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bontwoody
bontwoody
@bontwoody
Contributor
Noble Member
Joined: Mar 5, 2022
Last seen: Apr 4, 2026
Profile Activity
Topics: 37 / Replies: 971
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Reply
RE: Samsung heat pump sizing

@jamespa That's interesting James. Two other things occurred to me after my last post.The first is that all DHW cylinders include an immersion heater ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

The point about needing a legionella cycle at all and how hot the water needs to be if you use one. Its an interesting point that if people cannot a...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

@johnmo absolutely agree. However I've had conversations with heating engineers who categorically take a different opinion 🙃

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

@johnmo That's fair enough. Although I'm not sure how that rule squares with having to use an immersion for legionella in addition to the heat pump.

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

Im not sure I follow why you are opposed to using an immersion heater for the very cold days? If the price using off peak energy works out to the same...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

@johnnyb Hi. Yes I just use the immersion overnight. Although the heat pump could probably get a DHW COP of 3.5 as the price per unit is 3.5 x less ov...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung heat pump sizing

@johnnyb I think potentially you may be right that 8kW will be too large for your heating although the 5kw may struggle with DHW. Can I ask if you...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How accurate was your heat loss survey?

@scalextrix When do you intend taking the plunge? Do you have next winter to work with to get some good data? If you have the house area and a feel ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How accurate was your heat loss survey?

@scalextrix I think what you are describing is exactly why I am so sceptical of room by room assessments and more supportive of previous use estimates...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: UFH and ASHPs

@guydeb I'm just in the middle of constructing a 40m2 extention myself and looking at the amount of insulation required now I expect the heat loss to ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: UFH and ASHPs

@guydeb Yes. No problem running just UFH from an ashp. The issue I think would be the very low heat loss in a 40m2 new extension. How sure are you tha...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

@matwin I believe the degree days calculation is an accurate method of assessing heat pump size. Im not sure how much detail the YouTube video goes i...

11 months ago
Forum
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