With a combi we are told that there should be an ideal temperature drop across a radiator of 20C. On my system I can achieve 12C using the lockshields with my boiler set at 50C. This keeps the efficiency of my boiler sitting at around 96%, as the flow from the return is well below the condensing threshold of 55C sitting at around 33C due to the boiler modulating.
As heat pumps seem to require a flow temperature no higher than 50C but the lower the temperature the better, I am in heat pump territory if I ever changed. As heat pumps don’t condense can the lockshields be set to pass more water so producing more heat accross the surface of the radiator with more of the radiator being hot while maintaining balancing? This would result in the return temperature to the heat pump being higher than it would with a condensing boiler. With a higher return temperature would this aid the efficiency of the heat pump as it would have to work less hard, which is the opposite to how a combi works?
As heat pumps seem to require a flow temperature no higher than 50C but the lower the temperature the better, I am in heat pump territory if I ever changed. As heat pumps don’t condense can the lockshields be set to pass more water so producing more heat accross the surface of the radiator with more of the radiator being hot while maintaining balancing? This would result in the return temperature to the heat pump being higher than it would with a condensing boiler. With a higher return temperature would this aid the efficiency of the heat pump as it would have to work less hard, which is the opposite to how a combi works?
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