Separating two boilers to provide weather compensation on two separate curves with no mixing
continuing on from a previous video. a couple of weeks ago I installed a pair of domestic boilers to replace two commercial boilers. originally these were to be installed on the Old existing controls. once the customer had been introduced to the concept of weather compensation and the simplicity of its use and control the decision was made to change the installation to include weather compensation. the building was half underfloor heating and half radiators and so the boilers were separated to run each circuit on a separate Curve. the underfloor heating was left attached to the low loss header to allow for the different delta T's between underfloor heating circuit and the boiler. the boiler to run the radiators was just directly connected and now operates on the internal pump within the boiler. the number of pumps we have removed is truly shocking.