HVAC Contractors in St. Catharines, — 33 Local Contractors

There are 33 hvac contractors in St. Catharines, . The average rating is 4.5 out of 5 stars across 26 rated businesses. The highest rated is Reliance Heating, Air Conditioning & Plumbing (4.8 stars). The most reviewed is Reliance Heating, Air Conditioning & Plumbing with 3245 reviews.

Whether you need routine service or a major project, St. Catharines has qualified hvac contractors ready to help. Common services include furnace installation, air conditioning repair, heat pump setup, duct cleaning, and ventilation upgrades. To protect yourself, confirm HVAC certification, gas fitting license where applicable, and insurance coverage. Ontario's variable four-season climate play a role in scheduling and material selection, so hire someone who knows the area. Schedule maintenance before peak heating and cooling seasons for better availability. Compare your options below to find the right fit.

Planning a hvac project in St. Catharines?

Tell us what you need and local pros will get in touch. Free, no obligation.

Tired of calling around? Post your project once and let local pros come to you.

Frequently Asked Questions

How many hvac contractors are in St. Catharines?
There are 33 hvac contractors listed in St. Catharines, as of 2026.
What is the average rating?
The average Google rating for hvac contractors in St. Catharines is 4.5 out of 5 stars.
How do I choose a hvac in St. Catharines?
Compare ratings and review counts, verify their credentials and insurance, and get at least three quotes before hiring.