❄️ Official Rankings
10 Best HVAC in Portsmouth, NH (August 2026)
We compared 10 hvac serving Portsmouth and Rockingham County, New Hampshire, and ranked the top providers by verified reviews, ratings, and local reputation — 1,326 customer reviews in all.
The 10 listed below hold an average rating of 4.8 out of 5, led by MCP HVAC. Updated for August 2026.
- HVAC ranked
- 10
- Average rating
- 4.8★
- Reviews analyzed
- 1,326
- Area codes
- 603, 207
Pettigrew Plumbing & HVAC
⭐ 4.9 · 914 reviews
7 Mirona Rd, Portsmouth, NH 03801
Heritage Home Service
⭐ 4.8 · 75 reviews
28 Deer St Ste 201, Portsmouth, NH 03801
Linscott Electric, LLC
⭐ 5.0 · 22 reviews
56 Pine St, Portsmouth, NH 03801
F.W. Webb Company - Portsmouth, NH
⭐ 4.6 · 10 reviews
112 Heritage Ave, Portsmouth, NH 03801
Murray's Plumbing & Heating Supply
⭐ 4.6 · 9 reviews
459 Islington St, Portsmouth, NH 03801
Ferguson HVAC
⭐ 4.6 · 5 reviews
115 Heritage Ave Suite B, Portsmouth, NH 03801
HVAC in Portsmouth — FAQs
How do I choose the best HVAC company in Portsmouth, NH?+
Compare local companies on verified reviews, confirm they service your equipment — furnace, heat pump, or central air — and check they're licensed in New Hampshire. Top-rated options serving Portsmouth include CMC Mechanical Services LLC and MCP HVAC. Ask about emergency availability for a Seacoast winter.
How much does HVAC service or installation cost in Portsmouth?+
Costs depend on whether you need a repair, a tune-up, or a full system replacement, plus your home's size, so Portsmouth contractors quote after an assessment. For installations especially, get two or three quotes from top-rated local companies to compare.
How often should I service my heating system in New Hampshire?+
Most HVAC professionals recommend an annual furnace or heat-pump tune-up before winter and an air-conditioning check before summer. Regular maintenance keeps the system efficient and helps catch small problems before they become cold-weather failures.
Which HVAC companies are top-rated in Portsmouth, NH?+
By verified reviews, highly rated HVAC providers serving Portsmouth include CMC Mechanical Services LLC, MCP HVAC, and Washburn Plumbing & Heating. Portsmouth is on the Seacoast in Rockingham County (area code 603).
HVAC listed here serve Portsmouth, Rockingham County, and nearby ZIP codes including 00210, 00211, 00212, 00213, 00214, 00215, 03801, 03802, 03803, 03804.