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HVAC contractors in Thornhill, Ontario

Planning an HVAC project doesn’t have to be complicated. Post the details of your heating or cooling needs on HomeStars, and we’ll match you with HVAC contractors and companies in Thornhill, Ontario. Explore their previous projects, browse real reviews, compare quotes, and hire the pro who’s right for your home.

Some of our top rated hvac contractors in Thornhill, Ontario

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    • Best of Awards 2025
    • Best of Newly Listed 2024

    Welcome to Cornerstone, the premier choice for home building and renovation in the Greater Toronto Area. Find out what sets our team apart from the rest. EXCELLENCE IN CRAFTSMANSHIP, UNMATCHED CUSTOMER SERVICE At Cornerstone, we are dedicated to helping our clients turn their dream homes into a reality. We are a family-owned and operated business, and our top priority is to provide excellent workmanship and outstanding customer service. We understand that building or renovating a home is a big undertaking, which is why we have an experienced team to guide you through every step of the process. AFFORDABLE OPTIONS TO SUIT YOUR PROJECT Our services include custom home builds and renovations to fit every budget and style. Whether you are looking to build your dream home from scratch, or just need to make some updates to your existing space, we have the expertise to help you achieve your goals. OUR COMMITMENT We know that there are many options out there when it comes to construction companies, which is why we strive to stand out from the competition. We are committed to punctuality and efficiency, and we always go the extra mile to make sure our clients are completely satisfied with our work. OUR MISSION - To revolutionize the experience of building and renovations with a simplified and enjoyable process - To offer the best building solutions to our client-partners by providing versatile solutions for all types of building projects and budgets - To provide exceptional customer service and workmanship by treating every project as our own! Give us a call today!

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  • HVAC contractor in Thornhill, Ontario

    Our company, Lom Enterprises Ltd provides top-notch masonry services offering a variety of bricks and stones. We build and restore structures to long-lasting beauty and functionality.

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  • HVAC contractor in Thornhill, Ontario

    Welcome to our ideal, mechanical With over five years of experience serving the GTA and surrounding areas, we specialize in the installation, maintenance, and repair of furnaces, air conditioners, heat pumps, hot water tanks, HRV/ERV systems, tankless water heaters, combi boilers, ductwork, and commercial and residential gas lines. We are fully licensed, insured with $5 million liability insurance, and WSIB covered. Our team is also certified for working at heights and lift operation, ensuring safety and quality in every job.”

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  • HVAC contractor in Thornhill, Ontario

    Direct contact information can be found online via our web site or our social media accounts, Facebook & Instagram. WHO YOU TRUST WITH YOUR ELECTRICAL WORK MATTERS. Electrical work affects the safety of your home, your property and the people who matter most. You deserve an electrician who is qualified to do the work—and someone you can feel comfortable welcoming through your door. CLI Electric is an ECRA/ESA-licensed and fully insured electrical contractor serving homeowners throughout Toronto, the GTA and surrounding communities. Our field professionals are experienced, courteous and background checked, giving you greater peace of mind about who is working in your home. With more than 20 years of electrical experience, we have built our reputation on honest recommendations, clear communication and quality workmanship. We take the time to understand the problem, explain your options and recommend what your property actually needs—without pressure or unnecessary upselling. From troubleshooting and electrical repairs to renovations, installations and larger residential projects, CLI Electric is committed to completing your work safely, professionally and correctly. Commercial electrical services are also available for businesses and property owners. WHY CUSTOMERS TRUST CLI ELECTRIC • ECRA/ESA licensed and fully insured • Experienced, background-checked field professionals • More than 20 years of electrical experience • Honest recommendations and straightforward communication • Respectful service and careful treatment of your property • Quality workmanship backed by our 2-year limited workmanship guarantee When you choose CLI Electric, you’re choosing an established electrical contractor that values your trust, respects your property and stands behind its work. SERVICE • EXPERTISE • VALUE • INTEGRITY CLI Electric—we’re the good guys your friends and family told you about. Contact us today to schedule electrical service or request an estimate for your upcoming project. CLI ELECTRIC contact information can be found online

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  • HVAC contractor in Thornhill, Ontario

    Welcome to BricksByBaz 🧱 We specialize in brick painting, restoration, waterproofing, and masonry repair across the GTA. Our focus is simple—clean finishes, proper preparation, and results that last. Every project includes pressure washing, crack repair, and detailed prep before any coating is applied. No shortcuts. Just quality work backed by a warranty.

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  • HVAC contractor in Thornhill, Ontario

    I have been working in trades for over 5 years as a general contractor doing big or small projects.

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  • HVAC contractor in Thornhill, Ontario

    Perfect Group Construction TO is a licensed and insured general contracting company dedicated to providing high-quality, reliable, and professional services to both residential and commercial clients. We specialize in a range of essential construction and renovation services, including: Painting (Interior & Exterior) Drywall Installation and Repair Plumbing Services Tile Installation and Repair Our commitment is to delivering exceptional workmanship, clear communication, and ensuring complete client satisfaction. We strive to build lasting relationships with our clients by prioritizing integrity and attention to detail in every project.

