We used Nashoba Air and Boiler Works to convert from our extremely old oil furnace to a high efficiency Lennox gas furnace. Their rep Bruce Lovett braved the scary, low ceiling basement to evaluate our needs and advise us of the options appropriate for our home. From that first meeting to the final day of work, Bruce and all the people from Nashoba Air and Boiler Works were top notch professionals. Bruce guided us through the Mass Saves program and we received a no interest loan and rebates. We are having them come back and install central a/c. Our several friends who decided to use Nashoba Air and Boiler Works have all been extremely happy with the work and products. Great company!