With over 30 years of experience and hundreds of installations throughout Massachusetts, North River Plumbing & Heating is your trusted choice for your next high-efficient boiler installation. We are factory authorized installers for Lochinvar® Knight Wall Hung Condensing Boiler Systems™ and Viessman® High Efficient Boilers™. North River Plumbing & Heating was one of the first companies in the country to install Viessmann products.