Company lists · Data refreshed September 2026

Top 25 Weatherization companies worldwide

Name: Weatherization companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 13,849 companies tracked

RevenueBase identified 13,849 weatherization companies worldwide as of September 2026 and tracks 106,809 professional contacts across them, including 20,808 with verified work emails. The United States is the largest market and London the largest hub.

This list covers weatherization companies worldwide, 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. Country and city lists for weatherization companies follow the table.

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

13,849Companies

106,809Contacts tracked

20,808Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest weatherization companies worldwide

Ranked by team size

Top 25 of 13,849 weatherization companies worldwide, 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	Home Depot	Indirect evidence	United StatesHQ checked Sep 22, 2026	5,001-10,000	19,720 contacts →
	Indirect evidence “Energy Savings Installed For You Installation you can trust.” Source: RevenueBase Database · checked Sep 22, 2026
2	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
3	Truteam	Indirect evidence	Daytona Beach, FL, United StatesHQ checked Sep 22, 2026	10001+	1,561 contacts →
	Indirect evidence “TruTeam is the nation’s largest insulation installer and we also install fireplaces, gutters, garage doors and more.” Source: RevenueBase Database · checked Sep 22, 2026
4	Sears Home Improvement Products	Indirect evidence	Longwood, FL, United StatesHQ checked Sep 22, 2026	10001+	1,119 contacts →
	Indirect evidence “Sears Home Improvement Products and Services, a member of the Sears Holdings Corporation (NASDAQ: SHLD) family of companies, is one of America's largest home improvement companies…” Source: RevenueBase Database · checked Sep 22, 2026
5	Proxiserve	Indirect evidence	Levallois-perret, FranceHQ checked Sep 22, 2026	1,001-5,000	935 contacts →
	Indirect evidence “A major player in the energy transition and leader in home services, PROXISERVE provides its customers with innovative solutions enabling them to reduce their energy consumption…” Source: RevenueBase Database · checked Sep 22, 2026
6	Feenstra	Indirect evidence	Lelystad, NetherlandsHQ checked Sep 22, 2026	1,001-5,000	781 contacts →
	Indirect evidence “Sinds het ontstaan in 1947 is Feenstra marktleider in installatietechniek met een nationale dekking.” Source: RevenueBase Database · checked Sep 22, 2026
7	Kaefer Norway	Indirect evidence	Stavanger, NorwayHQ checked Sep 22, 2026	1,001-5,000	663 contacts →
	Indirect evidence “KAEFER is a part of the KAEFER Group, one of Europe’s largest construction companies.” Source: RevenueBase Database · checked Sep 22, 2026
8	Technitoit	Indirect evidence	Les Ponts De Cé, FranceHQ checked Sep 22, 2026	501-1,000	519 contacts →
	Indirect evidence “Notre groupe, premier fabricant-applicateur, est le spécialiste français de l'amélioration de l'habitat.” Source: RevenueBase Database · checked Sep 22, 2026
9	Posigen	Indirect evidence	St. Rose, LA, United StatesHQ checked Sep 22, 2026	501-1,000	507 contacts →
	Indirect evidence “PosiGen is the nation's leading residential solar and energy efficiency provider.” Source: RevenueBase Database · checked Sep 22, 2026
10	KBANE	Indirect evidence	Villeneuve-d’ascq, FranceHQ checked Sep 22, 2026	501-1,000	376 contacts →
	Indirect evidence “Kbane est la 1ère enseigne en France, dédiée à la maison performante.” Source: RevenueBase Database · checked Sep 22, 2026
11	Homeserve France	Indirect evidence	Lyon Cedex 7, FranceHQ checked Sep 22, 2026	501-1,000	366 contacts →
	Indirect evidence “Depuis près de 25 ans, HomeServe accompagne les particuliers vers une maison plus durable, plus sûre et plus économique.” Source: RevenueBase Database · checked Sep 22, 2026
12	Homeworks Energy, INC	Indirect evidence	Medford, MA, United StatesHQ checked Sep 22, 2026	201-500	356 contacts →
	Indirect evidence “At HomeWorks Energy, our mission is simple, literally: Energy Efficiency, Simplified.” Source: RevenueBase Database · checked Sep 22, 2026
13	ترشيد Tarshid	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 22, 2026	201-500	342 contacts →
	Indirect evidence “The National Energy Services Company (TARSHID) is a national company wholly owned by the Public Investment Fund (PIF).” Source: RevenueBase Database · checked Sep 22, 2026
14	Petro Home Services	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 22, 2026	1,001-5,000	339 contacts →
	Indirect evidence “We're America’s #1 local home heating oil and total home comfort services provider, with over 100 years experience helping customers save and keep comfortable at home.” Source: RevenueBase Database · checked Sep 22, 2026
15	Semper Solaris	Indirect evidence	El Cajon, CA, United StatesHQ checked Sep 22, 2026	501-1,000	337 contacts →
