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

Commercial & Industrial

Planned maintenance programs, Sheet metal (CAD design), Duct Leak Test and Sealing Service, Repair and Maintenance


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

Tips to Handle Extreme Cold Weather

J&J Heating and Air Conditioning is prepared with additional staff over the weekend to assist with any problems that may arise due to the extreme weather. Please be prepared that there may be extended wait times due to high demand. We appreciate your patience and will work diligently to be sure everyone is safe and warm this winter season.Stay Safe & Stay Warm! We can be reached at      978-454-8197.

We are there when you need us the most. With Fully Trained Service Technician and Knowledgeable Customer Service .

J&J Heating and Air Conditioning can Design,Fabricate and Install all your HVAC needs.

Install a High Efficiency Daikin Heat Pump Get Up To $10,000 in Rebates.

Call one of our highly trained staff to learn more….

J&J Heating And Air Conditioning makes designing your comfort easy by providing answers to your big questions.

Need to heat or cool just that one room addition? No problem.  Want a different temperature in every room from a single outdoor unit?  Easy.  Want to save on your energy bill with a high efficiency system? Done

Daikin Inverter HVAC Facts

The Daikin DX20VC

The Daikin DX20VC is a high-efficiency air conditioner is powered by a Daikin brand variable-speed compressor, ensuring that the unit can reach up to 24.5 SEER cooling performance, which can result in significantly lower energy bills and better indoor comfort compared to central air conditioners with a single stage compressor.

Daikin Comfort

An Inverter is an intelligent compressor drive module that provides variable speed operation.

So what does that mean? Well, because the Daikin Inverter has variable speeds—as opposed to the basic on/off functionality of single-stage and two-stage units—this unit allows you to cool or heat your home based on the specific requirements of your space.

While single-stage and two-stage systems stop and start repeatedly throughout the day, making the temperature dip below and spike above your indoor setpoint, the Daikin Inverter can keep your home closer to your desired temperature all day, consistently and quietly. Akin to cruise control on a car, an inverter will continuously and automatically adjust to match the cooling or heating load in your home.

Dust, smoke, odors and certain viruses and bacteria all can be suspended in the air you breathe, even when you don’t see them. iWave Air Ionization System installs in your air conditioning system to help clean the air in your living space.

Freon R-22
No Longer imported to United States

BOSTON – The last thing on your mind may be your home’s air conditioning unit, but, a new law goes into effect at the end of the year that could leave you sweltering next summer if you don’t pay attention. Freon, also known as R-22, will no longer be made or imported to the United States, starting January 1st, 2020. The Environmental Protection Agency said the odorless gas, which is one of the key refrigerants in air conditioners, is bad for the environment because it depletes the ozone layer. It will be replaced by more environmentally-friendly refrigerants