Climate Design Systems

Climate Design Systems, originally founded in 1946 under the name of Haverhill Sheet Metal, is a full-service heating, air conditioning and indoor air quality contractor. We are locally owned and managed by some of the most experienced HVAC specialists in the Northeast.


Climate Design Systems is a division of Merrimack Valley Corp., a recognized leader in heating, air conditioning and mechanical contracting in the Northeast. Both companies share a 24,000 square foot facility located in Methuen and serve the Merrimack Valley, Southern New Hampshire and Greater Boston.


We always take the time to educate our clients on guidelines, new and old, that need to be followed. As a green company, we are concerned with preserving our environment and inform our clients of local and federal funding available when they install systems that are energy efficient. Our Design Build Division always takes into consideration rebates from local utilities when designing mechanical systems.

All of our engineers and technicians are fully certified and trained. We have a staff of 150+ employees and maintain a fleet of 75 digitally-dispatched service vehicles equipped with the parts needed for a majority of repairs. Our staff keeps up with the latest in heating and air conditioning technology.


We live in a wonderful place, but New England's weather can be tough. We know how to keep your heating or cooling system operating at peak efficiency in this harsh climate. We offer a range of service plans to meet your needs.


We're the experts for green heating, cooling and air purification technologies. Turn to us for cost-saving and environmentally friendly ways to heat or cool your home and for professional, qualified technicians. We are on-call for emergencies 24-hours-a-day, 7-days-a-week.

We're committed to do the job, every job, the right way.