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1

There was an issue with the refurbished replacement motor/parts. I purchased another replacement motor from a different retailer and it has been working without issue for about the past year.


2

Is your question academic or specific to your home? For general & academics, there is a good discussion in a previous question linked in the comments by Isherwood: Why is turning down the heat during day and night considered more efficient? If you are asking specific for your home, the best way is A/B split testing (as also @FreeMan suggests). Over a ...


1

In almost all cases it's more economical to allow your house to be closer to the outdoor temperature for as long as possible. At night or not at night, every degree and every hour of reduced differential reduces your bill. Re-establishing temperature later will not cost more, it will cost less because you lost less energy during the period of reduced ...


3

If heat loss, and the associated amount of fuel required to add heat to the house to compensate for that loss, is the only concern then yes allowing the house temperature to track the outdoor conditions is most economical. Heat loss is proportional to the difference in temperature between indoors and outdoors. If the indoor temperature is held constant even ...


0

What do you mean by "hot water system"? The hot water that comes out of your taps? That will either be mains pressure (combi-boiler or system boiler), gravity fed (your current tank system) or boosted by a pump (in areas where mains pressure is low). I've only heard the central heating system referred to as presurrised. That said, there does need ...


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