DW
Diane Walsh
Walsh Climate Systems · HVAC specialist
Trovo Vetted
MA Licensed
Insured
14+
Years experience
600+
HVAC systems installed
5/5
Trovo reference score
About Diane
Diane Walsh is one of the few woman-owned HVAC companies in Greater Boston, and she has built her reputation on straightforward pricing and excellent follow-through. She holds EPA 608 certification and specializes in heat pump systems, mini-splits, and older homes that need thoughtful duct design.
Diane works on both residential and small commercial projects and is particularly experienced with Boston's older housing stock — triple-deckers, Victorian homes, and 1960s ranch houses.
Specialties
Central AC installationHeat pump systemsMini-split installationFurnace replacementDuct design & installationAir quality & filtration
Trovo vetting
In-person interview with Trovo team
MA HIC License #198234 · EPA 608 Certified verified active
Liability and workers' comp insurance confirmed
5 past customer references called — all positive
Ongoing Trovo performance monitoring
Service area
Boston, Somerville, Cambridge, Medford, Malden, Quincy
Typical project range
$3,000 – $18,000
depending on scope and materials
depending on scope and materials
In their words
"An electrical panel upgrade isn't a place to save money. We do it once, properly."
— Diane Walsh, Master Electrician (MA #15832)
How they work
1
Free site visit, written estimate
Detailed scope, line-item pricing, materials list. No verbal "ballparks."
2
Transparent payment schedule
1/3 upfront, 1/3 at rough completion, 1/3 on final walkthrough. No surprises.
3
Daily updates while on site
Photo updates and a same-day response policy on questions.
4
Workmanship warranty
Two-year written warranty on labor. Manufacturer warranty on materials.
From past customers (verified by Trovo)
"Diane upgraded our 100-amp service to 200-amp ahead of an EV charger install. Found two safety issues the previous electrician missed and fixed them as part of the work."
— Roberto V. · Cambridge condo · 2024
"Detailed pricing upfront, on-site exactly when she said she'd be. Inspector said it was the cleanest panel work he'd seen all year."
— Hyun J. · Newton single-family · 2024
"Whole-house generator install + transfer switch — 3 days, on budget, perfectly tidy."
— Rachel P. · Brookline · 2023
Trovo personally calls 5+ past customers before any contractor joins our roster. These are excerpts from those calls, used with permission.
Recent work
Sample work in their specialty area. Once you're matched, you'll see project-specific photos in your portal.