: On a mildly chilly day, the boiler might only heat the water to . On a freezing day, it will ramp up to Why it's a "must-have" :
: These allow the boiler to adjust its flame size (firing rate) up or down based on demand, rather than just being "on" or "off". Built-in Leak Sensors : Found in premium models like the Rheem Prestige Combi Boiler Go to product viewer dialog for this item. buy gas boiler
: It provides more consistent, steady warmth rather than the "blast of heat" followed by a cooldown typical of older systems. : On a mildly chilly day, the boiler