Company lists · Data refreshed September 2026

Top 19 Mechanical contractors industrial based in Ottawa, Canada

Name: Mechanical contractors industrial based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 30 companies tracked

RevenueBase identified 30 mechanical contractors industrial headquartered in Ottawa, Canada as of September 2026 and tracks 490 professional contacts across them, including 191 with verified work emails. Calgary is the largest hub.

This list covers mechanical contractors industrial headquartered in Ottawa, 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 17, 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 17, 2026 86% judged on-target in blind review

30Companies

490Contacts tracked

191Verified emails

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The 19 largest mechanical contractors industrial based in Ottawa, Canada

Ranked by team size

Top 19 of 30 mechanical contractors industrial based in Ottawa, Canada, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to mechanical contractors industrial: 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	Dilfo Mechanical	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	68 contacts →
	Partial evidence “Dilfo Mechanical Limited is one of Eastern Ontario’s largest mechanical contracting firms, specializing in the full range of services, from large-scale design-build projects to…” Source: RevenueBase Database · checked Sep 17, 2026
2	Lar-Mex INC	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	57 contacts →
	Indirect evidence “Lar-Mex with a staff of over 200 employees has been providing heating, ventilation, plumbing and air conditioning (HVAC) services to the National Capital region for over 30 years.” Source: RevenueBase Database · checked Sep 17, 2026
3	TPH Plumbing & Heating	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	40 contacts →
	Partial evidence “Since 1986, we have been providing commercial, industrial and institutional piping, plumbing and heating services to Ottawa and Eastern Ontario.” Source: RevenueBase Database · checked Sep 17, 2026
4	Alliance Engineering & Construction LTD	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	38 contacts →
	Strong evidence “Alliance offers Mechanical and Electrical Design and Construction services, providing integrated solutions across the industrial, commercial, institutional and high-rise…” Source: RevenueBase Database · checked Sep 17, 2026
5	Climate Works Heating, Cooling & Plumbing	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	35 contacts →
	Strong evidence “Climate Works is a leading mechanical service provider based in Ottawa, delivering professional heating, cooling, ventilation, and plumbing solutions to commercial, industrial…” Source: RevenueBase Database · checked Sep 17, 2026
6	Total Hvac	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “Total HVAC has been a leader in the supply of commercial heating, ventilation, and air-conditioning equipment in Eastern Ontario and Western Quebec for 25 years.” Source: RevenueBase Database · checked Sep 17, 2026
7	Anchor Home Comfort	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Anchor is a residential heating and cooling contractor specializing in replacement, repair and maintenance of home comfort systems.” Source: RevenueBase Database · checked Sep 17, 2026
8	Mechanical Contractors Association Of Canada	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	14 contacts →
	Strong evidence “The Mechanical Contractors Association of Canada is the unified voice of the mechanical contracting industry.” Source: RevenueBase Database · checked Sep 17, 2026
9	TL Mechanical INC	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	12 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
10	Baxtec Mechanical Services	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	51-200	11 contacts →
	Strong evidence “Baxtec Mechanical Services is a dynamic and growing commercial mechanical contractor in the Ottawa area.” Source: RevenueBase Database · checked Sep 17, 2026
11	3v Mechanical INC	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	9 contacts →
	Partial evidence “Established in 3V Mechanical has been providing the National Capital Region with mechanical service for over 24 years.” Source: RevenueBase Database · checked Sep 17, 2026
12	JD Swallow Heating And Cooling Contractors	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	7 contacts →
	Indirect evidence “Nearly fifty years ago we set out to make a different kind of service company.” Source: RevenueBase Database · checked Sep 17, 2026
13	Controls Depot	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “Provide market leading products to the HVAC industry, backed by technical expertise and customer satisfaction.” Source: RevenueBase Database · checked Sep 17, 2026
14	Thermal Insulation Association Of Canada	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	7 contacts →
	Strong evidence “The Thermal Insulation Association of Canada is the national industry association for contractors, distributors and manufacturers of commercial, industrial and institutional…” Source: RevenueBase Database · checked Sep 17, 2026
15	PSL Mechanical	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “For the last 10 years PSL has been one of Ottawa's most trusted mechanical services firms working with commercial and residential clients.” Source: RevenueBase Database · checked Sep 17, 2026
16	Thermal Systems Mechanical Insulation Services LTD	Strong evidence	Ottawa, CanadaHQ checked Sep 17, 2026	11-50	6 contacts →
	Strong evidence “Established in 2008, our company specializes in mechanical commercial/industrial thermal insulation.” Source: RevenueBase Database · checked Sep 17, 2026
17	Shouldice Mechanical	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	4 contacts →
	Indirect evidence “Visit 2739 Carp Rd, Carp, Ontario, Canada for the best HVAC Ottawa has to offer.” Source: RevenueBase Database · checked Sep 17, 2026
18	Rocque Mechanical Contracting INC	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	3 contacts →
	Partial evidence “Rocque Mechanical Contracting (RMC) was established in 1981 by the founder Richard (Dick) Rocque.” Source: RevenueBase Database · checked Sep 17, 2026
19	Great North Heating	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 17, 2026	1-10	1 contacts →
	Indirect evidence “Great North Heating is a small local business in Ottawa, Ontario.” Source: RevenueBase Database · checked Sep 17, 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: mechanical contractors industrial. 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 mechanical contractors industrial.
Partial evidence: Its own public description names part of mechanical contractors industrial, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mechanical contractors industrial. 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 19 of 30 mechanical contractors industrial based in Ottawa, Canada

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Mechanical contractors industrial based in Ottawa, Canada at a glance

As of Sep 17, 2026

39.0%Verified-email coverage

16.3Average contacts per company

11-50Median size (employees)

320.0%Largest-city concentration · Calgary

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 30 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 mechanical contractors industrial, 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 Ottawa, Canada whose own description of what they do matches “mechanical contractors industrial”. 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 mechanical contractors industrial), 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 mechanical contractors industrial, and records with no verified work email. Companies headquartered outside Ottawa 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, 191 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 17, 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.

Mechanical contractors industrial by metro in Canada

Mechanical contractors industrial in Calgary96
Mechanical contractors industrial in Edmonton55
Mechanical contractors industrial in Mississauga50
Mechanical contractors industrial in Toronto48
Mechanical contractors industrial in Montreal36
Mechanical contractors industrial in Quebec36
Mechanical contractors industrial in Winnipeg33
Mechanical contractors industrial in Burnaby32
Mechanical contractors industrial in Ottawa30
Mechanical contractors industrial in Brampton29
Mechanical contractors industrial in Saskatoon26
Mechanical contractors industrial in Surrey26

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 mechanical contractors industrial, 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 mechanical contractors industrial are there based in Ottawa, Canada?

RevenueBase identified 30 mechanical contractors industrial headquartered in Ottawa, 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?

Dilfo Mechanical, headquartered in Ottawa, tops this list with the largest team on record.

Which city has the most mechanical contractors industrial?

Calgary leads with 96 headquartered companies, followed by Edmonton (55) and Mississauga (50).

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 191 verified decision-maker contacts tracked across these 30 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 17, 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.