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If you’re looking for an HVAC contractor in Oshawa, we can help. HomeStars has a selection of Oshawa HVAC companies who are ready and eager to take on your project. Posting your project is easy and free, after which available pros can register their interest. Read reviews and receive and compare multiple quotes all in one place before hiring!

Some of our top rated hvac contractors in Oshawa

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  • Throne Plumbing & Gas Ltd, is a full service plumbing company. We have approximately 20 years of plumbing experience. Our goal is to provide our customers with a honest plumbing experience. Our way may not be the most inexpensive way, but it will be the right way. We provide service for Toronto (GTA), Durham region and the surrounding areas. We are looking forward to hear from you. MAIN SERVICES: • WATER LINE REPAIR REPLACEMENT • DRAIN LINE REPAIR REPLACEMENT SUMP PUMP & WELL PUMP REPAIRS • WATER PRESSURE ISSUES • LEAKING PIPES • FAUCET REPAIR & REPLACEMENT • BACKFLOW TESTING • HEATER REPAIR REPLACEMENT • GAS PIPING • DRAIN CLEANING SUMP PUMPS (LIBERTY, BARNES) SEWAGE EJECTOR PUMPS • RE CIRCULATION PUMPS (ARMSTRONG) • KITCHEN & BATH FIXTURES • FAUCETS RESIDENTIAL & COMMERCIAL • FOOD WASTE DISPOSERS • TOILETS RESIDENTIAL & COMMERCIAL HEATING SERVICES • HYDRONIC HEATERS • RADIANT IN-FLOOR HEATERS • HOT WATER TANKS AND TANKLESS HOT WATER • BOILERS AND FURNACES

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    • Best of Awards 2026
    • Best of Newly Listed 2024

    We are a truly local company focused on serving the Durham Region and surrounding area's since 2011. Our friendly and knowledgeable staff have decades of experience, we employ multiple managers who teach at the local HVAC trades school and are proud to say that we train the competition. At Walchuk Heating and Cooling you will experience top notch service from beginning to end, we provide multiple area's of expertise; from basic furnace and air conditioning needs, to more complicated boiler and radiant flooring systems. We are a proud premier Lennox dealer who offers the highest quality equipment and support. We adhere to all safety protocols, are a proud TSSA member and UA Local 787 Union Employer , all of our technicians are employee's as we don't use sub-contractors. Having trades people who are employed ensures the workmanship is top tier as the workers are held accountable for the work they do. As a dependable, trusted and truly local HVAC provider who provides true peace of mind and accountability for the work we do. Walchuk Heating and Cooling is always available, 24/7 to assist our customers new and existing. Contact us anytime to book a service call, or free in home estimate or to learn more about how we can improve your home comfort today.

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  • Enerline Inc. Heating And Air Conditioning is a Toronto based HVAC contractor, Flooring Contractor, Electrician, Handyman, Landscaping Company, Carpenter, Plumber, Cleaning company, Appliance repair specialist, Pool company, Home Inspector, Renewable Energy Specialist, Home Electronics Specialist, Fireplace and BBQ Specialist, Refrigeration specialist, Tiler, Excavation Specialist, Roofing specialist & Architect company. Our goal is to provide quality service and excellent workmanship to our customers. If you need help with install or replace heating systems, install or replace airconditioning, install or replace solar pv panels, repair or maintain solar pv panels, install or replace floor heating, install or replace gas systems and pipes, install or replace boiler, repair or maintain boiler, repair or maintain floor heating, install or replace radiators, install or replace thermostats, repair or maintain airconditioning, repair or maintain heating system, install or replace ventilation system, install or replace heatpump, install solar water heater, repair or maintain heatpump, repair solar water heater, install or replace mist-generating system, install or replace cold room, install or replace whirlpool, spa and wellness, energy audit, clean air ducts & vents, install or repair water heaters, water or fuel tanks & air cleaners and humidifiers, message us so we can assist you and arrange a quote.

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  • Davies Plumbing and Home Solutions provides reliable plumbing and home repair services across the GTA. Led by a Red Seal licensed plumber, we focus on quality workmanship, honest advice, and lasting solutions. Our goal is simple: dependable service and repairs done right the first time.

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  • HVAC contractor in Oshawa

    EL’S WORK is a precision‑focused home improvement and repair service delivering reliable craftsmanship across Oshawa the Durham Regionand the GTA. Rooted in your strengths in Painting, Drywall Installation & Patching, Furniture Assembly & Disassembly, Mounting of Picture Fames and Television, Power Washing, Cleaning and Light Plumbing, the company is built on a simple promise: clean work, correct work, and work done with pride..

