what temperature should underfloor heating be
With underfloor heating one only needs a flow temperature of 55 C max. The lowest temperature in the system is the underfloor return, at between 30 and 45 C, so ideally we want to only ever heat water from 45 C through to 65 C to maintain underfloor heating (assuming 20 C rise is suitable for boiler).ith underfloor heating one only needs a flow temperature of 55 C max. The lowest temperature in the system is the underfloor return, at between 30 and 45 C, so ideally we want to only ever heat water from 45 C through to 65 C to maintain underfloor heating (assuming 20 C rise is suitable for boiler).