The Weil-McLain name is synonymous with warmth and comfort. Their energy-efficient, high quality gas and oil-fired boilers can be designed to fit the tightest spaces, with boiler controls and zone controllers tailored to any size residential home. And we offer gas-fired, oil-fired and combination oil/gas boilers for commercial use, including in restaurants, hotels, casinos and other commercial and institutional facilities. As home fuel costs skyrocket, home heating efficiency is on the mind of most homeowners. All Ulra boilers feature AFUE efficiencies in the range of 95.2-96.4%, some of the highest in the industry. It is designed to be environmentally friendly too, and exceeds the highest North American environmental air-quality standards. It also offers cleaner combustion for low NOx applications allowing for a reduction in green house gases too.

Every ultra boiler is hydrostatically tested to ASME standards and test fired. Backed by WM quality and a warranty that offers peace of mind. Unrivaled tech and field sales support. They are north America’s leading boiler manufacturer with a 130 year history. The average setting for the aquastat (the temperature control device on a boiler) for a forced hot water system is 18 0°F. It can be raised as high as 210°F if needed in severe weather. For systems that use coils to heat domestic hot water, the high limit setting is 210°F and the low limit setting 140°F. A differential setting of 15°F is recommended for the optimum amount of domestic hot water. Your local heating professional should perform a heat-loss estimate based upon the size and construction of your home before recommending a boiler size and model.