basement suites, or rooms the main system does not reach effectively.
We install and service heat pumps from Carrier, Lennox, Daikin, Gree, Trane, and Rheem. Contact us for current availability and our recommendation for your specific home.
A standard ducted heat pump installation replacing an existing central AC typically takes one to two days. A ductless mini split installation takes four to six hours per zone — including commissioning, permit coordination, and a full system test before we leave.
A dual-fuel system pairs a cold-climate heat pump with your existing gas furnace. The heat pump handles heating and cooling for the majority of the year and the furnace activates automatically during the coldest Calgary days — delivering year-round comfort with significantly lower energy consumption than a furnace-only setup.
ATCO and ENMAX periodically offer rebates on qualifying cold-climate heat pump equipment. The Canada Greener Homes Loan (interest-free, up to $40,000) is available federally for eligible upgrades. Contact us and we will confirm what rebates are currently active the week you are making your decision.
Yes — a properly specified cold-climate heat pump handles both. For Calgary’s extreme cold days, a dual-fuel setup with your existing gas furnace as backup ensures you are never without heating regardless of outdoor temperature. Contact Purcell for a full home assessment.
The diagnostic process is similar — refrigerant checks, electrical component testing, airflow measurement. However, a heat pump repair also involves checking the reversing valve and defrost cycle, which are components unique to heat pump systems. Purcell technicians are certified for both heat pump repair and AC repair.

INDOOR AIR QUALITY

Calgary’s dry climate makes excessive dryness the most common issue in winter. Dust, pet dander, mold spores, and wildfire smoke are also frequent concerns. Explore our full range of indoor air quality services in Calgary including air purifiers and whole-home humidifiers.
Almost certainly yes. Forced-air furnaces dry the air significantly during operation, and Calgary’s dry prairie climate compounds the problem further. The recommended indoor range is 30–45% relative humidity. Our whole-home humidifier installation service resolves this efficiently and permanently.
A whole-home air purifier installs inline with your existing HVAC system and filters all the air circulating through your home — treating every room continuously, unlike portable units that only cover one space at a time.
Yes. A whole-home air purifier with HEPA-level filtration, combined with a MERV-13 filter on your furnace, provides meaningful reduction in fine smoke particles. Explore our indoor air quality services for a complete smoke protection solution.
MERV-8 is the standard recommendation for most Calgary homes. MERV-11 or MERV-13 is recommended for allergy concerns or during wildfire smoke events. Our AC maintenance technicians confirm which rating your specific system can handle without airflow restriction during every service visit.
A UV air purifier installs near the evaporator coil inside your air handler and uses ultraviolet light to neutralize bacteria, mold spores, and viruses as air passes through. Many Calgary homeowners combine a MERV-13 filter with a UV system for comprehensive air quality management. Learn more on our air purifiers page.
A bypass humidifier draws warm air from the furnace over a water panel and adds moisture as it passes through. A steam humidifier boils water to create steam independently of furnace operation — providing more precise humidity control. See our humidifiers page for a full comparison of available options.
Yes. Excess dust on the evaporator coil reduces cooling efficiency, and mold in the drain pan degrades air quality further. Annual AC maintenance that includes coil cleaning and drain pan treatment directly improves both system performance and indoor air quality simultaneously.

THERMOSTATS

A smart thermostat learns your preferences, adjusts automatically, and allows remote control via smartphone. Explore our thermostat installation and upgrade page — most smart thermostats pay for themselves in energy savings within one to two years for Calgary homeowners.
We install and configure Ecobee and other leading smart thermostat brands compatible with your existing HVAC equipment. Every thermostat installation includes configuration, schedule setup, and a full app walkthrough before we leave.
Not necessarily, but a communicating or smart thermostat unlocks the full efficiency and comfort potential of advanced two-stage or variable-speed AC systems. Our team will advise the best option during your AC installation.
Possible causes include thermostat placement near a window, exterior wall, or heat source creating a false reading, or a calibration drift in the sensor. Contact Purcell to assess whether recalibration or a thermostat replacement is appropriate.
The recommended summer cooling setpoint for most Calgary homes is 24°C to 26°C when occupied. Raising the setpoint by 2 to 3 degrees when the home is unoccupied for more than four hours reduces electricity consumption meaningfully. A smart thermostat handles this automatically based on your schedule.
Most Calgary homes are comfortable at 20°C to 22°C during waking hours. Lowering the setpoint to 16°C to 18°C during sleep or extended absences reduces gas consumption significantly. A programmable or smart thermostat automates these adjustments so you never have to remember.

