Welcome to Mainely Plumbing & Heating, Inc.!

We can help you with all of your plumbing, heating and cooling needs!


duo-tec mainely plumbing

The benefits at a glance

  • Efficiency up to 98% at full modulation and 95% AFUE. Exceeds Energy StarĀ® efficiency requirements.
  • Low emission combustion and continuous efficiency from Viessmann stainless steel MatriX cylinder burner with Lambda Pro combustion management system.
  • Wide modulation range up to 6.5:1 to precisely match load conditions.
  • Fast heat-up with innovative DHW Storage Tank Loading System comprised of plate heat exchanger, DHW loading pump and storage tank.
  • Compact and hygienic DHW storage with Viessmann-made titanium infused stainless steel tank (26 USG).
  • Ten-minute peak flow of 60 gallons (model B2TB-35 only) and continuous DHW draw of 3.3 GPM. Based on a temperature rise of 70 °F (50 °F to 120 °F).
  • Space-saving design with small footprint and zero side clearance to combustibles.
  • Simplified installation with pre-installed pressure / temperature relief valves, fully enclosed heating expansion tank and circulation pump, and built-in 3-speed DHW / space heating pump with diverter valve.
  • Multiple venting options with vent length up to 180 ft.

Download Specification Sheet

duo-tec mainely plumbing

Natural gas comes
to Gorham

The PineCrest Inn converts from oil heat to a high-efficiency gas-fired system and reaps huge savings.

mainely plumbing monthly specials

We are a Mitsubishi Diamond Dealer and have helped our customers save as much as 56% on their heating bills by installing the Mitsubishi heat pump mini splits. We are an Efficiency Maine contractor can qualify you for a $750 rebate.

mainely plumbing monthly specials

Also get rid of your tankless coil on your oil boiler and save hundreds of dollars every year by installing a new AO Smith 50 gallon heat pump warranty. At this time 4/20/2015 there is a $200 rebate to the supplier

$750 Rebate

This can lower your payback
to less than 2.5years

Mainely Plumbing & Heating, a proud member of these fine establishments

phcc logo phcc logo pgam logo Gorham Business and Civic Exchange nfib logo nesea logo better business bureau effeciency maine