Company lists · Data refreshed November 2026

Top 13 Hvac process piping construction services based in Ottawa, Canada

RevenueBase identified 25 company matches for hvac process piping construction services associated with Ottawa, Canada as of November 2026 and tracks 383 professional contacts across them, including 157 with verified work emails. Across Canada, Calgary is the largest hub for this category (95 companies); Ottawa has 25.

This list covers company matches for hvac process piping construction services associated with Ottawa, Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
25Companies
383Contacts tracked
157Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 13 largest hvac process piping construction services based in Ottawa, Canada

Ranked by team size
Top 13 of 25 company matches for hvac process piping construction services based in Ottawa, Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202651-20062 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202651-20045 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202611-5044 contacts →

Exact match

“Since 1986, we have been providing commercial, industrial and institutional piping, plumbing and heating services to Ottawa and Eastern Ontario.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202651-20035 contacts →

Exact match

“Climate Works is a leading mechanical service provider based in Ottawa, delivering professional heating, cooling, ventilation, and plumbing solutions to commercial, industrial…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Since 2013, Premium Construction has offered services across all sectors (Industrial, Commercial, and institutional) providing General Contracting, Construction Management and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202651-20016 contacts →

Exact match

“Baxtec Mechanical Services is a dynamic and growing commercial mechanical contractor in the Ottawa area.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“For over 90 years the Francis Plumbing & Heating team has continued to provide ongoing excellence in water services including plumbing, heating, radiant floor heating, boilers…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 20261-109 contacts →

Exact match

“Provide market leading products to the HVAC industry, backed by technical expertise and customer satisfaction.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Established in 3V Mechanical has been providing the National Capital Region with mechanical service for over 24 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Visit 2739 Carp Rd, Carp, Ontario, Canada for the best HVAC Ottawa has to offer.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchOttawa, CanadaHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Established in 2008, our company specializes in mechanical commercial/industrial thermal insulation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchOttawa, ON, CanadaHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Great North Heating is a small local business in Ottawa, Ontario.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 13 of 25 hvac process piping construction services based in Ottawa, Canada

See the full list, filter by size, metro and specialty, and access 157 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Hvac process piping construction services based in Ottawa, Canada at a glance

As of Nov 6, 2026
41.0%Verified-email coverage
15.3Average contacts per company
11-50Median size (employees)
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
10
11-50
8
51-200
6

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 25 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Ottawa, Canada whose business descriptions match “hvac process piping construction services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 157 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “hvac process piping construction services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hvac process piping construction services are there based in Ottawa, Canada?

RevenueBase identified 25 company matches for hvac process piping construction services associated with Ottawa, Canada as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Lar-Mex INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in Canada has the most hvac process piping construction services?

Calgary leads Canada with 95 company records, followed by Toronto (46) and Edmonton (44). Ottawa has 25.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 157 professional contacts with verified work emails tracked across these 25 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 25 hvac process piping construction services based in Ottawa, Canada. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.