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  • Wizard Electrical Contracting is a Oshawa based HVAC contractor, Electrician, Handyman, Bathroom Renovation Company, Appliance repair specialist, Interior designer, Renewable Energy Specialist, Home Electronics Specialist & Plumber company. Our goal is to provide quality service and excellent workmanship to our customers. If you need help with install or repair electrical system, install or repair electrical sockets and switches, install or replace radiators, put up lighting, various small jobs, install or replace ev charger, install smart home automation, electrical inspections & pat testing, ceiling fan, install or repair bath exhaust fan, install or repair generator & interior lighting design plan, message us so we can assist you and arrange a quote.

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  • HVAC contractor in Oshawa

    Platinum Gas is a TSSA-certified natural gas and propane specialist serving Bowmanville, Durham Region, and the GTA. Led by certified G2 gas fitter Reilly Morrison, we deliver custom fireplace installations, outdoor fire features, pool heaters, gas line services, and appliance conversions. We operate under the Platinum Standard—exceeding industry norms with precision craftsmanship and bespoke solutions tailored to your space. From residential fireplaces to commercial gas systems, we provide safe, beautiful, and lasting results backed by full TSSA certification. Free estimates available.

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  • HVAC contractor in Oshawa

    Experienced HVAC and Electrical, Plumbing Engineer with over 10 years of HVAC experience. Skilled in troubleshooting and diagnostic repairs. Can also install and service all refrigeration based systems. Handyman service available.

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  • HVAC contractor in Oshawa

    Durham Pro Handyman provides reliable, affordable, and professional handyman services across Oshawa and Durham Region. We specialize in drywall repair, painting, TV mounting, bathroom repairs, trim work, plumbing fixture installation, door repairs, furniture assembly, caulking, and general home maintenance. We take pride in fast response times, clean workmanship, fair pricing, and dependable service. Whether you need a small repair or a full home improvement project, our goal is to make the process easy, stress-free, and completed right the first time. Homeowners choose Durham Pro Handyman for honest communication, attention to detail, and quality results they can trust. Serving Oshawa, Whitby, Ajax, Pickering, Bowmanville, and surrounding areas. Free estimates available. Same-day and emergency services offered.

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  • At Elite Renovations Plus, we are dedicated to providing reliable, high-quality services for all your home and property needs. With a focus on professionalism and attention to detail, our experienced team is equipped to handle everything from minor repairs to extensive renovations. We take pride in our craftsmanship and commitment to customer satisfaction, ensuring that each project is completed to your expectations. Whether you need interior or exterior services , trust Elite Renovations Plus to keep your space in top condition. Your home is our priority.

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  • Professional Plumbing & Drain Services has been operating for over 30 years and has extensive experience across residential, commercial, and construction environments. I am a licensed plumber and throughout my career, I have handled a wide range of responsibilities including:- major projects involving water lines, drainage systems, fixture installations, as well as completing full-system installations for new buildings and renovations. Over the years, I’ve earned a reputation for reliability, safe work practices, and consistently delivering high-quality workmanship that meets code requirements and client expectations. Special Skills & Expertise Installation, repair, and maintenance of residential and commercial plumbing systems Pipefitting (copper, PEX, PVC, steel) Drainage and waste system installation and repair Water supply line installation and troubleshooting Fixture installation (toilets, sinks, faucets, showers, tubs, water heaters) Backflow prevention and testing Leak detection and repair Sewer line repair and snaking Reading and interpreting blueprints and technical diagrams Rough-in and finish plumbing for new construction Strong problem-solving and troubleshooting skills Excellent customer service and communication Reliable, punctual, and detail-oriented

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  • 25+years experience! Whether you need a simple faucet installation or complete drain line replacement, we offer a wide range of commercial and residential plumbing services to meet your needs. We continually strive to exceed expectations by ensuring that each client receives the very best service. Domestic Waterline,Drain Repair or Install Backflow Prevention Install & Testing Electrical Hot Water Tank Installs & Drain Snaking.

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  • HVAC contractor in Oshawa

    Renoviq Fix & Build is a reliable home renovation and improvement company serving Toronto, the GTA, Durham Region, York Region, and surrounding areas. We specialize in fencing, decks, flooring, drywall installation and repair, painting, trim and finish carpentry, doors, concrete work, demolition, and general home repairs. Our team is committed to quality workmanship, honest pricing, clear communication, and completing every project on time. We treat every home with care and work closely with our customers to deliver results that meet their expectations. Whether you need a small repair or a complete renovation, you can count on Renoviq Fix & Build for dependable, professional service. Free estimates are available.

