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Temperature By Design is an HVAC and commercial refrigeration company based in Hudson, NH, serving residential and commercial customers across Hillsborough County. Across 47 Google reviews dating back to 2022, the recurring praise is speed and honesty: same-day or next-day response to broken air conditioning and failed furnaces, including emergency calls on weekends and holidays, paired with reviewers saying the technician explained the actual problem rather than pushing an upsell. Several commercial customers -- a restaurant operator, a property owner who had two furnaces replaced in an apartment building, a hotel relying on the company for both HVAC and hot water issues -- describe it as their ongoing provider, and one reviewer reports using the company for roughly ten years. The six most recent reviews, covering the last six months, are all positive with no reported problems. One thing worth confirming before booking: the New Hampshire OPLC registry currently lists the company's mechanical/HVAC business license (MBE1000516) as lapsed. It is worth asking directly about current licensing status when scheduling. Temperature By Design looks like a solid call for homeowners with a broken furnace or AC and for commercial accounts needing dependable HVAC and refrigeration service, provided the license question above is confirmed first.
John was amazing my central ac fan broke and capacitor failed. Cam out that same day and ordered parts the next day. Came back a few days later and repaired ac. Great service. Highly recommended!
"I highly recommend Temperature by Design. Extremely responsive. John showed up right on time, quickly diagnosed the issue, and successfully got my cooling running again. He was very personable and took the time to explain exactly what was wrong in a way that was easy to understand. Excellent and professional service!"
As a Restaurant operator, I’ve come to rely on John and his company to provide us with not only quick and efficient service but real world experience offering insight and opinion on most projects. They don’t just send a random tech in to service an issue. They look long-term and provide options and solutions to hopefully eliminate the need for emergency calls- John doesn’t like being upside down in an ice machine at 11 PM on a Friday night!! But he will!
I cannot give you enough stars to Temp by Design. My company uses a national 3rd party provider and we kept getting charges during preventative maintenance visits and messages that didn’t seem right. We contacted John and he arrived on site, gave detail pictures and descriptions to many unacceptable issues. He corrected these all for us in no time and we will only be using Temp By Design in this area from now one.
I would highly recommend Temperature by design. John was very responsive and helped my farm store out in an emergency. He diagnosed the problem immediately and had us back up and running in no time.
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2 changes recorded — last scanned Sep 4, 2026.
Returned repeatedly until the heater was fixed4.5
Sized before sold5.0
A technician at the door within hours5.0
Commercial depth3.9