Top 9 Ac Installation in Portland, ME
The best AC installation companies in Portland, ME for 2026 include Dave's World Scarborough (4.9), Pine State Services (4.7), Gammon’s Heating & Cooling (4.8). All offer free estimates, licensed installation, and manufacturer warranties on new units.
AC Installation in Portland, ME: What to Know Before You Buy
A new AC system is a major investment. The right installer in Portland, ME will properly size the unit for your home, handle permits, and back the work with a solid warranty. Undersized or poorly installed systems waste energy and fail early.
- Get a Manual J load calculation — not just a rule-of-thumb sizing
- Ask about SEER2 ratings and expected monthly energy costs
- Confirm the warranty covers both equipment and labor
Heritage Home Service
Pine State Services
Maine Heating And Cooling LLC
Aces Highlands HVAC/Plumbing
LaPlante Electric
Dinosaur Heating and Cooling LLC
Johnstone Supply
Only Heat Pumps Maine
HVAC Services Inc.
How We Ranked These Portland Pros
Our rankings are based on a weighted evaluation of five key factors:
- Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
- Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
- Response Time — Companies offering same-day or 24/7 emergency service score higher.
- Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
- Experience & Longevity — Years serving the Portland market and breadth of services factor into overall reliability.
Rankings are reviewed quarterly. Have a correction? Contact us.
Frequently Asked Questions
How much does AC installation cost in Portland?
AC installation in Portland costs $3,000-$7,000 for a central air system. A full HVAC system (AC + furnace) runs $5,000-$12,000. Mini splits cost $2,000-$5,000. Price depends on home size, SEER rating, and ductwork needs.
How long does AC installation take?
Standard replacement takes 4-8 hours (1 day). New installation with ductwork takes 2-5 days. Mini split installation takes 1-2 days.
What size AC do I need?
General rule: 1 ton per 500-600 sq ft. A 2,000 sq ft home needs a 3-3.5 ton unit. A professional load calculation (Manual J) gives the precise answer — oversized or undersized units waste energy and fail faster.