413-271-7611 (tap to call)

COVID-19 Update

We are open, fully staffed, and ready to help!

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Call Us 24/7!

New Arrivals

Window Air Conditioners

Starting from



Emergency Services


ANY Repair Service!

$50 off

Save $50 on you next heating, plumbing, or cooling repair. We service all makes and models 24/7!

Home of the...

$69 Tuneup!

Pay only $75 per unit* (Regularly $165.00+) for Heating Maintenance when you purchase a one year membership in the AirPro Experts.

Home of the...

$69 Tuneup!

Pay only $75 per unit* (Regularly $165.00+) for Heating Maintenance when you purchase a one year membership in the AirPro Experts.

Our Family Serving Yours, For Over 75 Years!

Climate Design Systems

Experienced and polite repair technicians, up-front pricing, and a commitment to total customer satisfaction are just a few of the reasons that residents in the Merrimack Valley and surrounding areas trust their home comfort to Climate Design Systems. We are a full service HVAC contractor specializing in the repair, maintenance, and installation of residential heating and air conditioning systems.

Nobody plans on having a heating or cooling emergency, and we realize this can be a very stressful situation. Our staff of 150+ employees and over 75 service vehicles are ready to provide immediate service 24/7 and will work with you every step of the way to ensure total customer satisfaction.

We look forward to working with you!

Berkshire Heating & Air Conditioning technician
COVID-19 Response

Climate Design Systems, LLC has committed itself not only to staying open through this crisis, but doing so in the most responsible way possible.

Our focus has been on educating and stream lining our process to meet the needs of our customers. All of our field employees are being provided with Face Mask, Gloves, Booties, and Sanitizer, and when possible are being directed not to enter the home at all.

We offer completely contact-less service, with billing taking place electronically.

Please call 978-689-8312 with any questions or to find out more about how we are working to keep our community safe.

Home Comfort Services


We provide 24/7 heating repair, maintenance, and installation to keep you warm and comfortable during the harsh New England Winter.


Whether you need a quick A/C repair, maintenance, or the installation of a new system, our trained technicians have you covered!

Air Quality

Improve the indoor air quality of your home! Choose from humidification control, UV germicidal lights, air purification, filtration, and more.


Whether it’s a new hot water tank, or a clogged drain, our team of licensed plumber is ready to help with all of your plumbing issues!


Get peace of mind knowing your protected against power outages and keep your home up and running with a back-up generator.

Commercial HVAC

Commercial HVAC design and build services including fabrication, design, service, and maintenance of industrial HVAC systems and equipment.

Amanda Seyfried

Manhattan, New York.

I have never had such a pleasurable experience with heating and air conditioning company in New York City. The technicians were courteous, professional, and a pleasure to work with.

Thomas Michael

Bronx, New York.

We have used AirPro for many years for heating and now plumbing. They set up appointments promptly, show up when they are supposed to, and do excellent work. I would highly recommend AirPro!