Comfort Zone Insulation
- Spray Foam
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- Attic
24 companies listed · 4 in Perth · 11 open 24/7 · 12 open weekends · 23 rated 4.5+
Data verified October 18, 2026
The 24 companies listed for Perth, ON handle furnaces and heat pumps in winter and the cooling side in summer. Profiles repeat what each firm publishes about hours, licensing and brands, with ratings and review quotes gathered from public reviews.

Of the 24 companies we list here, 4 are in Perth itself and 20 come from towns including Ottawa (5), Smiths Falls (3) and Carleton Place (2). The companies on this page are rated from 4.2 to 5.0 across 2,980 reviews; 13 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), responsiveness (81%) and quality (80%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "cleanliness". 11 are open around the clock; 12 are open on Saturdays and 11 on Sundays. 3 show a licence on their websites. 11 have ten or more years of experience, the longest 40 years. 12 offer emergency call-outs; 5 offer financing or payment plans; 14 give free estimates; 4 are family- or locally-owned and 4 list coupons or special offers. We have a website on file for 23 of the companies on this page; 23 publish a contact page; 16 list a public email and 3 take bookings online. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Round the clock cover is stated in 11 of the 24 listings here. On a winter night that call is worth making early, because a house left without heat can freeze pipes before morning. Expect a temporary fix and a return visit once parts are available.
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