Residential Heating Repair and Service


Don’t be left in the cold this winter! When the weather starts getting cooler, call Koval for a seasonal furnace tune-up. We will inspect your system for rust and damage, clean and lubricate the moving parts, and replace any filters necessary.  This simple and inexpensive annual service will prolong the life of your furnace and keep it operationally efficient.  If any minor repairs need to be made, we are prepared to make them on the spot.

If your furnace quits unexpectedly, don’t worry. Koval has emergency service available 24-7. In many cases, repairs can be made immediately following the diagnosis.

You can depend on Koval to keep your home warm and comfortable when you need it. We have day, evening, and weekend appointments available for residential and commercial HVAC services like:  

  • New oil and gas systems
  • Forced hot water
  • Forced hot air
  • Gas and oil heating system replacements
  • Tune-ups
  • System upgrades
  • Baseboard heat installation
  • Emergency service
  • Gas fireplace service and installation
  • Gas fitting
  • Combustion air systems
  • Chimney liners
  • Heat pumps
  • Indoor air quality
  • Filters
  • Humidifiers
  • Air purifiers

Heating Services - Boiler Repairs - Heat Pump Installation - Middlesex MA - heating2Your gas fireplace needs special care before the season’s first fire. While there is no day-to-day maintenance like ash cleaning or regular chimney sweeping, you should call Koval for an annual inspection. We will inspect the controls, like the ignition system, if you do not have a pilot light or the millivolt generator, we will clean the fan and air passages with a commercial cleaner. We will also make sure your carbon monoxide detectors are in place and functioning properly.

Make this winter your warmest yet! Call Koval to inspect your home’s heating and cooling system for cost effective solutions to control your home’s climate. Whether it’s routine maintenance, small repairs or installing energy efficient systems, we will make sure you are ready for whatever old man winter brings.

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...Not only did they meet our schedule and budget, but they exceeded all our expectations... Tyler T., Middlesex MA Leave A Review