Strom SBSP11C 11kW Single-Phase Electric Combi Boiler, 503HR

The Strom SBSP11C is an 11kW single-phase electric combi boiler for wet central heating and instantaneous domestic hot water. Screwfix lists a serpentine heating element and an indicative hot water flow rate of 6L/min. The compact, flueless format can suit properties without gas where a correctly rated electrical supply is available. This is the standard SBSP11C model with a listed five-year manufacturer guarantee subject to registration terms. It is marked unsuitable for filling a bath; check hot water demand and installation requirements. The 11kW rating is the maximum listed output for both the heating circuit and hot water production; actual hot water delivery varies with incoming temperature. This listing uses the SBSP11C model designation and Screwfix code 503HR, distinguishing it from the 11kW Elite version with a different guarantee. The unit should be selected after checking the building’s heat loss, supply cable and expected outlet use.