Fill out the form below and we’ll get back to you within 3 hours with a quick, no-obligation quote.
Domestic Home Water and Smart Home Heating
Outstanding efficiency and clean combustion
At the heart of each Vitodens boiler is a Viessmann-made stainless steel burner with an intelligent combustion management system, which automatically adapts combustion to changing gas qualities and operating conditions. This burner offers extremely clean combustion with low emissions, as well as maximum performance and efficiency with a high turn-down ratio.
The Vitodens family of gas condensing boilers is your efficient and environmentally-friendly choice for all residential heating applications. With Vitodens, you can help protect the environment – and your wallet – without compromising your comfort.
The #1 selling Tankless water heaters.
Navien is now the #1 manufacturer of all gas tankless water heaters (condensing and non-condensing) in North America*
Condensing Tankless Water Heaters
Navien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. The NPE-2 series offers ultra-high efficiency up to 0.96 UEF to keep your utility bills low, endless hot water, and exclusive ComfortFlow® technology with a built-in recirculation pump and buffer tank.
What does high efficiency mean for tankless water heaters?
Tankless water heaters heat water only as it’s needed, which makes them more efficient than even the highest-efficiency tank style gas water heater. According to the U.S. Department of Energy (https://www.energy.gov/energysaver/tankless-or-demand-type-water-heaters), tankless water heaters can be up to 34% more efficient than storge tank water heaters.
High-efficiency tankless water heaters are rated by a UEF: Uniform Energy Factor. This rating is based on how much energy the unit uses, and what percentage of that energy is used to power the unit. Navien’s NPE-2 series condensing tankless water heaters (https://www.navieninc.com/series/npe-s2) have up to .96 UEF, which is at the top of the high-efficiency range.
Get expert assistance when you need it—quick response times and dependable support.
Serving West Michigan since 1971 with expert heating, cooling, and fireplace solutions.
We install top brands with professional craftsmanship and guaranteed service.
Licensed and Insured our HVAC Technicians do their very best to handle your heating and cooling needs in a timely and professional manner. From a new install to routine maintenance Fullmer and Sons is there to keep your family comfortable all year round.
© 2025 Fullmerandsons. Design by Echowingsmedia
Fill out the form below and we’ll get back to you shortly.