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  • SolRise Construction Ltd is a professional Plumbing & Mechanical contractor serving Durham Region and the Greater Toronto Area. We provide reliable residential, commercial, and industrial plumbing services, including 24/7 emergency response, repairs, maintenance, installations, drain and sewer services, piping, and mechanical work. Our commercial services are designed for property managers, building owners, facility managers, general contractors, restaurants, retail locations, offices, warehouses, multi-residential properties, and industrial facilities. We are available for scheduled service, ongoing maintenance, project work, and urgent plumbing emergencies. At SolRise, we understand that plumbing and mechanical problems can disrupt operations and create costly damage. Our focus is on responsive service, clear communication, professional workmanship, and practical solutions that address the problem correctly and efficiently. We work with clients who need a dependable contractor they can call for everything from routine plumbing repairs and maintenance to larger commercial projects and emergency service. SolRise is also available to work as a primary, secondary, or emergency plumbing contractor for property management and commercial organizations. Our services include commercial and residential plumbing, emergency plumbing, drain and sewer service, leak and pipe repairs, fixture installation and replacement, water lines, plumbing maintenance, mechanical piping, and plumbing installations and upgrades. Serving Oshawa, Whitby, Ajax, Pickering, Courtice, Bowmanville, Clarington, Durham Region, and surrounding GTA communities. SolRise Construction Ltd — Plumbing & Mechanical. Professional service. Reliable response. Quality workmanship.

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    • Best of Newly Listed 2022

    We are a full service building maintenance company with over 20+ years of collective experience. Our professional & licensed contractors are available for routine maintenance and renovation work. Contact us for a free quote on kitchen & bathroom work. We do it all, from small jobs to large renovations.

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  • At Marquis Mechanical, we take pride in providing dependable, high-quality plumbing services to homes and businesses throughout Bowmanville and the surrounding area. Whether it’s a leaky faucet, a clogged drain, or a new fixture installation, we’re ready to help — promptly and professionally. We’re a locally owned company built on honesty, craftsmanship, and customer care. Our goal is simple: to make sure every customer feels confident knowing their plumbing is in good hands. If you’re in Bowmanville and need trusted plumbing service or maintenance, call Marquis Mechanical today — where quality work and reliable service come standard.

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4.9

Top rated HVAC contractors

Our HVAC contractors in Oshawa, are rated 4.9 out of 5 based on 193 reviews from homeowners like you.

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What services are offered by HVAC contractors in Oshawa?

Oshawa HVAC companies offer a range of solutions to keep homes and offices comfortable year-round. They provide heating, cooling, and ventilation services to ensure indoor air quality and consistent temperature control, whether for snowy, cold winters or warm, humid summers typical in Oshawa.

Here are some of the most common services offered by HVAC companies in Oshawa:

  • Heating services: Installation, maintenance, and repair of furnaces, boilers, and heat pumps.
  • Air conditioning services: Installation and servicing of central AC and ductless systems.
  • Ventilation services: Various systems that manage seasonal humidity swings, help prevent condensation, and maintain balanced airflow in many Oshawa homes.
  • Indoor air quality solutions: Whole-home humidifiers, dehumidifiers, and air filtration systems to reduce allergens, manage Oshawa’s summer humidity and winter dryness.

It’s easy to get your Oshawa HVAC needs sorted on HomeStars. Just post your project, and local HVAC companies will register their interest. If you prefer, you can visit our directory of HVAC contractors to connect with pros directly.

What makes hiring HVAC contractors in Oshawa unique?

Oshawa HVAC contractors understand the city’s seasonal swings, from cold, snowy winters to hot, humid summers influenced by Lake Ontario. They know how to select and install systems that perform reliably year-round while addressing local building conditions and energy requirements.

  • Winter reliability: Extended cold spells and occasional ice storms can affect performance and efficiency of various kinds of heating systems. It’s important to ensure systems are properly sized and installed for consistent warmth.

  • Humidity management in summer: Oshawa summers can bring high humidity, which may cause indoor discomfort or mould growth. Local HVAC contractors can design and/or install systems that focus on balancing ventilation, dehumidification, and air conditioning.

  • Older home considerations: Many Oshawa homes have older ductwork or building layouts. Adapting installations and developing maintenance strategies helps systems to work efficiently with existing structures.

  • Local permit and code compliance: Significant system upgrades, gas lines, or ductwork modifications may require municipal building permits and inspections. Oshawa HVAC contractors can handle these to ensure work meets local regulations.

Find heating contractors in Oshawa on HomeStars

Finding heating contractors in Oshawa doesn’t have to be hard. HomeStars takes the cold-calling and endless searching out of the process, saving you both time and energy. Just follow these simple steps:

  1. Start by posting your project on HomeStars. Provide a clear description of your HVAC needs and, if possible, include photos to get precise quotes.
  2. Receive interest from available pros, review work history, and read customer feedback for HVAC pros in Oshawa.
  3. Connect with HVAC contractors in Oshawa to discuss your project, request and compare 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 HVAC pros are rewarded for good work and held accountable for any problems.

