Certified HVAC Company in Carlisle MA

Serving the greater New England area for almost 30 years Koval Plumbing is a highly respected plumbing, heating and cooling company. You can call (978) 251-7200 and request a free estimate today. We service and install almost all makes and models of gas furnaces. No job is too big or too small. Our certified technicians are able seven days a week to troubleshoot and diagnose the bigger issues related to slow drains, sewer backups, furnace knocks and more. Having a well tuned HVAC is more likely with proper maintenance. Our technicians are highly skilled and have leading industry experience. Count on Koval today for prompt service and flexible appointments.

For the Best Furnace and Boiler Repair Services in Carlisle Call Koval


  • Furnace Tune-ups
  • Gas Fireplace Services
  • Gas Furnace Heating Systems
  • New Oil Heat Systems

  • See What Our Customers Have To Say
    Mr. Koval is a professional. He is prompt and reliable. Twice, Mr Koval responded to emergency situations, and he dealt with the problems effectively. Today the water to my home had to be shut off due to plumbing problems in my laundry. After that was taken care of he took the time to fix my laundry doors! All this was done at a reasonable rate. I would recommend Mr. Koval without hesitation.
    Whether you need emergency service or routine maintenance, we guarantee top quality work at the lowest market price. Our office can coordinate both emergency service calls and installation services to accommodate your schedule. Superior workmanship is one of the main factors as to why you should choose Koval. Our goal is to be your HVAC contractor for generations.

    HVAC Company For Homes and Businesses Throughout New England


    Koval specializes in helping property owners Carlisle with their plumbing and HVAC challenges. With a wide range of products and services, we recognize the importance of planning and education to help our customers make informed decisions. Our project managers and production experience is a key factor to making sure your project is completed on time with the highest quality. Our satisfaction is only achieved through our clients success with each project we finish.
    ...Not only did they meet our schedule and budget, but they exceeded all our expectations... Tyler T., Middlesex MA Leave A Review