A modulating central heating boiler makes the water very hot once, after which the central heating boiler only has to keep the water at the required temperature. When a modulating thermostat makes a heat request at the central heating boiler, the central heating boiler draws from the already heated water. With this construction you save a lot more energy than with an on / off central heating boiler. Please note that a modulating thermostat is only suitable for a modulating central heating boiler.
Undamaged|Starter pack|1|All boilers
340,-
221,-
Delivered tomorrow
Undamaged|Expansion|1|All boilers
131,-
83,-
Delivered tomorrow
Lightly damaged|Starter pack|1|All boilers
156,-
99,-
Delivered tomorrow
More Second Chance varieties available
Undamaged|Expansion|0|All boilers, Modulating boilers
311,-
284,-
Delivered tomorrow
Undamaged|Starter pack|1|All boilers
194,-
123,-
Delivered tomorrow
Undamaged|Starter pack|1|All boilers
194,-
173,-
Temporarily sold out
Undamaged|Expansion|1|All boilers
100,-
75,-
Temporarily sold out