Company lists · Data refreshed September 2026

Top 25 Weatherization companies based in Canada

Name: Weatherization companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 622 companies tracked

RevenueBase identified 622 weatherization companies headquartered in Canada as of September 2026 and tracks 5,161 professional contacts across them, including 1,481 with verified work emails. Toronto is the largest hub.

This list covers weatherization companies headquartered in Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

622Companies

5,161Contacts tracked

1,481Verified emails

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The 25 largest weatherization companies based in Canada

Ranked by team size

Top 25 of 622 weatherization companies based in Canada, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to weatherization companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Reliance Home Comfort	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	1,001-5,000	1,565 contacts →
	Indirect evidence “As a leader in home services and energy efficient solutions for over 60 years, Reliance Home Comfort® (Reliance) is committed to being the Destination of Choice by delivering…” Source: RevenueBase Database · checked Sep 22, 2026
2	Greenfoot Energy Solutions	Indirect evidence	Moncton, NB, CanadaHQ checked Sep 22, 2026	501-1,000	206 contacts →
	Indirect evidence “Greenfoot Energy Solutions was established in 2014 by a group of energy experts dedicated to improving energy efficiency in Atlantic Canada.” Source: RevenueBase Database · checked Sep 22, 2026
3	Great Northern Insulation	Indirect evidence	Woodstock, ON, CanadaHQ checked Sep 22, 2026	201-500	127 contacts →
	Indirect evidence “Founded in 1980, Great Northern Insulation is Ontario's leading building envelope service provider, for the new construction and retrofit markets across commercial, institutional…” Source: RevenueBase Database · checked Sep 22, 2026
4	Ecoline Windows	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 22, 2026	51-200	93 contacts →
	Indirect evidence “We specialize in replacement windows for the residential market and work directly with homeowners.” Source: RevenueBase Database · checked Sep 22, 2026
5	Northern Dock Systems	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 22, 2026	51-200	72 contacts →
	Indirect evidence “Northern Docks Systems is an industry leader in the sales and service of energy-efficient products including air barriers, high-speed doors, HVLS Fans and loading dock equipment.” Source: RevenueBase Database · checked Sep 22, 2026
6	Lysair	Indirect evidence	Laval, QC, CanadaHQ checked Sep 22, 2026	51-200	63 contacts →
	Indirect evidence “Depuis 1987, Lysair se démarque par la qualité de ses projets et de ses services d’entretien en ventilation, climatisation et chauffage dans les secteurs résidentiels…” Source: RevenueBase Database · checked Sep 22, 2026
7	Simply Green Home Services INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	201-500	60 contacts →
	Indirect evidence “Simply Green offers a wide range of options to help you get equipped with reliable, top-quality, high-efficiency heating and cooling systems.” Source: RevenueBase Database · checked Sep 22, 2026
8	GNR Corbus	Indirect evidence	Sherbrooke, QC, CanadaHQ checked Sep 22, 2026	201-500	58 contacts →
	Indirect evidence “Que ce soit en climatisation, en ventilation, en réfrigération, en congélation, en plomberie, en chauffage ou pour les procédés de gaz naturel, nous avons un technicien qualifié…” Source: RevenueBase Database · checked Sep 22, 2026
9	PMC Energy Limited	Indirect evidence	Moncton, NB, CanadaHQ checked Sep 22, 2026	51-200	56 contacts →
	Indirect evidence “Considering over 40% of all energy is consumed by buildings, it is no wonder building managers and owners are becoming increasingly mindful of energy costs and usage.” Source: RevenueBase Database · checked Sep 22, 2026
10	Sustainable Projects Group SPG	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 22, 2026	11-50	53 contacts →
	Indirect evidence “Sustainable Projects Group is a design-build energy efficiency company working with industry leaders to help accomplish their energy savings goals by providing them with the…” Source: RevenueBase Database · checked Sep 22, 2026
11	Nerva Energy	Indirect evidence	Hamilton, ON, CanadaHQ checked Sep 22, 2026	51-200	50 contacts →
	Indirect evidence “Nerva Energy is an award-winning energy advisory firm, helping our clients to maximize their energy performance, decrease GHG emissions, and improve indoor air quality.” Source: RevenueBase Database · checked Sep 22, 2026
12	Great Canadian	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 22, 2026	11-50	44 contacts →
	Indirect evidence “Great Canadian sells energy-efficient, new-construction and renovation materials for homes and commercial properties.” Source: RevenueBase Database · checked Sep 22, 2026
13	Owens Corning Canada	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	n/a	42 contacts →
	Indirect evidence “If you’re looking for smart, energy-saving insulation solutions, you've come to the right place.” Source: RevenueBase Database · checked Sep 22, 2026