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  • HVAC contractor in Thornhill, Ontario

    We are New age plumbers that thrive on helping people in our community by solving their plumbing problems. big or small we have the tools and know-how to get the job done once and get it done right. We are will to negotiate price👍

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  • HVAC contractor in Thornhill, Ontario

    J Power Contractor is a residential and commercial contracting company that has been serving the GTA for over years. We combine an enthusiasm for quality and precision with an established track record for client satisfaction that meets the highest expectations on every project. We are a proven project partner when cost certainty and quality outcomes are priority. As a fully licensed and insured general contracting company, J Power Contractor is committed to quality workmanship, and providing clients with industrious and expert workers who want to get the job done right the first time. Liability Insurance Covered WSIB Covered

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  • HVAC contractor in Thornhill, Ontario

    We take pride in providing the best reliable appliance repair and installation service in town. We Provide Same Day Repair.

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  • HVAC contractor in Thornhill, Ontario

    Solutions for all your needs in and around your home or office. We offer a standard hourly rate, regardless of how big or small the job is. Need a lightbulb changed, a picture hung, a door handle repaired, wallpaper installed...call us!

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  • HVAC contractor in Thornhill, Ontario

    We service Gta and the surrounding areas, contact to get the best quotes possible. We are an licensed hvac company with WSIB TSSA and liability insurance

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  • HVAC contractor in Thornhill, Ontario

    Need a General contractor, Window Contractor, Kitchen Renovation Company, Electrician, Handyman, Carpenter, Plumber, Tiler, Bathroom Renovation Company, Interior designer, Concrete Specialist, Condominium/Apartment Specialist, Interior decorator, HVAC contractor & Architect based in York, Ontario or nearby? Master art can help you. We pride ourselves on the quality work that we deliver to each and every client. Contact us to talk about your job and get a quote.

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  • HVAC contractor in Thornhill, Ontario

    Nimchi Inc. is a fully licensed and insured electrical contracting company proudly serving residential, commercial, and industrial clients across Ontario. Founded and operated by Nima Rashidipour, a Master Electrician (ME), Red Seal Electrician (RSE), and Licensed Electrical Contractor (ECRA/ESA #7018388), Nimchi Inc. is built on integrity, precision, and innovation. Our team provides a complete range of electrical services including new installations, troubleshooting, panel upgrades, lighting design, automation, EV charger setup, generator integration, and energy-efficient retrofits. We adhere strictly to the Ontario Electrical Safety Code (OESC) and ESA standards to ensure every project is safe, reliable, and future-ready. At Nimchi Inc., we combine hands-on expertise with engineering insight to deliver smart, sustainable solutions—on time and within budget. Whether it’s a custom home, commercial facility, or industrial environment, we power your vision with professionalism and quality you can trust.

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  • HVAC contractor in Thornhill, Ontario
    • Best of the Best 2022
    • Best of Awards 2022

    Northwest Gas is a fully licensed company specializing in sales, installation, servicing and repair of residential and commercial heating and air conditioning equipment.Servicing the GTA's heating and cooling needs since 1985. At Northwest Gas Ltd we build our reputation on providing dependable superior quality products and service to the consumer at competitive prices. Northwest Gas Ltd. operates in a professional manner and will treat your property with the respect it deserves.

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  • HVAC contractor in Thornhill, Ontario

    Avenue Air Systems is a trusted HVAC company specializing in residential heating and cooling services. We provide professional installation, repair, replacement, and maintenance for home comfort systems, helping homeowners stay comfortable throughout every season. Our team is experienced in servicing and installing furnaces, central air conditioners, heat pumps, and home ventilation systems. Whether you need a new furnace installation, air conditioner repair, heat pump service, or seasonal HVAC maintenance, Avenue Air Systems delivers reliable and efficient solutions tailored to your home. We understand how important a properly functioning HVAC system is for your family’s comfort and energy efficiency. That’s why we focus on high-quality workmanship, dependable service, and energy-efficient heating and cooling systems that help reduce energy costs and improve indoor air quality. At Avenue Air Systems, we take pride in providing honest recommendations, professional service, and lasting results. From emergency furnace repairs in the winter to air conditioner installations in the summer, homeowners can rely on our skilled technicians to get the job done right. Our Residential HVAC Services Include: • Furnace installation and furnace repair • Air conditioner installation and AC repair • Heat pump installation and service • HVAC system replacements and upgrades • Seasonal HVAC maintenance and tune-ups • Home ventilation and indoor air quality solutions When you choose Avenue Air Systems, you’re choosing a company committed to comfort, efficiency, and customer satisfaction. Contact us today for dependable home heating and cooling services you can trust.

