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What size furnace should I buy?

Square FootageFurnace BTU
1,000-1,200 sq. ft. Home40,000 - 60,000 BTU
1,200-1,500 sq. ft. Home60,000 BTU
1,500-1,800 sq. ft. Home60,000 - 80,000 BTU
1,800-2,500 sq. ft. Home80,000 - 100,000 BTU
2,500-3,500 sq. ft. Home100,000 to 120,000 BTU

Looking for reliable HVAC services in Hamilton, Ontario?
Our directory features trusted heating and cooling companies that Hamilton homeowners depend on for furnace repair, air conditioner installation, heat pump maintenance, and energy-efficient upgrades. Whether you live in the downtown core or on the mountain, you’ll find qualified local contractors ready to help you stay comfortable all year.

Location: Hamilton

  • List Date
  • Listing Title
Sort By
4.9/5
🏆 20 Years of operation
  • (905) 526-4875
  • info@spurrhvac.com
  • spurrhvac.com

Share Spurr Heating And Air Conditioning

5/5
🏆 15+ Years of operation
  • (905) 645-0400
  • billing@staubinmorrison.com
  • staubinmorrison.com

Share St. Aubin Morrison Refrigeration

4.5/5
🏆 65+ Years of operation
  • 9055453959
  • admin@bosanac.ca
  • bosanac.ca

Share Bosanac Heating & Electric Ltd

4.9/5
🏆 5+ Years of operation
  • 6479049870
  • cc@nikhvac.ca
  • nikhvac.ca

Share Nik Heating N Cooling

5/5
🏆 7 + Years of operation
  • 9058025622
  • matt@myhvacguy.ca
  • myhvacguy.ca

Share MY HVAC Guy

5/5
🏆 20+ Years of operation
  • 2267024446
  • info@superiorhvacservice.ca
  • superiorhvacservice.ca

Share Superior HVAC Service, Heating & Air Conditioning

5/5
🏆 25 Years of operation
  • 4169958831
  • jrlheating@gmail.com
  • jrlheatingairconditioning.ca

Share JRL Heating & Air Conditioning

4.8/5
🏆 15+ Years of operation
  • 2892051334
  • contact@bulletproofhvac.ca
  • bulletproofhvac.ca

Share Bullet Proof Heating & Cooling

4.8/5
🏆 75+ Years of operation
  • 9055271049
  • info@hamco.ca
  • hamco.ca

Share HAMCO Heating and Cooling Ltd.

4.6/5
🏆 28 Years of operation
  • 9053181633
  • info@aireonewest.ca
  • aireonewest.ca

Share Aire One West Heating & Cooling

4.3/5
🏆 30 Years of operation
  • 9055748747
  • info@bgheating.ca
  • bgheating.ca

Share B & G Heating & Cooling

4.4/5
🏆 60 Years of operation
  • 2898026257
  • info@boonstraright-time.ca
  • boonstraright-time.ca

Share Boonstra Heating and Air Conditioning

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Hamilton Climate: Heating and Cooling Challenges

Hamilton’s position along Lake Ontario gives it a humid continental climate, with cold, snowy winters and warm, humid summers — conditions that place year-round demand on heating and cooling systems.

  • In winter, strong lake-effect winds can push temperatures well below freezing, putting extra strain on furnaces, heat pumps, and boilers.
  • In summer, the combination of heat and humidity can make indoor spaces uncomfortable without a properly functioning air conditioner.

Because of these seasonal extremes, Hamilton homeowners often schedule spring and fall HVAC tune-ups to keep their systems efficient and dependable. Regular maintenance can lower energy bills, extend equipment life, and prevent unexpected breakdowns during peak weather.


Living in Hamilton: Neighborhoods and Landmarks

Hamilton is a vibrant city known for its historic character, industrial roots, and stunning natural landscapes. Popular neighbourhoods include Ancaster, Dundas, Stoney Creek, Waterdown, Westdale, and the Downtown Core.

From the breathtaking views at Webster’s Falls and Albion Falls to the lively arts scene on James Street North and the relaxing waterfront at Bayfront Park, Hamilton offers a dynamic lifestyle where nature and city life coexist beautifully.

Residents take pride in warm, energy-efficient homes — especially during the winter months when furnaces and heat pumps work their hardest.


Hamilton Weather & Home Comfort Tips

Hamilton’s climate brings icy winds, snow, and rapidly shifting temperatures in winter, while summers are often humid and warm. To stay comfortable year-round, homeowners commonly:

  • Schedule annual furnace and AC maintenance
  • Replace filters and clean vents for better airflow
  • Upgrade to high-efficiency HVAC systems
  • Use smart thermostats to manage energy costs
  • Explore indoor air quality solutions for humid conditions

A properly maintained HVAC system boosts comfort, improves air quality, and keeps energy costs manageable.


Find the Right HVAC Contractor in Hamilton

When comparing HVAC companies in Hamilton, look for contractors offering:

  • Professional furnace, boiler, and AC installation
  • 24/7 emergency heating and cooling repair
  • Energy-efficient system recommendations
  • Indoor air quality and duct cleaning services
  • Transparent pricing and verified customer reviews

Our directory makes it easy to compare trusted Hamilton HVAC companies so you can choose the right expert for your home.


Why Choose a Local Hamilton HVAC Company?

Hamilton’s mix of lakefront communities and elevated “Mountain” areas creates microclimates across the city — something local contractors understand well. A local HVAC professional can:

  • Recommend furnace sizes suited to your home’s layout and insulation
  • Suggest air conditioners built for high humidity
  • Provide maintenance plans based on Hamilton’s weather patterns

Local experts also respond more quickly during heating emergencies or summer heatwaves, giving homeowners peace of mind.


Discover Hamilton: City Life and Comfort


Browse the Hamilton HVAC companies listed above to compare pricing, warranties, and service quality. Read verified customer reviews, request quotes, and choose a trusted local contractor for furnace repair, AC installation, or full HVAC system service. Stay comfortable in Hamilton’s changing climate with the right expert by your side.


Current Weather Hamilton

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Hamilton, CA
5:29 am, Nov 18, 2025
temperature icon -1°C
Clear
Humidity: 81 %
Pressure: 1019 mb
Wind: 7 mph
Wind Gust: 11 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 7:17 am
Sunset: 4:52 pm
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