Verified record
D & D Heating & Air Conditioning is a North Oxford HVAC company whose website describes it as locally and family-owned, says it has kept homes and businesses comfortable throughout Central Massachusetts for more than 25 years, and names Leicester, Auburn, Charlton, Spencer, Sturbridge, Millbury, Sutton, Webster, Dudley and Worcester in its service area. In a recent review, a customer who needed a system replacement says the company came to assess it immediately and had all of their issues fixed within a week. In a recent review, a customer says AJ accomplished in one hour what another company had not managed for 8 years. In a recent review, a customer who called on a Monday says they were scheduled for A/C service on Wednesday of the same week, and Jimmy explained the issues and asked before doing any work. In a recent review, a customer says a new a/c unit was installed within 2 weeks and the techs completed the job in 1 day. In a recent review, a customer who uses the company for both commercial and residential work says a text alert system keeps them updated when the techs leave the shop. In a 2026 review, a customer said D&D performed duct sealing using the AEROSEAL system, which reduced the leaking in their 42 year system by 86%. In a 2025 review, a customer who called over the weekend for an emergency said the company met them at the property, diagnosed a simple fix, fixed it and charged a very reasonable fee. A 2025 review said the team diagnosed and ordered the correct parts after a lightning strike knocked out the air conditioning. In a 2025 review, a customer said D&D installed a quality boiler at a fair price. In a 2024 review, a customer said D&D installed a ducted heat pump system in their new home over 6 days, and AJ fixed a small wiring issue the very next day; the same customer wished they had a detailed plan beforehand of where the vents, compressor and air handler would go. In a 2025 review, a customer said that after an estimate on their heating system they called several times and never heard back. A 2026 one-star review reads "very rude verbally yelled at my grandmother."
Courtesy and professionalism at every stage of the process. Total skill and knowledge of the required service.
The greatest HVAC company in business!!! Timely and efficient, arrives promptly and does the job in the time they told you it would take, No overages , No bullshit ..If more vendors had these qualities the World would be a better place!! Would recommend to ANYONE!!
AJ, was the finest kind!
Best service around.
They came here checked the machine explained very well and complete the job Very detailed and professional I recommend them
Specializes in
Also offers
Service area
1 change recorded — last scanned Sep 27, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from D & D Heating & Air Conditioning Inc. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Languages
Languages
Ownership
Certified attributes are verified against the public registry. Others are the business's own statement.
Ownership
Certified attributes are verified against the public registry. Others are the business's own statement.
Transparent diagnostics5.0
Broad plumbing and HVAC range5.0
Repeat, years-long customers5.0
Water heater and boiler installs5.0
Two AC technicians out within a few hours5.0