When joining HomeStars, pros undergo checks at registration - such as ID documents, company details, certifications for regulated jobs and skill assessments - allowing you to hire with confidence.

Extra peace of mind with the HomeStars Confidence Program

The HomeStars Confidence Program is designed to give you added confidence when hiring through our platform. If your job qualifies under the Program and we determine that a claim meets the Program requirements, HomeStars may cover what you owe the Pro on an eligible job with a quote of up to CAD $10,000, in line with our terms and conditions.

What are the average costs of HVAC services in Oshawa?

The costs of HVAC services in Oshawa vary based on the type of system, the work required, and whether it’s an emergency or after-hours service. Hourly rates typically range from $85 to $140 during regular business hours, while emergency or weekend service can nearly double the cost.

Here are some typical costs for common HVAC services in Oshawa:

  • Furnace installation: about $4,000 – $7,000 for a high‑efficiency gas furnace installed.

  • Air conditioner installation: generally $4,000 – $7,000 for a central AC system.

  • Heat pump installation: around $4,200 – $7,800, with ductless systems on the lower end and larger capacity units on the higher end.

  • Ventilation services: duct cleaning often ranges from $300 – $600, while installing an HRV or ERV system can cost approximately $1,800 - $4,500 depending on home size and ductwork requirements.

  • Heating system maintenance or inspection: routine service visits, including filter changes and system checks, usually cost about $90 - $275.

For more detailed information on costs to expect, our guide to heating and cooling costs in Oshawa should help.

HomeStars Tip: We suggest that you clarify with your Oshawa heating contractor what’s included in their estimate, and that you request everything be detailed in a written quote. This supports transparency and avoids misunderstandings.

What to ask an HVAC company in Oshawa before hiring?

Before hiring an HVAC company in Oshawa, it helps to ask key questions to ensure the work is safe, compliant, and suited to your home’s needs.

Are you licensed and insured in Oshawa?

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

Will you handle permits and inspections if required?

Many HVAC installations in Oshawa, such as furnace replacements, gas lines, or boiler systems, require permits and inspections under provincial and municipal regulations. Confirming that your preferred Oshawa HVAC contractor will manage permits and inspections helps ensure the work meets local codes and safety standards.

What types of HVAC systems do you work on?

Some Oshawa 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 Oshawa HVAC contractor offers annual inspections, filter changes, or seasonal tune-ups as part of a service plan.

What system do you recommend for the most cost‑efficient heating in typical Oshawa homes?

Oshawa’s mix of older and newer houses means energy use can vary widely. Asking this helps you understand whether a heat pump, high‑efficiency furnace, or hybrid setup offers the best long‑term operating cost for your specific property.

How will you tailor airflow and ductwork for energy efficiency in my home?

Many Oshawa homes have uneven heating or airflow due to legacy duct layouts or room additions. This question checks whether the contractor plans to optimize ducts, zoning, or dampers to reduce wasted energy and improve comfort.

FAQ: Common questions about HVAC services in Oshawa

Can an Oshawa heating contractor help me decide which system is best for my home?

Yes. Oshawa HVAC contractors understand the city’s cold winters, humid summers, and typical home layouts. They can recommend the right furnace, heat pump, or hybrid system for your property, and you can easily connect with local HVAC contractors in Oshawa through HomeStars.

How can HVAC systems handle humidity near Lake Ontario in Oshawa?

Homes near Lake Ontario can experience higher summer humidity and rapid temperature changes. Oshawa HVAC contractors can size systems appropriately and recommend dehumidification or ventilation solutions to maintain comfort and protect indoor air quality.

What HVAC solutions work for older homes with limited attic or crawl space access in Oshawa?

Many older Oshawa homes have tight spaces or outdated ductwork, which can complicate upgrades. HVAC contractors can suggest ductless systems, compact units, or other retrofit options that improve heating and cooling without requiring extensive structural changes.

Do Oshawa HVAC contractors offer energy audits?

Some Oshawa HVAC contractors provide home energy assessments to identify ways to improve efficiency and reduce heating and cooling costs. These audits often consider Oshawa’s cold winter temperatures, humid summers, and building characteristics, recommending insulation, ventilation, or system upgrades tailored to local conditions. On HomeStars, you can easily find Oshawa-based HVAC contractors for audits that focus on heating and cooling, or you can find home inspectors near you for a full home audit.

Can HVAC companies in remove old equipment?

Many Oshawa HVAC companies include removal and disposal of old units as part of installation services. They ensure that outdated furnaces, boilers, or heat pumps are safely transported and disposed of according to Ontario’s environmental regulations. Confirm with your Oshawa HVAC contractor in advance whether removal is included in their services.

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