How big a heat pump do you need? A simple Rule of Thumb.

At last: a comprehensible concise explanation !

This is very interesting! My final year dissertation is on heat pump retrofitting for energy efficiency and I definitely need some of these experiences you have 😅👏

Brilliant. The best ideas are often the simplest. Thank you!

Outstanding presentation - thank you very much.

Really interesting, explained really simply as well. I was doing my calcs as you were speaking. Even downloaded the degree days for my location.

This is very interesting and a great rule of thumb but should only be used as a guide. Heat pump installers are required to meet specific temperatures within the house. This rule of thumb is based upon the present occupant consumption, this method will work very well for that occupant. But what happens if they sell their house and it turns out, that they liked their house cool, or were very frugal, as a lot of people are. This would result in a very low consumption and hence a low heat pump calculation. The new occupants however, perhaps elderly or people in need of a warm house will have an undersized heat pump. I’m all up for simplicity so thanks for this guide.

Awesome video, glad to be reassured that the calculations that Octopus quoted me are correct, can't wait to get mine installed

Excellent to-the-point presentation. It should be the bases of any selection and types of dwelling. The calculation is simple but most importantly easy to understand and apply especially to design and build companies. MCS requirement is extremely complicated, especially for installers. The method needs to be adapted for domestic application. Thank you

Thanks Michael, great presentation, sent here from BetaTalk Podcast which was also excellent 👍

Well done Michael

Thank you Michael, that was an excellent presentation and very helpful.

That was simply wonderful. Your presentation was simple and straight to the point. It highlighted all the very important points I needed to make an informed decision about selecting a heat pump. Thank you so very much as this came at a crucial time of making a decision on what size of heat pump I might need.

5:24 - You have obviously put in a great deal of thought an effort into this problem. This looks quite a simple way of determining need; but, I'm curious as to how you arrived at the constant used in the denomenator of your 'formula'. Thanks for sharing your thoughts. 10:43 - Thank you for answering my question later in the video. A little calculus never hurt anybody! I could have just watched until the end and dropped the original post.

Thanks for a great presentation that is clear and logical - I am a subscriber now.

I am so glad that I found your channel - I hope that you’ve got more content. I also read your articles and they answered all my additional questions (how valid is HDD? What is the relationship between the set temp and the overall numbers? Etc)

Thank you for making this video. It kept me from buying an greatly oversized heat pump.

Excellent presentation Michael very useful, thank you 😊

Thanks for this information! I can get a rough guestimate at least to my current heat loss, which is enormous as I have predicted due to it being large and ancient building xD Now I probably can get some estimations on how much I would be able to reduce it with various insulation materials and techniques

Very well put together and presented video.

This is one of the best videos on this topic.