603-883-8383 john@tempbydesign.net



Temperature By Design, LLC  installs, maintains and repairs Residential:hvac icon

  • Heating – Gas, Electric, Boiler
  • Air Conditioning – Electric, Heat Pump, Ductless Split
  • Air Quality Systems – Balancing, Filtration & UV

While we provide services throughout Eastern Massachusetts and Southern New Hampshire, we have the manpower and ability to take on work anywhere in New England.

Think about the number of hours you spend indoors.  There is more to indoor air quality than adjusting the thermostat. Controlling and correcting humidity affects comfort and reduces energy costs. And eliminating airborne pollutants such as mites, dust and bacteria is an important health concern.

Our commitment to you is complete satisfaction through professional and personal services.

  • FREE Estimates
  • 24 x 7 Repair Service (All Major Brands)
  • Preventative Maintenance
  • Installation – New Construction and Remodeling
  • Satisfaction Guarantee


You can count on our technicians to provide accurate information and helpful suggestions so you can make an informed decision.

Let us show you how to monitor, clean, ventilate, dehumidify (or humidify) and improve the efficiency of your HVAC system and protect your health.  To schedule a FREE estimate call 603-883-8383 – there is NO FEE OR OBLIGATION.


We sell, install, repair and provide maintenance on all makes and ages of heating and air conditioning units and air-quality systems.  We employ OSHA Safety certified technicians. We are available when you need us, including nights, weekends and holidays.  We are just a call away: (603) 883-8383.


Regular tune-ups save money by extending your HVAC equipment life and reducing the number of expensive repairs.  Our knowledgeable staff will help you select the Preventative Maintenance program that is best for your home or office.


Our staff can help you make an informed purchase by helping you sort out the maze of HVAC and air quality equipment on the market (furnaces, filters, air conditioners, UV, boilers, heat pumps and air handlers).  We are a volume buyer which means we get the best pricing available.  we also employ one of the top installation teams in the state for new construction and remodeling projects.