About Denary Plumbing

At Denary Plumbing, Heating & Cooling, we believe comfort starts with reliability. We proudly serve homeowners and businesses with trusted solutions for plumbing, heating, and cooling needs.

We combine hands-on expertise with the latest technology to ensure every job is done right—the first time. From quick plumbing repairs to complete HVAC system installations, we’re committed to delivering quality work, transparent pricing, and exceptional customer care.

At Denary, we don’t just fix problems—we create long-lasting comfort you can count on.

Reliability

Efficiency

Cleanliness

Honesty

Up-Front Pricing

Quality

What You Can Expect

Options

Professionalism

Customer Reviews

See what our satisfied customers are saying!

I did a remodel of my upstairs bathroom and I can't say enough great things about Dennis! He was prompt and always picked up after his work. He was very professional and kept me involved throughout the process. I highly recommend him to family and friends.

Megan M.

Manchester

Dennis was excellent. He was organized, honest & meticulous. He installed a new water heater, checked everything over carefully & left the area spotless. He was trustworthy & I highly recommend him.

Amanda Z.

Derry

★★★★★

Dennis was a lifesaver. We appreciated his down to earth personality combined with his extensive home plumbing knowledge. It was easy to understand exactly what we needed. He helped us through every step of the process. I can't recommend his services enough.

Brian M.

Needham

Dennis did a great job installing our hot water tank. Very professional and honest. He showed up on time. His work was thorough and neat. I would definitely recommend him for any plumbing needs.

Cheryl E.

Nashua

★★★★★

Dennis was friendly and professional. He sold me a new boiler after recognizing my system was grossly oversized for our home. He walked me through my options and did a great job. Will be using him from now on.

Buying a new heating system is never fun, but this process was made simple. I appreciated his attention to detail and quality of work. He was also great with our huskies.

★★★★★

Brenda K.

Chelmsford

David R.

Nashua

Contact Us

Reach out to Denary Plumbing and Heating for all your plumbing, heating, cooling and gas fitting needs.

Support

603.661.2300

Inquiries

dennis@denaryplumbing.com