How many HVAC and plumbing companies are in Waltham, MA?

The ProComfort Registry lists 10 heating, cooling and plumbing businesses serving Waltham: 10 offering HVAC and 1 offering plumbing (some do both).

What is the average Registry Score in Waltham?

Rated companies in Waltham average 63 out of 100. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.

Which companies are featured in Waltham for 2026?

ProComfort Registry features Leblanc Mechanical in Waltham. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.

How are Waltham companies ranked?

By Registry Score, with records confirmed by their owners listed first. See https://procomfortregistry.online/methodology for how the score is calculated.

Waltham, Massachusetts

HVAC & Plumbing Pros in Waltham, MA

10 businesses serve Waltham. Compare them by Registry Score — reputation, digital presence and reach — with owner-confirmed records listed first.

Pros: 10
Avg. score: 63
Featured: 1

Featured · 2026

Featured in Waltham

How companies are featured →

Strong

Leblanc Mechanical

Featured

Waltham, MA 4.3(47 reviews)

HVACHeatingA/CCommercial

(781) 899-3984 Website

Showing 1–6 of 6

Strong

Leblanc Mechanical

Featured

Waltham, MA 4.3(47 reviews)

HVACHeatingA/CCommercial

(781) 899-3984 Website

Strong

Kensington Mechanical

Waltham, MA 4.7(36 reviews)

HVACHeatingA/CCommercial

(888) 391-2500 Website

Established

Johnstone Supply

Waltham, MA 4.4(11 reviews)

HVACHeating

(781) 487-7777 Website

Established

Hickey's Plumbing & Heating

Waltham, MA 4.2(18 reviews)

HVACPlumbingHeating

(781) 726-0804 Website

Established

B & G Heating & Air Conditioning

Waltham, MA 4.1(18 reviews)

HVACHeatingA/C

(617) 924-0120 Website

Established

J J Hayes Oil Co Inc

Waltham, MA 4.1(14 reviews)

HVACHeatingA/C

(781) 893-7145 Website

Waltham at a glance

How many HVAC and plumbing companies are in Waltham, MA?: The ProComfort Registry lists 10 heating, cooling and plumbing businesses serving Waltham: 10 offering HVAC and 1 offering plumbing (some do both).
What is the average Registry Score in Waltham?: Rated companies in Waltham average 63 out of 100. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
Which companies are featured in Waltham for 2026?: ProComfort Registry features Leblanc Mechanical in Waltham. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
How are Waltham companies ranked?: By Registry Score, with records confirmed by their owners listed first. See https://procomfortregistry.online/methodology for how the score is calculated.