14	BMP Mechanical LTD	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 22, 2026	51-200	41 contacts →
	Indirect evidence “BMP Mechanical Ltd offers full service commercial and residential development services to customers throughout Calgary.” Source: RevenueBase Database · checked Sep 22, 2026
15	Duraclim	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 22, 2026	51-200	34 contacts →
	Indirect evidence “Chez DuraClim, nous sommes déterminés à garantir votre confort tout au long de l'année.” Source: RevenueBase Database · checked Sep 22, 2026
16	Landmark Home Solutions	Indirect evidence	Hamilton, ON, CanadaHQ checked Sep 22, 2026	201-500	32 contacts →
	Indirect evidence “Landmark Home Solutions has been supplying comfort and peace of mind to homeowners across Ontario since 1987.” Source: RevenueBase Database · checked Sep 22, 2026
17	Excel Climatisation	Indirect evidence	Longueuil, QC, CanadaHQ checked Sep 22, 2026	51-200	28 contacts →
	Indirect evidence “Dès sa création, Excel Climatisation inc.” Source: RevenueBase Database · checked Sep 22, 2026
18	1click Heating & Cooling	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	51-200	28 contacts →
	Indirect evidence “1Click Heating & Cooling offers a seamless, eco-friendly, and cost-effective solution for all your heating and cooling needs.” Source: RevenueBase Database · checked Sep 22, 2026
19	Scottish GAS Group INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	1-10	28 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
20	Enersavings INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	51-200	27 contacts →
	Indirect evidence “EnerSavings Inc is committed to providing a sustainable and tailored energy-saving solution, so our customers reduce operating expenses, eliminate maintenance, boost the…” Source: RevenueBase Database · checked Sep 22, 2026
21	Sigma Heating & Cooling	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 22, 2026	201-500	27 contacts →
	Indirect evidence “Sigma is an HVAC company founded in 1997, serving multiple market sectors.” Source: RevenueBase Database · checked Sep 22, 2026
22	Smartcool Systems INC	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 22, 2026	11-50	27 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
23	Solve Energy	Indirect evidence	Langford, BC, CanadaHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “Solve Energy is a local solar installation and energy efficient upgrade company.” Source: RevenueBase Database · checked Sep 22, 2026
24	Delta AIR Systems	Indirect evidence	Waterloo, ON, CanadaHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “An HVAC company located in Waterloo Ontario.” Source: RevenueBase Database · checked Sep 22, 2026
25	Finan Home Service	Indirect evidence	London, ON, CanadaHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “We work with home owners who are looking to upgrade their electricial, plumbing and heating & cooling systems, I partner with them to make a fit based on their specific needs and…” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: weatherization companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names weatherization companies.
Partial evidence: Its own public description names part of weatherization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name weatherization companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 622 weatherization companies based in Canada

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Weatherization companies based in Canada at a glance

As of Sep 22, 2026

28.7%Verified-email coverage

8.3Average contacts per company

1-10Median size (employees)

7.1%Largest-city concentration · Toronto

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

346

11-50

190

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 622 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among weatherization companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Canada whose own description of what they do matches “weatherization companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names weatherization companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among weatherization companies, and records with no verified work email. Companies headquartered outside Canada are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,481 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Weatherization companies by metro

Weatherization companies in Toronto44
Weatherization companies in Calgary29

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names weatherization companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many weatherization companies are there based in Canada?

RevenueBase identified 622 weatherization companies headquartered in Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Reliance Home Comfort, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most weatherization companies?

Toronto leads with 44 headquartered companies, followed by Calgary (29) and Mississauga (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,481 verified decision-maker contacts tracked across these 622 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.