	Indirect evidence “Ranked #1 in Solar + Battery Installation in America by "Solar Power World" Go Solar American Style!#1 Veteran Owned Solar Company in California Solar Panels.” Source: RevenueBase Database · checked Sep 22, 2026
16	DER	Indirect evidence	Saint-louis, FranceHQ checked Sep 22, 2026	n/a	331 contacts →
	Indirect evidence “DER est une PME spécialisée dans le contrôle des bâtiments.” Source: RevenueBase Database · checked Sep 22, 2026
17	EFFY	Indirect evidence	Paris, FranceHQ checked Sep 22, 2026	201-500	292 contacts →
	Indirect evidence “Effy, spécialiste de l’efficience énergétique.” Source: RevenueBase Database · checked Sep 22, 2026
18	Remica	Indirect evidence	Madrid, SpainHQ checked Sep 22, 2026	501-1,000	279 contacts →
	Indirect evidence “Grupo Remica se crea en 1984 como empresa de instalación y mantenimiento de sistemas de calefacción, climatización y ACS.” Source: RevenueBase Database · checked Sep 22, 2026
19	PPF France	Indirect evidence	Sainte-Luce Sur Loire, FranceHQ checked Sep 22, 2026	51-200	267 contacts →
	Indirect evidence “Spécialiste reconnu de la vente de solutions énergétiques dans le domaine de la rénovation, la société PPF (Préservation du Patrimoine) bénéficie d’une forte réputation de qualité…” Source: RevenueBase Database · checked Sep 22, 2026
20	Arclima Engenharia	Indirect evidence	Cabo De Santo Agostinho, BrazilHQ checked Sep 22, 2026	201-500	265 contacts →
	Indirect evidence “A Arclima Engenharia é uma empresa brasileira especializada em Climatização, Refrigeração e Eficiência Energética (HVAC), com atuação em todo o território nacional.” Source: RevenueBase Database · checked Sep 22, 2026
21	Apex Energy Solutions	Indirect evidence	Zionsville, IN, United StatesHQ checked Sep 22, 2026	51-200	260 contacts →
	Indirect evidence “A pioneering dealer for next-generation windows and eco-friendly building products, Apex Energy Solutions serves homeowners who value and love the place they call home.” Source: RevenueBase Database · checked Sep 22, 2026
22	CMC Energy Services	Indirect evidence	Fort Washington, PA, United StatesHQ checked Sep 22, 2026	201-500	252 contacts →
	Indirect evidence “CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Source: RevenueBase Database · checked Sep 22, 2026
23	Star Group, LP	Indirect evidence	Woodbury, NY, United StatesHQ checked Sep 22, 2026	1,001-5,000	249 contacts →
	Indirect evidence “Star Group is a leading energy and related home services provider specializing in the sale of home heating products and services to residential and commercial customers.” Source: RevenueBase Database · checked Sep 22, 2026
24	Reliable Heating & AIR	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 22, 2026	201-500	231 contacts →
	Indirect evidence “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Source: RevenueBase Database · checked Sep 22, 2026
25	Tolin Mechanical Systems	Indirect evidence	Denver, CO, United StatesHQ checked Sep 22, 2026	201-500	220 contacts →
	Indirect evidence “Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.” 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 13,849 weatherization companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 20,808 reachable decision-makers.

Free signup · no credit card

View the full list →

Weatherization companies worldwide at a glance

As of Sep 22, 2026

19.5%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

0.5%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

7,582

11-50

4,738

51-200

998

201-500

174

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for weatherization companies are linked below.
What qualifies: Companies worldwide 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.
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, 20,808 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 location

31 lists · largest first

Every Weatherization companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 worldwide?

RevenueBase identified 13,849 weatherization companies worldwide 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?

Home Depot, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most weatherization companies?

The United States leads with 5,406 companies, followed by France (1,571) and the United Kingdom (872). Every weatherization companies list by country and city is linked on this page.

Which city has the most weatherization companies?

London leads with 71 headquartered companies, followed by Paris (71) and Houston (60).

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 20,808 verified decision-maker contacts tracked across these 13,849 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.

Ready to reach these companies? Verified emails and direct dials for all 13,849 weatherization companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.