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4.8

Top rated HVAC contractors

Our HVAC contractors in Thornhill, Ontario, are rated 4.8 out of 5 based on 441 reviews from homeowners like you.

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What services are offered by HVAC contractors and companies in Thornhill, Ontario?

HVAC contractors and companies in Thornhill, Ontario provide a range of services to keep your indoor environment comfortable year-round.

Popular HVAC services in Thornhill, Ontario include:

  • Fitting air cleaners and humidifiers to improve indoor air quality

  • Setting up a solar water heater to provide energy-efficient, sustainable hot water for your home or business

  • Repairing or replacing water heaters to ensure reliable hot water supply

  • Installing or servicing furnaces and heat pumps to ensure reliable heating during harsh winters

  • Upgrading or replacing air conditioning systems to keep indoor spaces cool, comfortable, and energy-efficient

  • Modernizing boilers to provide consistent heating and hot water while improving energy efficiency and system reliability

Searching for heating and air conditioning contractors in Thornhill, Ontario? Save yourself time and by posting your project on HomeStars. Compare profiles and request quotes from your preferred Thornhill, Ontario HVAC contractors and companies before making your final hiring decision.

What are the average costs of HVAC services in Thornhill, Ontario?

When hiring HVAC services in Thornhill, Ontario, prices vary depending on the type of system and the complexity of the installation or repair. Typical labour charges for furnace installations often run between $75 and $150 per hour, with most installations requiring 8 to 16 hours of work.

For a full heating/cooling system installation, homeowners generally pay between $4,000 and $7,500 for standard systems.

For common HVAC jobs in Thornhill, Ontario, expect to pay:

Find heating and cooling contractors in Thornhill, Ontario on HomeStars

Finding HVAC contractors and companies in Thornhill, Ontario doesn’t have to be stressful. Just post your project on HomeStars’ free and easy to use platform, and we’ll match you with pros ready to help.

How to hire Thornhill, Ontario heating and air conditioning contractors on HomeStars:

  1. Start by posting your project. Provide a clear description of your heating and cooling requirements and include photos to get precise quotes.
  2. Compare profiles, browse previous work history and get quotes from HVAC contractors and companies in Thornhill, Ontario.
  3. Connect with multiple HVAC contractors in Thornhill, Ontario to discuss your project, request quotes and ask any questions.
  4. Hire the right pro to get the job done and leave a review based on your experience. Our review system ensures that pros are rewarded for good work and held accountable for any problems.

All of the HVAC contractors and companies in Thornhill, Ontario who register with our platform undergo verification, including ID and company checks, so you can hire with confidence and peace of mind through HomeStars.

What to ask an Thornhill, Ontario HVAC contractor before hiring?

Looking for a HVAC contractor in Thornhill, Ontario? These questions can help you find a pro who’s the right fit for your heating, cooling, or ventilation project.

Are you licensed and insured in Thornhill, Ontario?

Most HVAC work, especially gas, boiler, or high-capacity heating systems, requires pros to be licensed. Ask your preferred HVAC contractors in Thornhill, Ontario for proof of licences and liability insurance to protect yourself in case of accidents or damage.

Will you handle permits and inspections if required?

Some HVAC installations or replacements, like gas-fired boilers, require municipal permits and inspections. Confirm the Thornhill, Ontario HVAC company will handle this so your installation is compliant.

What types of HVAC systems do you work on?

Some Thornhill, Ontario HVAC contractors specialize in furnaces, boilers, air conditioning, or heat pumps. Confirm they have experience with your system type to ensure proper installation or repair.

Do you offer maintenance or service plans?

Regular maintenance improves efficiency and extends system life. Check if your Thornhill, Ontario HVAC contractor offers annual inspections, filter changes, or seasonal tune-ups as part of a service plan.

How do you handle unexpected issues during installation?

Older homes or complex systems can reveal surprises, like outdated wiring or plumbing conflicts. Ask your heating and cooling contractor in Thornhill, Ontario how they communicate additional costs or changes to avoid surprises.

FAQ: Common questions about HVAC in Thornhill, Ontario

Can HVAC companies in Thornhill, Ontario remove old equipment?

Many Thornhill, Ontario HVAC companies include removal and disposal of old units as part of the installation service, though it’s best to confirm in advance.

How long do HVAC installations by Thornhill, Ontario HVAC contractors typically take?

Installation times vary depending on system type and home size. Furnaces or air conditioning systems usually take 1 to 2 days, while more complex setups may take longer.

Do heating and cooling contractors in Thornhill, Ontario offer energy audits?

Some Thornhill, Ontario HVAC contractors provide home energy assessments to identify ways to improve efficiency and reduce heating or cooling costs.

How do Thornhill, Ontario HVAC contractors handle refrigerant disposal?

Thornhill, Ontario HVAC contractors follow Canadian environmental regulations to safely recover, recycle, or dispose of refrigerants during air conditioning or heat pump servicing.

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