Self Build in the UK!

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jaseypk
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My Pool: Self Building!

Self Build in the UK!

Postby jaseypk » Mon 22 Apr, 2024 03:34

Morning Everyone!

I've been silently reading your forum in the background, and absorbing almost all of Youtube's self build content for about. year now, and now the time has come. The council have granted us permission to start, so here I am!

I'd like to say thank you to all those who post helpful content on here - it really is appreciated even by the secret readers like me (richie967 and Teapot1)

So I've just started to mark out and clear the area for a pool in my garden in the heart of Yorkshire, England:
- a 4m x 2.5m pool, approx 1.4m deep, constructed from blocks on a concrete base, insulated, with the surfaces rendered and tiled. I don't fancy a liner, and I prefer the look of tiles all over to painted.
- Pool will be sunk into the ground 1m, then raised above ground by the remaining 40cm. The reason for this is we have a young child, and a hyperactive dog, and I don't want either of them falling in accidentally! It'll also help keep all the leaves and blossom from a nearby tree out (I hope).
- I think I'm 'opting out' of a ground drain and just using a single skimmer as the pool isn't very big and the online consensus seems to be that ground drains are just a source of problems
- I wanted it heated to be usable all year round (ideally 30'c + all year... 35'c if possible!). The dream is to float in the pool with a beer when there is snow on the ground :D
- Target completion date is August the year - hopefully gives me plenty of time. Obviously if it's ready sooner, even better!

I think I've got plenty absorbed knowledge for construction for the moment while I dig a hole, but I want to build a pit at the same time to house as much equipment as I can. So that said, I need to work out how I'm going to heat this pool to 30'c in all weathers from 0'c - 30'c. I'd like to use the most efficient method of course, which I understand is a heat pump. But - I can't seem to find any resource on how to calculate the size heat pump I need to cater for these needs. I'm also presuming the heat pump will need to be above ground, surrounded by fresh air and not in a sealed pit underground.

So, first questions to get me started:

1) Is a heat pump the best course of action for an all year round 30'c pool, with ambient temps of 0-30'c? If not, what is?

2) How do I calculate what size heat pump I need? kWh to 'units' means nothing to me right now, so I may need someone to explain the maths to me.

3) Any preliminary advice while I start digging is greatly appreciated. I've never built a pool before, but I'm fairly handy with construction and plumbing so I'm hoping it won't be too much of a headache!

Thanks all!
Jase


Teapot1
Pool Industry Leader
Pool Industry Leader
Posts: 1248
Joined: Thu 29 Apr, 2021 00:43
My Pool: 12000 gallons vinyl liner,

Re: Self Build in the UK!

Postby Teapot1 » Mon 22 Apr, 2024 17:29

Answer in the morning, too late tonight.
I may not give you the answer you want to hear, but I will give an honest opinion of your situation as you decribe it.
jaseypk
I'm new here
I'm new here
Posts: 3
Joined: Mon 22 Apr, 2024 03:05
My Pool: Self Building!

Re: Self Build in the UK!

Postby jaseypk » Tue 30 Apr, 2024 01:08

Teapot1 wrote:Answer in the morning, too late tonight.


Morning, apologies but I’m presuming you’ve forgotten to reply.

Digging progress is going slower than I’d have liked but we’re getting there. Somehow I’ve incentivised a ‘digging party’ for a few friends over the next few weeks so that should finish it off!
Teapot1
Pool Industry Leader
Pool Industry Leader
Posts: 1248
Joined: Thu 29 Apr, 2021 00:43
My Pool: 12000 gallons vinyl liner,

Re: Self Build in the UK!

Postby Teapot1 » Wed 01 May, 2024 02:33

Hi Jase, I did indeed forget to post.
1. Heat pump is the most economic way of heating but as temperatures drop so does the efficiency so could get expensive compared to gas. That also said being in a warm pool at say 27c in cold weather is when you get out its bloody cold especially if there is a breeze!
2. Wouldn't go less than 12kw, might be a bit of overkill but better to have some in reserve. Gas heats the pool quickly, heat pumps long and slow. A good thermal cover is an idea. A lot of the heat loss depends on drafts over the surface of the water.
3. The foundation slab should be wider than the pool by a min of 300mm all round and deeper at the edges to make a stronger slab, I am sure you would have seen examples on the web whilst you have been researching.
Hopefully you have read my many posts on variable speed pumps and Dryden Aqua's AFM ng filter media.
I may not give you the answer you want to hear, but I will give an honest opinion of your situation as you decribe it.
jaseypk
I'm new here
I'm new here
Posts: 3
Joined: Mon 22 Apr, 2024 03:05
My Pool: Self Building!

Re: Self Build in the UK!

Postby jaseypk » Wed 01 May, 2024 05:03

That’s great, thanks. I had seen you’d mentioned before in another post about enlarging the slab, so I’ll make sure my hole is bigger accordingly.

I had thought of the winter running and for this first year it’ll be a bit of an experiment I guess. See how efficient it isn’t and decide if The costs of running through the icy season are worth it or not.

I’ve not read about the variable speed pumps or filters, but I’ll take a look now, thanks!

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