Top 5 HVAC Companies
in Waterloo
We compared 5 HVAC Companies serving Waterloo, Ontario using publicly available business information, including customer reputation, local presence and documented services. Across the businesses featured here, documented specialties include Air conditioner installation and repair, Furnace installation and repair, and Furnace installation, repair and maintenance.
↗ Waterloo’s featured hvac companies have a FiveBest Score above the Ontario benchmark.
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Aire One Heating & Cooling KW is a Kitchener-based HVAC provider serving Waterloo-area homes with documented heating, cooling, heat-pump, maintenance and emergency-service options.
Furnace installation, repair and maintenance · Air conditioner installation and repair · Heat-pump installation and maintenance
Reliance Heating, Air Conditioning & Plumbing provides residential HVAC installation, repair and maintenance for Waterloo, including furnaces, central air conditioners and heat pump systems. Its official Kitchener service page specifically lists Waterloo and states that emergency heating and cooling repairs are available 24/7.
Furnace installation and repair · Air conditioner installation, repair and maintenance · Heat pump systems
Able Air Conditioning & Heating lists Waterloo among its service locations and provides 24/7 emergency HVAC service. Its offering covers repair, installation, replacement and maintenance for furnaces, central air conditioners, heat pumps and ductless systems, making it relevant for breakdowns, seasonal tune-ups or equipment upgrades.
Heating and cooling system repairs · Furnace installation and replacement · Air conditioner installation and replacement
Total Aire Care Inc. provides heating and central air conditioning sales and service in Waterloo and across Waterloo Region. Its HVAC offering includes furnace and air conditioner installation, repair and maintenance, plus heat pumps and indoor-air equipment. The company documents 24/7 emergency HVAC service and focuses on residential and light-commercial work.
Air conditioner installation and repair · Furnace installation and repair · Heat pump services
Dunn is an established Waterloo HVAC provider with documented furnace, air-conditioning, boiler and heat-pump installation and repair services. The company also lists indoor-air equipment and states that 24/7 emergency HVAC service is available.
Furnace installation and repair · Air-conditioner installation and repair · Heat-pump installation and repair
Waterloo hvac companies lead nearby FiveBest markets
Featured hvac companies in Waterloo have a median FiveBest Score™ of 89/100, compared with 86/100 for featured hvac companies across Ontario.
Among nearby FiveBest markets, Guelph (88/100) scores below Waterloo, while Kitchener (90/100) and Cambridge (89/100) are close to Waterloo.
Comparison based on profiles currently featured by FiveBest in this category with an available FiveBest Score™.
How we researched HVAC Companies in Waterloo
FiveBest reviews publicly available information for HVAC Companies serving Waterloo.
- Google rating and review history
- Documented services
- Years in business when available
- Waterloo and surrounding service coverage
- Business website and online presence
- Independent reputation signals when available
Research last updated: September 2026
Typical HVAC Service Price Ranges
Price ranges are based on typical industry averages. Actual costs may vary according to equipment type, system capacity, installation complexity, property characteristics, labour, permits and local market conditions.
- Service call $120–$250
- Furnace repair $250–$1,200
- AC repair $250–$1,500
- Heat pump install $4,000–$9,500+
- Furnace replacement $4,000–$8,500+
Common Services
- Furnace repair and installation in Waterloo
- Air conditioner repair and installation in Waterloo
- Heat pump installation and repair in Waterloo
- Boiler repair and replacement in Waterloo
- Ductless mini-split systems in Waterloo
- HVAC maintenance and tune-ups in Waterloo
How to Choose an HVAC company in Waterloo
Compare HVAC contractors in Waterloo for furnace and boiler repair, air conditioner installation, heat pump service, ductless mini-split systems, ventilation, thermostats, indoor air quality, seasonal maintenance and emergency heating or cooling. FiveBest helps homeowners and businesses compare selected local HVAC companies in one place.
Compare selected HVAC companies in Waterloo for furnace repair, air conditioning, heat pumps, boilers, ductless systems, maintenance and emergency heating or cooling service.
For repairs, ask what testing supports the diagnosis before replacing major components or equipment.
For replacement, ask how heating and cooling capacity is determined rather than automatically matching the old unit.
Confirm equipment, labour, controls, electrical work, drains, line sets, disposal and commissioning.
Confirm the contractor and technicians meet applicable requirements for HVAC, gas, refrigerant or electrical work.
Ask about permits, inspections and documentation needed for any available efficiency rebates or incentives.
Compare parts, compressor or heat-exchanger, labour warranties and maintenance requirements.
What Affects HVAC Costs
- Type of system
- Heating and cooling capacity
- Efficiency rating
- Ductwork condition
- Electrical or gas upgrades
- Refrigerant and line-set requirements
- Controls and thermostat
- Installation complexity
- Permits and commissioning
- Warranty and maintenance plan
Questions to Ask an HVAC Contractor
- How did you determine the required system capacity?
- What exact equipment model and efficiency rating are included?
- Does my ductwork need changes?
- Are electrical, gas or drainage changes included?
- What permits or inspections apply?
- Is commissioning and system testing included?
- What manufacturer and labour warranties apply?
- What maintenance is required to keep warranty coverage?
Frequently Asked Questions
HVAC costs in Waterloo depend on the equipment, system capacity, diagnosis, required parts, labour, accessibility and whether the work is an emergency repair or a complete installation. Request a written estimate that identifies equipment and warranty details.
Repair may make sense for a newer system with a limited problem. Replacement may be more practical when equipment is old, inefficient, unreliable, expensive to repair or unable to heat or cool the property properly.
Heat pumps can provide efficient heating and cooling, but the appropriate model and backup-heating strategy depend on the local climate, home insulation, electrical capacity and existing HVAC system.
Many contractors recommend seasonal inspection and maintenance, typically before the main heating or cooling season. Follow the manufacturer’s requirements to protect performance and warranty coverage.
Many companies provide emergency service for loss of heat, system failure, unusual smells, electrical issues or other urgent heating and cooling problems. Confirm hours, response area and after-hours fees.
Compare applicable licences, insurance, equipment brands, system-sizing methods, written estimates, efficiency ratings, labour and manufacturer warranties, maintenance plans, financing and recent local reviews.