HughF
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Everything posted by HughF
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Mini Store - Heat Geek / Newark Cylinders for ASHP
HughF replied to Nick Laslett's topic in Air Source Heat Pumps (ASHP)
I’d have gone for one if it was available when I did my conversion…. Be nice to have something in the cylinder cupboard that was the same size as the vented that came out. -
Mini Store - Heat Geek / Newark Cylinders for ASHP
HughF replied to Nick Laslett's topic in Air Source Heat Pumps (ASHP)
Yep, just watched the video. Standard thermal store with a coil for dhw. Could do the same with a small direct cylinder, a phe, flow switch and shunt pump. -
What refrigerant would you opt for if purchasing today?
HughF replied to CalvinHobbes's topic in Air Source Heat Pumps (ASHP)
Yep, manufacturers data sheet… -
What refrigerant would you opt for if purchasing today?
HughF replied to CalvinHobbes's topic in Air Source Heat Pumps (ASHP)
I’d pick the unit with the widest modulation ratio, ignoring the type of refrigerant used. -
Thinbed foam popular for internal walls in NL too
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Split if you’ve got a long (>20m) pipe run externally…. Personally I wouldn’t bother with the f-gas bod and would just get on with it, but then I’ve got the gear from doing r290 mini splits and r134 cars. Monobloc is better in that you don’t need to find room for any internal components (provided you don’t get a Samsung )
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The other thing to be aware, if your heat pump only had a dhw valve live (or a heating valve live) output, instead of a separate switched live for each valve, you’ll need some relay voodoo to control the 2x 2 ports. luckily mine has both, but I ended up using a 3 port anyway because it was already on the cylinder.
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Yep, I figured most people will be running with radiators, hence my statement…
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Best controls (room stat will auto-adapt your weather comp curve for you, yes I know Mitsubishi also has auto adapt). Best backup if you’re an installer (vaillant take care of it all)
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My vaillant pre-plumbed cylinder came with a Honeywell 3 port…. Go figure…
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I’ve got the smallest vaillant cylinder, the 150 slimline (1m2 coil) being driven with a 9kW ashp - works perfectly… Glyn Hudson uses the same on a 5kW Samsung, again no issues. The vaillant cylinder is a decent one, coil is at the bottom for maximum efficiency.
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125mm ish here…. No stat, fixed flow temp of 28… might turn it off next week, it has been on 24/7 since late October. Works perfectly.
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Gas out, ashp in - house is warmer, larger and comfier for a little less per annum… And I don’t need to pay a gas-safe guy to mess with it, and we can get rid of the combustion appliance inside the house . Win-win… 1946 end of Terrace, on a hill, facing SW, 50mm cavity… it could cost Me £500 more per year and I wouldn’t care, it’s a superior way to heat a home. As for which one to install, one where the room controller/thermostat will adjust the weather comp curve for you instead of just turning the unit on/off. So Vaillant or Mitsubishi.
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1st floor extension - SIPs vs builder
HughF replied to Adam_R's topic in House Extensions & Conservatories
Brick/block makes more sense here…. Easily available materials, easily understood, easily tied into existing structure. -
I use mlcp extensively, I’ll measure fittings bore for you this weekend. p.s. Unless you’ve got naff all water pressure, the reduction from the fittings won’t make any noticeable difference. your issue is 100% the incoming supply. Your plumber should have advised a new 25mm mlcp into the house.
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Does ASHP work for older people on blood thinners?
HughF replied to CalvinHobbes's topic in Air Source Heat Pumps (ASHP)
Do that by rad sizing, not by zoning or trvs… heat pumps like direct, open, systems. -
within conservation area, MCS install or not
HughF replied to Post and beam's topic in Air Source Heat Pumps (ASHP)
Same unit here, went in last September driving a mixture of rads, fan coils and a ufh mixer. DIYd the install myself. Works a treat, occupants happy. Might turn it off later this month, although we did have a frost again last night. -
Tempest heat pump water storage tank Aquastat ?
HughF replied to Cyberfruits's topic in Air Source Heat Pumps (ASHP)
Yes, 3 port mid position valves are pure evil. However, Pretty much every single pre-plumbed heat pump cylinder from all the major suppliers use a 3 port diverter. -
Tempest heat pump water storage tank Aquastat ?
HughF replied to Cyberfruits's topic in Air Source Heat Pumps (ASHP)
I’m not arguing you can’t do it, I’m arguing that no-one does (as it’s unnecessary imho). My Vaillant certainly doesn’t have it wired up thus… -
Tempest heat pump water storage tank Aquastat ?
HughF replied to Cyberfruits's topic in Air Source Heat Pumps (ASHP)
Show me a pre-plumbed heat pump cylinder than has a hi-limit stat wired to the 3 port and I’ll show you a unicorn. -
Does ASHP work for older people on blood thinners?
HughF replied to CalvinHobbes's topic in Air Source Heat Pumps (ASHP)
1946 end of terrace on a hill, facing south west…. we had a 10kW gas boiler when we had single glazing. An ashp can easily heat any house. Any heat source will fail when the heat loss is greater than the input, that’s basic physics. -
Does ASHP work for older people on blood thinners?
HughF replied to CalvinHobbes's topic in Air Source Heat Pumps (ASHP)
Our ashp can easily heat the place to 24 degrees…. It’s all about radiator sizing… -
Ufh flow temp is 20.5, you sure about that?
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516eur seems reasonable…. We’re £100/week during the depths of winter. Backstop rate, 28p/kWh and 50p/day standing charge. All electric house, bit of car charging, lots of tumble drier use.