Company lists · Data refreshed September 2026

Top 25 Hvac engineering firms based in Toronto, Canada

Name: Hvac engineering firms based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 111 companies tracked

RevenueBase identified 111 hvac engineering firms headquartered in Toronto, Canada as of September 2026 and tracks 3,038 professional contacts across them, including 1,673 with verified work emails. Toronto is the largest hub.

This list covers hvac engineering firms headquartered in Toronto, 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 16, 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 16, 2026 86% judged on-target in blind review

111Companies

3,038Contacts tracked

1,673Verified emails

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The 25 largest hvac engineering firms based in Toronto, Canada

Ranked by team size

Top 25 of 111 hvac engineering firms based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to hvac engineering firms: 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	HTS Engineering	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1,001-5,000	714 contacts →
	Indirect evidence “Your success is our success.” Source: RevenueBase Database · checked Sep 16, 2026
2	Smith Andersen	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	501-1,000	672 contacts →
	Partial evidence “What does it take to be one of Canada’s most respected integrated engineering firms?” Source: RevenueBase Database · checked Sep 16, 2026
3	MCW Group Of Companies	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	201-500	363 contacts →
	Partial evidence “Since 1964 the MCW Group has built a solid reputation for the delivery of Professional Consulting Engineering Services, Energy Management Services, and Engineering Development…” Source: RevenueBase Database · checked Sep 16, 2026
4	The Hidi Group	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	161 contacts →
	Indirect evidence “The HIDI Group (The HIDI Group Inc.) is a multi-disciplinary consultancy committed to delivering world-class solutions and unparalleled service.” Source: RevenueBase Database · checked Sep 16, 2026
5	Hammerschlag & Joffe INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	97 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
6	LRI Engineering	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	69 contacts →
	Partial evidence “Based in Toronto, LRI is Canada's preeminent Professional Engineering firm that specializes exclusively in fire protection engineering, Building Code consulting, emergency…” Source: RevenueBase Database · checked Sep 16, 2026
7	Simply Green Home Services INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 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 16, 2026
8	The Mitchell Partnership Inc. NOW BPA	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	59 contacts →
	Partial evidence “Founded in 1958 in Toronto, The Mitchell Partnership Inc.(TMP) is a mechanical building services consulting engineering practice.” Source: RevenueBase Database · checked Sep 16, 2026
9	Continual Energy INC	Indirect evidence	Toronto, CanadaHQ checked Sep 16, 2026	51-200	55 contacts →
	Indirect evidence “The team at Continual Energy Inc.” Source: RevenueBase Database · checked Sep 16, 2026
10	Inviro Engineered Systems LTD	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	51 contacts →
	Partial evidence “INVIRO is a full-service Canadian engineering firm specializing in mechanical and electrical systems, along with sustainability consulting.” Source: RevenueBase Database · checked Sep 16, 2026
11	FLŌ Energy Solutions Inc. By CES	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	37 contacts →
	Indirect evidence “FLō Energy Solutions, formerly CES, started in 1998 when a local supermarket retailer gave us a humidity problem to solve, and we solved it.” Source: RevenueBase Database · checked Sep 16, 2026
12	MAT 4site Engineers Limited	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	34 contacts →
	Partial evidence “MAT 4Site Engineers is a privately owned company located in the heart of the GTA that specializes in the design and engineering of Mechanical and Electrical building systems.” Source: RevenueBase Database · checked Sep 16, 2026
13	Xtra Mechanical Limited	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	29 contacts →
	Partial evidence “Xtra Mechanical Limited is Canada’s leading commercial HVAC provider, offering professional, responsive and safety-driven solutions to the complete product lifecycle, for single…” Source: RevenueBase Database · checked Sep 16, 2026
14	1click Heating & Cooling	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 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 16, 2026
15	Mcgregor Allsop Limited	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “Having the technical expertise and insight to conduct retrofit projects in established buildings without affecting the day-to-day business of occupants is our specialty.” Source: RevenueBase Database · checked Sep 16, 2026
16	Scottish GAS Group INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	28 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
17	Sigma Heating & Cooling	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	201-500	27 contacts →
	Partial evidence “Sigma is an HVAC company founded in 1997, serving multiple market sectors.” Source: RevenueBase Database · checked Sep 16, 2026
18	The Aquila Group	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial evidence “The Aquila Group is a mechanical and electrical engineering firm located at 40 University Ave, Toronto, Ontario, Canada.” Source: RevenueBase Database · checked Sep 16, 2026
19	Dael Thermal Group INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	21 contacts →
	Partial evidence “Complete industrial and commercial solutions: • Combustion • Refrigeration • Chillers • HVAC • Plumbing • Electrical • Turn-key Installations IMMEDIATE SERVICE.” Source: RevenueBase Database · checked Sep 16, 2026
20	Bold Engineering INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “Bold Engineering is an innovative consulting firm committed to providing a wide range of engineering services that are timely and cost-effective.” Source: RevenueBase Database · checked Sep 16, 2026
21	The Master Group LE Groupe Master	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “The Master Group/Le Groupe Master - EFI Concepts, a sales agency serving the heating, ventilating and air conditioning (HVAC) industry, offers quality equipment from many proven…” Source: RevenueBase Database · checked Sep 16, 2026
22	Mann Engineering	Strong evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	14 contacts →
	Strong evidence “Offering a broad range of consulting, engineering, procurement and construction services encompassing virtually all areas of the energy market, including HVAC, boilers, automation…” Source: RevenueBase Database · checked Sep 16, 2026
23	Applied Energy Systems INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Providing our customers with the most innovative Heating, Cooling and Air Quality solutions.” Source: RevenueBase Database · checked Sep 16, 2026
24	Thermo Cool Mechanical	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	13 contacts →
	Partial evidence “Since established in 1983 Thermo Cool Mechanical has been providing heating, air conditioning, and ventilation (HVAC) services all over the Greater Toronto Area.” Source: RevenueBase Database · checked Sep 16, 2026
25	Airgenuity INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Located in Toronto and servicing all of southern Ontario and Quebec, AirGenuity was founded in as an engineering and integration firm specializing in precision airflow in critical…” Source: RevenueBase Database · checked Sep 16, 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: hvac engineering firms. 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 hvac engineering firms.
Partial evidence: Its own public description names part of hvac engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hvac engineering firms. 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 111 hvac engineering firms based in Toronto, Canada

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Hvac engineering firms based in Toronto, Canada at a glance

As of Sep 16, 2026

55.1%Verified-email coverage

27.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Toronto

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole Canada list rather than for Toronto, so it is reported there. Company counts and contact totals on this page are exact for Toronto, over 111 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 hvac engineering firms, 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 Toronto, Canada whose own description of what they do matches “hvac engineering firms”. 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 hvac engineering firms), 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 hvac engineering firms, and records with no verified work email. Companies headquartered outside Toronto 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, 1,673 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 16, 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.

Hvac engineering firms by metro in Canada

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 hvac engineering firms, 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 hvac engineering firms are there based in Toronto, Canada?

RevenueBase identified 111 hvac engineering firms headquartered in Toronto, 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?

HTS Engineering, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most hvac engineering firms?

Toronto leads with 111 headquartered companies, followed by Calgary (97) and Mississauga (66).

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 1,673 verified decision-maker contacts tracked across these 111 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 16, 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.