New Viessmann heat pumps for the easy replacement of boilers  

Viessmann has launched two new ‘Super Silent Design’ monobloc air source heat pumps, the Vitocal 150-A and Vitocal 151-A. Ideal for UK boiler replacements, their compact design means they take up 60% less space while installations are reduced by 90 minutes.

Their 70C maximum flow temperature (without an immersion heater) means that in some cases the existing hot water cylinder can be retained, depending on its coil size, desired store temperature, insulation level and mechanical integrity. Subject to the system design requirements and seasonalised efficiency calculations, existing radiators may also be retained, depending on the heat loss from the house.

With a COP (Coefficient of Performance) of 4.9-5.0 (according to EN 14511 for A7/W35 and depending on the model), the new heat pumps generate up to five times the usable heat for heating and hot water from one kilowatt hour of electricity and heat from the outside air.

Pictured are the Viessmann Vitocal 150-A (wall-mounted) and 151-A (floor-standing) domestic air source heat pump indoor and outdoor units.