10 AC Installation Contractors in Waltham, MA
Top-Rated AC Installation Contractors in Waltham
Genove Oil & Air, Inc.
“Long-term customer loyalty dominates, with three reviewers citing 20+ year relationships and one reaching 40 years. Same-day and emergency service appears…”
KEN's HVAC SERVICE
“All five reviewers award five stars and name either Ken or George by name, with specific praise for diagnostic accuracy and fair pricing. Four reviewers…”
All AC Installation Contractors (10 total)
Kensington Mechanical Inc
“Thirty-eight reviews produce a 4.9-star average with universal five-star ratings represented in the sampled…”
LeBlanc Mechanical
“Two of three detailed reviews describe positive outcomes for complex dual-system repairs, with one customer…”
Johnstone Supply
“All eight sampled reviewers award five-star ratings, with three explicitly naming staff members (Denys Vu,…”
P. R. Douglas Co., Inc
“Eight verified reviews unanimously award five stars, with four specifically mentioning same-day or hour-based…”
HVAC Services: Heating & Air Conditioning
“All five reviewers awarded five-star ratings, indicating unanimous satisfaction with completed work.…”
Burns Mechanical Corp.
“Of 4 written reviews, 2 award 5 stars citing quick response times and accurate diagnoses. One 1-star review…”
AC Installation Costs in Waltham
New central AC installation costs in Waltham, by system type and brand.
| Service | Low | Average | High |
|---|---|---|---|
Window unit | $168 | $392 | $784 |
Ductless mini-split (single zone) | $2,240 | $5,040 | $8,960 |
Central AC replacement (existing ducts) | $3,920 | $7,280 | $13,440 |
Central AC new install (with ductwork) | $7,840 | $13,440 | $22,400 |
Carrier (residential) | $4,256 | $6,944 | $11,760 |
Trane (residential) | $5,600 | $9,856 | $15,232 |
Lennox (residential) | $3,920 | $7,280 | $13,440 |
Rheem (residential) | $3,584 | $6,160 | $10,080 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
AC Installation in Waltham, MA: What to Expect
Summers in Waltham and the Boston metro push past eighty degrees with real humidity, turning indoor spaces uncomfortable fast. This sticky summer heat is what makes a reliable cooling system feel like a necessity rather than a luxury to many homeowners. Ten contractors keep competitive in this market, and the average rating sits at 4.5 stars across nearly five hundred verified reviews. That demand for reliable cooling explains why AC Installation in Waltham matters to so many property owners around here.
Homeowners find clear cost brackets when planning a system upgrade. Window units range from $168 to $784, ductless mini-splits from $2240 to $8960, and full central AC replacement with existing ductwork runs $3920 to $13440. The wide range reflects home size, equipment efficiency ratings, and whether additional modifications are needed. Massachusetts law requires HVAC installers to carry both a Refrigeration Technician License and Sheet Metal or Pipefitter credentials from the state Division of Professional Licensure, which means the professionals handling your install meet formal trade standards.
Customer feedback points to some distinct strengths across local businesses. Genove Oil & Air draws long-term loyalty, reviewers mention thirty years or more with the same company and same-day service during urgent calls. KENs HVAC earns five stars across the board, with customers naming Ken or George specifically and praising how accurately they diagnose problems before quoting fair prices. PerfectTemp HVAC keeps a perfect positive record across one hundred plus reviews, and customers cite technicians like Brandon and William for careful work and protecting homes during installs.