Activity
 
Notifications
Clear all
bontwoody
bontwoody
@bontwoody
Contributor
Noble Member
Joined: Mar 5, 2022
Last seen: Jun 20, 2025
Topics: 28 / Replies: 804
Reply
RE: Samsung heat pump sizing

@jamespa That was my feeling, but I have seen it argued that oversizing does not cause significant inefficiency, so I erred on the diplomatic side 🙂

4 weeks ago
Reply
RE: Samsung heat pump sizing

@johnnyb I believe the jury is hung as to whether an oversized heat pump is actually less efficient. I think most people though agree excessive cyclin...

4 weeks ago
Reply
RE: Samsung heat pump sizing

@johnnyb Using the immersion wont improve the efficiency but if you can get cheap rate electricity it should be no more expensive and may even be chea...

4 weeks ago
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 ...

4 weeks ago
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...

1 month ago
Reply
RE: Samsung heat pump sizing

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

1 month ago
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.

1 month ago
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...

1 month ago
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...

1 month ago
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...

1 month ago
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 ...

1 month ago
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...

1 month ago
Page 2 / 70
Share:

Join Us!

Trusted Installers

Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.

✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available

👉 Find your installer now!

Latest Posts