When was the last time you thought about the size of the boiler in your house? If you want to enjoy low heating bills then boiler size matters. In most cases a boiler will be oversized because the installer does not want homeowners requesting a new system if the house cannot stay warm. While no one wants to have a cold house all winter, in many cases installers overcompensate and install a boiler 20 to 50% larger than required.
While this prevents a cold house on the coldest days of the year, it also reduces potential efficiency gains. In most of the year, the full capacity of the boiler is not required, and with low heating loads a boiler will need to cycle on and off to meet the needs. Modulating boilers reduce this cycling as they can run at a low firing rate. Traditional boilers operate simply on or off at the highest firing rate.
Houses with multiple zones compound the boiler sizing issues. In a home with multiple zones, a single zone may require heat, which is a fraction of the full heating load. A condensing boiler works better than conventional boilers due to its ability to modulate, or adjust its firing rate from full fire to a rate that is only 1/3rd of its full firing rate. Therefore, when a single zone in a home requires heat, the boiler is able to handle that requirement at firing rate that is better suited for the job.
Triangle Tube's Prestige and Challenger Condensing boilers are designed to meet the needs of homes with single or multiple zones. When combined with a Smart Indirect Water Heater they make an energy efficient solution to most hydronic heating needs.