Commercial Heating This is an installation which we did in July 2007. We were called in to replace an existing cast iron heating boiler which was very inefficient and resulting in large gas bills.
We installed 2 Viessmann Vitodens 300 system boilers cascaded together, Seperate pump divicon's for each zone and controlled with weather compensation to give optimum efficiency.
The weather compensation measures the outside air temperature and recognises what temperature you require internally(which you set) and sets the boilers to give you the correct required temperature to the heating system. This way it only needs to heat the water enough to give you the required room temperature instead of heating the water to 80 deg C every time, regardless of weather conditions and can save you on your fuel bill.