24 Hour Emergancy Service

Serving the HVAC needs of Massachusetts and New Hampshire for over 50 years

We are a full service, family-owned dealer/installer who takes pride in solving the heating and air conditioning needs of our neighbors and business partners in Massachusetts and New Hampshire.


Air Conditioning Units Heating Systems Indoor Air Quality Diagnostics Duct Leak Test and Sealing Service, Repair and Maintenance

Commercial and Industrial

Planned maintenance programs, Sheet metal (CAD Design), Duct leak testing and Sealing service, Repair and Maintenance

New Construction

We understand that building or renovating is a huge investment and our goal to help you with that, is to simply make sure your HVAC system works

Daikin Inverter HVAC

What’s an Inverter?

An inverter is energy-saving technology that eliminates wasted operation in air conditioners by efficiently controlling motor speed. Typically, air conditioners maintain a set temperature by cooling and heating when a room falls above or below it. In inverter type air conditioners, the temperature is adjusted by simply changing the motor speed without needing to turn the motor on and off. The result is less power usage and better energy savings.

J & J Heating and Air Conditioning | 978-454-8197