For all those posting here I think I should add a further pointer to another limitation on combi boilers which affects their operation with showers.
Almost all thermostatic showers mix 10-15% cold water ALL the time. This is meant to be a safety feature, the effect is that the hot water then has to be above normal combi output temperature as its going to be cooled in the shower by the 10% cold water.
Modern Combi boilers are designed to give a controled output temperature within 1*C and in addition have a maximum output temperature of say 55-65*C again to prevent scalding.
The situation can arise that the maximum temperature output of the combi is insufficient to give the required shower outlet temperature after its is mixed with the 10% cold water.
Now to the poster, any electrical appliance in a bathroom should for electrical safety reasons be contained with a fully enclosed box to ensure no part of the appliance or any electrical switch etc. can be touched by anyone using the bathroom.
The very latest regulations also imply that any electrical appliance in a bathroom MUST be fed via an RCCD which is situated outside the bathroom.
Tony Glazier
Almost all thermostatic showers mix 10-15% cold water ALL the time. This is meant to be a safety feature, the effect is that the hot water then has to be above normal combi output temperature as its going to be cooled in the shower by the 10% cold water.
Modern Combi boilers are designed to give a controled output temperature within 1*C and in addition have a maximum output temperature of say 55-65*C again to prevent scalding.
The situation can arise that the maximum temperature output of the combi is insufficient to give the required shower outlet temperature after its is mixed with the 10% cold water.
Now to the poster, any electrical appliance in a bathroom should for electrical safety reasons be contained with a fully enclosed box to ensure no part of the appliance or any electrical switch etc. can be touched by anyone using the bathroom.
The very latest regulations also imply that any electrical appliance in a bathroom MUST be fed via an RCCD which is situated outside the bathroom.
Tony Glazier
