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MacKay Heating & Cooling

HVAC Companies in St. Catharines, Ontario
Ranked #7 in St. Catharines | Grade B
4.80 (368 reviews)

MacKay Heating & Cooling

Local HVAC company providing installation, repair, and maintenance for heating, cooling, and hot water equipment with clear quotes and coordinated scheduling Serving homeowners across St. Catharines, Ontario.

MacKay Heating & Cooling business photo 1 - HVAC in St. Catharines
MacKay Heating & Cooling business photo 2 - HVAC in St. Catharines
MacKay Heating & Cooling business photo 3 - HVAC in St. Catharines
MacKay Heating & Cooling business photo 4 - HVAC in St. Catharines
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Why Homeowners Choose This Business

Local team with consistent customer feedback on clear communication, timely appointments, and efficient installations. Quotes are provided up front and work is coordinated to minimize downtime. Technicians explain findings and next steps before proceeding Local experience that helps homeowners across St. Catharines, Ontario compare a more region-aware provider.

Service Area

St. Catharines, Ontario and the Niagara region; contact the office to confirm service to your location.

Featured Local Business

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Listing details

This listing includes service information, customer review signals, a photo gallery, and public contact details to help homeowners compare this business more easily.

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  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Shows strong customer satisfaction signals based on review quality and volume.

Trust Signals

Emergency Service - After-hours assistance reported by customers; call to confirm immediate availability.

Services Covered

  Renovation Services
  Furnace Installation
  AC Repair
  Installations
  Heat Pump Installation
  Repairs
  Hot Water Tank Replacement
  Tankless water heater install
  Hvac Maintenance
  Emergency HVAC service
  Heating Repair
  Air Conditioning Installation
  Home HVAC Quotes
  Niagara HVAC Services
  St Catharines HVAC

Furnace and AC installation and replacement; Heat pump setup; Tank and tankless hot water installation; HVAC repairs and maintenance; Indoor comfort troubleshooting and quotes.

Reviews

Customer Reviews

Diane L
I found McKay's at the St Catharines Home Show back in 2014. We picked them because they were knowledgeable on the subject heat pumps - they installed a new furnace and heat pump for us a few months later - and we have been dealing with th…
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I found McKay's at the St Catharines Home Show back in 2014. We picked them because they were knowledgeable on the subject heat pumps - they installed a new furnace and heat pump for us a few months later - and we have been dealing with them ever since. Everyone we have dealt with has been extremely nice and more importantly, they all go out of their way to provide top quality service. It has been a pleasure dealing with everyone at MacKay Heating & Cooling, with much appreciation.
Jordan Alaimo
I contacted Mackay Heating & Cooling for a quote on a new hot water tank. Tyler arrived at our home within an hour and was very friendly and professional. He provided a detailed quote at no charge, which we really appreciated. We decided t…
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I contacted Mackay Heating & Cooling for a quote on a new hot water tank. Tyler arrived at our home within an hour and was very friendly and professional. He provided a detailed quote at no charge, which we really appreciated.

We decided to move forward with the installation, and Chris and Zack came the next day. They removed the old tank and installed the new one within a few hours. The whole process was smooth and efficient.

We’re very pleased with their work and the excellent service from the entire team. I would definitely recommend this company to anyone looking for reliable heating and cooling services.
Melissa Stoddart
I called at 930 pm for an emergency service call. The young man was very polite and thorough on the phone. He arrived on time. He explained clearly what he had done to assess the problem. Diagnosed and fixed the issue within an hour. Super…
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I called at 930 pm for an emergency service call. The young man was very polite and thorough on the phone. He arrived on time. He explained clearly what he had done to assess the problem. Diagnosed and fixed the issue within an hour. Super personable and very professional. I highly recommend this company.
Patrick Lynch
After doing initial research, found MacKay Heating & Cooling was top of recommended local companies for tankleess hotwater , HVAC service, installation and maintenance. After meeting with Fred for quotation, i was impressed with experience…
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After doing initial research, found MacKay Heating & Cooling was top of recommended local companies for tankleess hotwater , HVAC service, installation and maintenance. After meeting with Fred for quotation, i was impressed with experience and knowledge. This convinced me to go with them. When I phoned office to accept quote, the friendly office personnel quickly provided helpful service and advised a install date with expected time of arrival on date. On day of install a text message was sent by tech to advise they were on their way. The first tech Dave arrived at 8:03 to layout floor mats on exposed floor so they could not cause any mess while coming and going. As well to start drain of existing tank. Chris showed up shortly after and the removal of old and install went very well. A highly professional crew and final result was exceptional, piping for water, venting, natural gas and drainage were clean and square.
I highly recommend MacKay's team of professionals.
Pat Lynch, Grimsby, Ontario
Dennis Munn
One of those absolutely perfect service calls. A job extremely well done with a very knowledgeable, professional and pleasant technician. And as well a very pleasant and knowledgeable person at the end of the phone line when I booked this.…
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One of those absolutely perfect service calls. A job extremely well done with a very knowledgeable, professional and pleasant technician. And as well a very pleasant and knowledgeable person at the end of the phone line when I booked this. The quoted price when booking over the phone was exactly what I ended up paying.I highly recommend MacKay heating and cooling and the technician David.

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Special Offers

Same-Day Service

Same-day service may be available for certain jobs.

Emergency Service

Emergency service may be available for urgent issues.

Frequently Asked Questions

They work with furnaces, air conditioners, heat pumps, and hot water systems including tank and tankless units. Service includes repairs, maintenance, and full replacements depending on the condition of your equipment.

Customers often report same-day or next-day site visits for quotes. In many cases, pricing is provided on the spot or shortly after the visit so you can make a timely decision.

Reviews mention after-hours assistance and quick technician dispatch for urgent issues. Availability can vary by day and workload, so calling the main line is the fastest way to confirm.

Several customers describe next-day replacements after receiving a quote. Scheduling depends on stock and crew availability, but the team aims to coordinate installs promptly.

A technician will assess the system, explain the diagnosis, and review repair or replacement options. Work typically proceeds after you approve the estimate, and the team cleans up the area when finished.
 Verified Listing

Opening Hours

  • Monday Open 24 hours
  • Tuesday Open 24 hours
  • Wednesday Open 24 hours
  • Thursday Open 24 hours
  • Friday Open 24 hours
  • Saturday Open 24 hours
  • Sunday Open 24 hours

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Business Details

Business Rating
4.80 (368 reviews) Featured BusinessPro Listing
Address
2517 First Street Louth, St. Catharines, ON L2R 6P7, Canada, St. Catharines, ON L2R 6P7
Business Type
HVAC Contractor
Website
https://www.mackayheating.ca/
City Page
HVAC Companies in St. Catharines, Ontario

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