Stay Warm This Winter with Your Local HVAC Experts

Cornwall
Serving Eastern Ontario
Heating & cooling services for
Eastern Ontario for 76+ years.
100% Satisfaction Guarantee
We guarantee your install or repair
or we’ll make it right!
4.9+ Star Rating
We have hundreds of positive
customer reviews.
Shawn lapier HVAC Service Technician

We Do It Right,
The First Time

Your home or commercial building is a huge investment and should be respected like one, trust ATEL to give you the expert heating and cooling repairs you deserve.

Repairs in Hours not Days
Up Front
Pricing
Whisper Quiet Guarantee
76+ Years in Business
Prompt & Reliable
Expert Service

Our Services

We serve most of Eastern Ontario including Kemptville, Brockville, Metcalfe, Cornwall, Prescott, Manotick, Morrisburg and more!

Our Promise To You

ATEL Air is a Trane Comfort Specialist

How It Works

From the first call to installation and maintenance, we’re with you every step of the way.

Contact ATEL Air
Call us or request a quote online—we’re ready to assist with all your HVAC service or installation needs.
Book an Appointment
We’ll schedule a visit and provide a 2-hour arrival window. You’ll also receive a text confirmation with your technician’s details.
On-Site Service
Our expert team will arrive on time to assess, repair, or install your system with care. For new systems, we provide a range of pricing options to fit your needs.
Support and Maintenance
We provide regular maintenance and tune-ups to extend the life of your HVAC system and prevent costly repairs down the road.

Customer Reviews

home comfort tips

Triangle Tube has ceased operations, leaving boiler owners in Eastern Canada without warranty support or reliable access to replacement parts. Learn what this closure means for your home heating system and discover trusted boiler alternatives available through ATEL Air.

When Canadian winters bring temperatures well below freezing, choosing the right heating system becomes crucial for both comfort and cost-effectiveness. While most homes rely on natural gas furnaces, oil heating, or electric baseboard systems, rising energy costs are driving homeowners to explore more efficient alternatives. The geothermal vs. heat pump debate has become one of […]

At ATEL Air, we take pride in being a Canadian-owned and operated company, committed to quality service and supporting local businesses.  By working with manufacturers that have a strong presence in Canada, we help ensure reliable home comfort solutions while contributing to our national economy. Our Commitment to Canadian Excellence We are proud to partner […]

Frequently asked Questions

Are there rebates for heating and cooling services in Eastern Ontario?

Yes, some government and utility companies offer rebates for energy-efficient heating and cooling systems, including heat pumps, water heaters and other HVAC equipment. Check with your local utility or visit our promos page for the latest offers.

Do you offer financing?

Yes, we offer flexible financing options to make upgrading your equipment affordable. Contact us to learn about payment plans and special offers available for new installations.

What guarantee do you offer on your HVAC repairs and installs?

We provide a guarantee on all repairs and installations, ensuring peace of mind and reliable service. Warranty and guarantee depends on the service or equipment.

Should I repair or replace my AC?

The answer often depends on how old it is. If your AC is about 15 years old, you should start planning to replace it anyway. The good news is that today’s air conditioning systems are a lot more efficient, so replacing an old AC can mean a lot less money going to electricity every month. Considering that Ontario has the fastest rising electricity rates in North America, it can make a difference. If your air conditioner is on its last legs (e.g. a failed or noisy compressor, leaking coil, or other issues) it makes more financial sense to buy a new one. In the end it will depend on the cost of AC repair VS the cost of replacement (minus the energy savings and any rebates you can get).

Are heat pumps a good choice for Eastern Ontario’s cold winters?

Yes, modern cold-climate heat pumps are engineered to perform efficiently even when temperatures drop to -25°C and below—perfect for Eastern Ontario winters. Heat pumps provide both heating and cooling, potentially replacing your furnace and AC with one system. We install and service cold-climate heat pumps throughout Kemptville, Cornwall, Brockville, Embrun, Manotick, and surrounding areas. With rebates up to $3,100 currently available, it’s a great time to consider a heat pump upgrade.

What does a heat pump installation involve and cost?

A heat pump installation starts with an in-home assessment by one of our Comfort Advisors. We evaluate your home’s size, insulation, existing ductwork, and heating needs to recommend the right system. Most installations are completed in one to two days.

The cost depends on your home’s layout, the type of heat pump, and whether any electrical or ductwork upgrades are needed. We provide upfront pricing, Financing is available, and you may qualify for rebates. Contact us or request a quote online to get started.

What’s the benefit of choosing a local HVAC company?

Eastern Ontario has unique challenges that require local expertise. Our region is filled with 100+ year old stone farmhouses, heritage homes with original ductwork, and rural properties without natural gas access. As local HVAC installers, we understand these situations because we work with them every day. We know which homes need propane solutions, how to properly insulate ductwork in century-old attics, and why static pressure testing is critical in homes with undersized original ductwork. We’ve provided heating and cooling in Ontario since 1949, and our technicians live in the communities we serve—Kemptville, Brockville, Cornwall, Manotick, Morrisburg. When you call, you speak with our office staff who know your home’s history. We’re not dispatching technicians from Ottawa who’ve never worked on a stone farmhouse or dealt with the heating challenges of rural Eastern Ontario. We’re your neighbors, and we’re invested in getting it right.

When is the best time to install a new air conditioner?

Spring and early summer are the most popular times, with the best time being early spring. If your current AC is over 15 years old or needs frequent repairs, planning ahead before the summer rush is a smart move. Contact us for a free in-home assessment before the heat arrives.

Should I repair or replace my furnace?

Consider replacing your furnace if it’s over 15 years old, needs frequent repairs, or has become inefficient. A technician can assess whether repair or replacement is the better option. If your furnace has a red tag, our technician will also give an assessment if it’s correctly registered.

When should I replace my furnace, and what does installation involve?

Most furnaces last 15-20 years. Warning signs it’s time to replace include frequent repairs, uneven heating, rising energy bills, or unusual noises. When you contact us for furnace installation, we start with a home assessment to properly size the unit—this ensures efficiency and comfort. Installation typically takes one day, and we handle all permits and inspections. We serve homeowners throughout Manotick, Brockville, Kemptville, Cornwall, and all of Eastern Ontario.

How often should I have my furnace or AC serviced?

Your furnace and air conditioner should be serviced once a year. Regular maintenance catches small problems before they become expensive repairs, keeps your system running efficiently, and extends the life of your equipment.

Our Protection Plans make it easy to stay on schedule with priority booking, annual tune-ups, special discounts, and extended warranties.

Do you offer emergency heating service?

Yes, we provide emergency heating repair for homeowners in Eastern Ontario, including evenings and weekends. When your furnace fails in the middle of winter, our technicians respond quickly to get your heat restored. We understand that no-heat emergencies can’t wait, which is why we prioritize urgent calls and keep you informed on arrival times. Call us at 613-535-2720 if you need emergency heating service.

Why can’t you quote over the phone?

To install your HVAC system correctly, we must follow four different codes: gas code, electrical code, building code, and manufacturer installation requirements. We need to see your home to properly assess ductwork, insulation, existing equipment, and any safety concerns. Quoting over the phone without seeing these factors means we’d either overcharge you or install something that doesn’t work properly. Our thorough on-site assessments ensure you get a system sized and installed correctly the first time.

What areas do you service in Eastern Ontario?

We service most of Eastern Ontario – visit our locations page to see our full service area.

What payment methods do you accept?

We accept a variety of payment methods, including major credit cards (Visa and MasterCard), debit cards, and cash. Flexible financing options are also available for larger purchases.