Verified record
License not state-verified. We could not confirm a current registration in the state registry. Insurance is self-reported. Look up in the official New Hampshire registry ↗
Highlights
- A no-heat Saturday call — a 2024 customer said John and Keith came Saturday
- Second-opinion diagnosis — a 2023 customer said they found the real problem
- On-time arrival — a 2025 Angi customer said the workers came on time
No heat on a Saturday is the kind of call 603 Mechanical has taken. A 2024 Google customer said John and Keith came out to the house on a Saturday when there was no heat, diagnosed the issue and ordered the parts needed. The Hampton company's website describes refrigeration, heating and air conditioning work for southeastern New Hampshire and the North Shore of Massachusetts, and it states 24/7 emergency service. Its BBB page lists the business as 603 Refrigeration LLC, serving residential and commercial properties, with an A+ grade. A 2023 Google customer said the company pinpointed the real problem after another vendor came out to diagnose it and was far off. A 2024 Google customer said Jonathan took the time to answer all their questions. A 2025 Angi customer said the workers came on time, found a problem and replaced it. A 2023 Google customer said the company went out the next day to help that customer's friends with their HVAC.
What does heating and cooling work cost in Greater Nashua?
Typical your area range for this kind of work, from regional averages — not a quote from 603 Mechanical. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
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