Furnaces, one of the most popular options for heating a residential building, are actually the least economical heating solution available. This is because air cannot hold heat whereas circulated water retains heat, heating your home even after the boiler has been turned off. Furnaces are also loud, with forced air creating a constant disturbance in a quiet home. Air quality problems can also arise if maintenance neglects the furnace filters, which can cause asthma and allergy issues. Residents may also find furnaces to dry out the air, causing uncomfortable side effects.
Boilers are known to be one of the most efficient heating systems for heating a home. The water continues to radiate heat, creating a more consistent warmth that lasts longer than forced air. Boilers don’t require air filters and don’t spread dust or allergens through your home.
A heating system’s efficiency is measured by the annual fuel utilization efficiency (AFUE) percentage. AFUE is the ratio of heat output compared to the fossil fuel energy consumed (annually). Flue and chimney loss is deducted from the overall percentage. Older, low-efficiency heating systems may see an AFUE of around 56% to 70%, whereas high-efficiency systems will be closer to 90% – 98.5%.
By retrofitting or replacing your old boiler you can see hundreds of dollars a year in fuel savings, which can help offset the cost of upgrading in the first place. Larger scale residential buildings such as condominiums and apartments can benefit even further from an efficient heating system. Whereas for a smaller residential building an increase of 20% efficiency may not be enough to warrant an upgrade, larger buildings can much more easily recoup costs.
Our stainless steel condensing hot water boilers have been found to run at up to 99.8% efficiency in optimal conditions. The small, compact size of our HC Series makes them the ideal heating solutions for smaller apartment buildings, whereas our larger models such as the GMI 12M are capable of heating up to 240 apartment units at one time. For smaller residential sizes, please contact us for more information.