COMMERCIAL HVAC

Yes. Purcell provides commercial HVAC services across Calgary and our Alberta and BC service areas — including commercial rooftop units, multi-zone systems, and commercial garage heater installation.
Yes. We install commercial garage heaters — radiant and forced-air styles — for automotive shops, industrial garages, warehouses, and mixed-use commercial facilities across Calgary and surrounding communities.
Most commercial HVAC systems benefit from quarterly inspections and maintenance — more frequently than the annual residential standard — due to higher operating hours and more demanding thermal loads. Contact Purcell to discuss a maintenance schedule for your specific building and equipment.
Yes. We maintain dedicated service coverage for Columbia Valley vacation properties in Invermere, Windermere, Fairmont Hot Springs, Radium Hot Springs, Panorama, and surrounding communities. Contact us to discuss priority response requirements for your property.
Our commercial technicians are trained on all major commercial HVAC brands including Carrier, Lennox, Trane, Daikin, and York. Contact us to confirm service availability for your specific equipment.

WATER HEATERS

Yes. Purcell provides water heater installation in Calgary for both traditional tank and tankless (on-demand) systems. Contact us for a written quote on supply and installation.
A tank water heater stores and continuously heats a fixed volume of water. A tankless unit heats water on demand — eliminating standby heat loss and providing an unlimited hot water supply. Learn more about both options on our Calgary water heater installation page.
Tank water heaters typically last 10 to 15 years. Tankless water heaters last 20 years or more with regular maintenance. If your unit is showing signs of corrosion, inconsistent hot water, or pressure relief discharge, contact Purcell to discuss water heater replacement options.
Yes, in most cases. A natural gas tankless water heater requires an adequate gas supply line and appropriate venting. Purcell assesses your existing infrastructure as part of the water heater installation quote process and identifies any upgrades required before providing pricing.
Tank water heaters benefit from annual anode rod inspection and periodic flushing to remove sediment. Tankless water heaters should be descaled annually in Calgary’s moderately hard water. Purcell can include water heater maintenance in your annual furnace maintenance or AC maintenance visit.

BOOKING & SERVICE PROCESS

Contact us through our website or by phone. We offer scheduled service visits and emergency calls across all our Alberta and BC service areas. Membership plan holders receive priority scheduling.
Your address, the type of system you have (furnace, central AC, ductless, heat pump), the brand and approximate age of the equipment if known, a description of the symptom you are experiencing, and whether the situation is urgent or scheduled.
Contact us directly for current service call and diagnostic fee information. We always provide a written quote covering all identified repairs before any work begins — you will know the full cost before approving anything.
For straightforward replacement projects, we can often provide a preliminary estimate by phone or email based on your home details. For repair calls, a technician must diagnose the specific issue before an accurate quote can be provided. All written quotes are confirmed after an in-home assessment.
Contact us to discuss payment options for larger replacement or installation projects. We work with homeowners across Calgary and our service areas to make major HVAC investments manageable.
Purcell backs our work with a labour warranty on every repair. If a repair we performed fails within the warranty period, we return and address it at no additional labour charge. The specific warranty terms are outlined in your service documentation.
Yes. We service all major residential and commercial HVAC brands regardless of who completed the original installation. Get in touch with your make, model, and system age and we will confirm service availability.
For emergency calls, we prioritize same-day response across Calgary and all surrounding Alberta communities. Membership plan holders are prioritized during peak demand periods in both summer and winter.
For no-cooling: turn the AC off to prevent further damage, use fans to circulate air, and close blinds on sun-facing windows. For no-heat: use supplemental heating safely, gather household members in one room to conserve warmth, and check that your thermostat batteries are functional and your filter is not completely blocked.
Yes. We serve all our confirmed Alberta communities from Calgary through to Didsbury and Bragg Creek, and all our British Columbia communities across the Columbia Valley from Cranbrook to Fernie and Golden. See our full Alberta and British Columbia service pages for the complete list.
Contact us to enrol in either our Alberta Membership Plan or BC Membership Plan. Members receive annual AC maintenance and furnace maintenance visits, priority scheduling, discounted parts, and waived service call fees — all year round.

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