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Air Source heat Pump
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<blockquote data-quote="Peterweb" data-source="post: 6644176" data-attributes="member: 144531"><p>Re thé ashp and insulation. I have heard this before but I don’t understand why this is any more relevant to ashp versus oil boiler etc. The problem of heat loss due to lack of insulation impacts both systems equally surely?. My current oil boiler will need to work harder in a poorly insulated house just like the ashp. </p><p>We have a large chateau in rural northern France, and in winter we do not attempt to heat the whole chateau. Only bedrooms and living areas that are occupied are heated unless there is a risk of pipes freezing but that is rare in Normandy. So whilst we have a large potential area to heat, we do not plan to size up any new heating system for the whole area. Instead we will be keeping the oil boiler as a backup to boost the system during colder periods.</p><p></p><p>But back to my original point. Any heating system will be more expensive to run in poorly insulated spaces no matter how big they are. An ashp’s running costs will go up during colder months as will my oil boiler. At the end of the day, it is surely about heating energy in versus that energy being lost, no matter the source of that energy. </p><p></p><p>The ashp’ s seem to like to run at a lower temp , according to those that have them. This I don’t understand. If ashp can run in Sweden down to -20c then surely that same boiler in Normandy where it’s rare to go much below -3 c would be able to heat water to a much higher temp. After all it will be extracting heat from much warmer air . That energy will be used to heat the water to a higher temp surely ? Or is there some inbuilt temperature limiter?</p><p></p><p>If I understand it correctly, the energy extracted from the air , is directly proportional to,the volume of air that the ashp sucks into its exchangers. More air in, more heat generated at any given air temp. If a ashp can heat water to say 35 c in Sweden then surely its capable of heating water to 50 c in Normandy where there is much more energy in the air comparatively. Our boiler operates at around 50 c in Normandy currently. So if the ashp can get the water to 50c most of the time, then my current systems pumps will still be able to use that water generated from the ashp in the same way it does from my oil fired boiler. </p><p>We are not particularly well insulated I would say, but our current heating is effective . It is simply not feasible to insulate a large chateau effectively. All I am trying to achieve is to lower the running costs by replacing the oil as much as possible.</p></blockquote><p></p>
[QUOTE="Peterweb, post: 6644176, member: 144531"] Re thé ashp and insulation. I have heard this before but I don’t understand why this is any more relevant to ashp versus oil boiler etc. The problem of heat loss due to lack of insulation impacts both systems equally surely?. My current oil boiler will need to work harder in a poorly insulated house just like the ashp. We have a large chateau in rural northern France, and in winter we do not attempt to heat the whole chateau. Only bedrooms and living areas that are occupied are heated unless there is a risk of pipes freezing but that is rare in Normandy. So whilst we have a large potential area to heat, we do not plan to size up any new heating system for the whole area. Instead we will be keeping the oil boiler as a backup to boost the system during colder periods. But back to my original point. Any heating system will be more expensive to run in poorly insulated spaces no matter how big they are. An ashp’s running costs will go up during colder months as will my oil boiler. At the end of the day, it is surely about heating energy in versus that energy being lost, no matter the source of that energy. The ashp’ s seem to like to run at a lower temp , according to those that have them. This I don’t understand. If ashp can run in Sweden down to -20c then surely that same boiler in Normandy where it’s rare to go much below -3 c would be able to heat water to a much higher temp. After all it will be extracting heat from much warmer air . That energy will be used to heat the water to a higher temp surely ? Or is there some inbuilt temperature limiter? If I understand it correctly, the energy extracted from the air , is directly proportional to,the volume of air that the ashp sucks into its exchangers. More air in, more heat generated at any given air temp. If a ashp can heat water to say 35 c in Sweden then surely its capable of heating water to 50 c in Normandy where there is much more energy in the air comparatively. Our boiler operates at around 50 c in Normandy currently. So if the ashp can get the water to 50c most of the time, then my current systems pumps will still be able to use that water generated from the ashp in the same way it does from my oil fired boiler. We are not particularly well insulated I would say, but our current heating is effective . It is simply not feasible to insulate a large chateau effectively. All I am trying to achieve is to lower the running costs by replacing the oil as much as possible. [/QUOTE]
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