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Best HVAC Companies in Hamilton

Browse the list of local, most reputable and highly rated HVAC companies below.

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4.6
Based on 2,804 reviews

LG Home Comfort Services

  • Location icon

    301 Bradwick Dr,
    Vaughan, ON
    L4K 1K5

  • Phone icon +1 866-438-5442
  • Email Icon info@lghomecomfort.ca
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5.0
Based on 1,372 reviews

Smile HVAC Services

  • Location icon

    8540 Keele St Unit 41,
    Vaughan, ON
    L4K 3P4

  • Phone icon +1 437-777-4555
  • Email Icon info@smilehvac.ca
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4.7
Based on 9,987 reviews

Reliance Home Comfort Services

  • Location icon

    2 Lansing Square,
    North York, ON
    M2J 4P8

  • Phone icon +1 866-780-3703
  • Email Icon info@reliancehomecomfort.com
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4.7
Based on 664 reviews

Martino HVAC Services

  • Location icon

    150 Connie Crescent #16,
    Vaughan, ON
    L4K 1L9

  • Phone icon +1 800-465-5700
  • Email Icon service@martinohvac.com
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4.9
Based on 509 reviews

HVAC Trust Services

  • Location icon

    330 Hwy 7 Unit#305,
    Richmond Hill, ON
    L4B 3P8

  • Phone icon +1 855-916-0615
  • Email Icon contact@hvactrust.ca
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4.8
Based on 571 reviews

Aire One Services

  • Location icon

    2800 John St.,
    Markham, ON
    L3R 0E2

  • Phone icon +1 416-460-5300
  • Email Icon metrotoronto@aireone.com
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Ontario HVAC Reviews

Leading HVAC Experts 
in Hamilton

Discover the premier HVAC services in Hamilton, ranked by customers just like you. Sort by ratings or choose businesses with the most reviews.

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Most companies provide 24 hours / 7 days a week emergency service for critical HVAC issues.
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Leading HVAC Experts 
In Mississauga – Ontario HVAC Reviews

FAQs

Common questions about HVAC services and solutions for Ontario homeowners.

We recommend annual maintenance for optimal system performance. Typically, a professional check-up in spring and fall helps prevent unexpected breakdowns.

Most companies provide 24/7 emergency HVAC repair services across major Ontario cities. Please be sure to check directly with an HVAC company of your choice if they can respond quickly to urgent heating and cooling issues you might have.

Currently, the directory lists HVAC companies serving Toronto, Mississauga, Ottawa, Kitchener, Brampton, Vaughan and Hamilton. Each company might also service additional regions on Ontario, so make sure to check the reviews or directly on a company website.

All companies listed in this directory should have technicians that are fully licensed, insured, and professionally trained to maintain the highest standards in HVAC services. However, please double check with an HVAC company before booking a service.

Most companies can provide energy-efficient HVAC systems and can help you access green rebate programs to reduce your environmental impact and energy costs. You can also learn more about various Ontario and federal rebate programs here.
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Explore Green Rebates Program

Ontario homeowners can access thousands of dollars in green energy rebates for HVAC upgrades in 2026. Find out which programs you qualify for and how to apply.

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