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Expert HVAC Services

Jeff Mackay Mechanical works across New Hampshire providing prompt, efficient service.
Heating and cooling system inspection, repair, and replacement.
We bring over three decades of expertise to our customers, for HVAC services they can trust.

Get the peace of mind that comes from knowing your heating and cooling systems function optimally, no matter the weather.

We're here for our customers; from annual inspection to 24/7 emergency service, we'll make sure your heating and cooling are in top condition.

Get a free quote for HVAC service!
Prompt, efficient HVAC repair and installation in Littleton, Lincoln, Plymouth, and Hanover.