DanDee

The ideal building for inertia would be brick and concrete, no wood in between levels but concrete, with external insulation. UFH in concrete all around doesn't need a buffer. In addition to a DHW tank a second tank with a very large coil, splitting the volume in half would be ideal for a big family with the second tank acting half as a buffer and the other half pre warming the DHW.

This mupp done it because the lady of the house wanted the look, people are telling him they are 9 time more expensive per kW output than double panel rads, he is arguing that they are only twice more expensive. To sum up his video, he orders the wrong size, he thinks it has a bigger output that the reality, he is telling people the wrong info, he doesn't even mention the benefit of the extra volume of water.

Tell them you are paying £1K for someone to come and do it.

Plastic Coated Copper Pipe

This is a passive house that as you can see, keeps the shutters down on sunny days.

A refrigeration system power and efficiency is obtain by matching the compressor size, evaporator and condenser size, and the charge. The heat pumps already have a charge storage device/buffer/receiver, but the actual power size is mainly due to the compressor size, the rest it's just to match the output required and the efficiency of the system. The speed of the compressor drives the power output by varying the system pressure, a pressure too low makes the refrigeration cycle inefficient or it even stops, no pressure no flow. In order to have lower output that the minimum of a given compressor, you need a smaller compressor. A vrf has two compressors than run as one or two.

http://www.gorenje.com/heating-systems/en/heat-pumps/heat-pumps-aerogor/bivalent-systems Humm I found some product fiche from Greece and the COP is lower than Keymark(correction it's the 55C only in the fiche) https://www.ambientclima.gr/wp-content/uploads/2022/11/common-energylabel-ae080bxydeg-eu-ecodesign.pdf https://www.ambientclima.gr/wp-content/uploads/2022/11/common-energylabel-ae120bxydeg-eu-ecodesign.pdf https://www.ambientclima.gr/wp-content/uploads/2022/11/common-energylabel-ae140bxydeg-eu-ecodesign.pdf The lowest output at 12C is 4kW for the 8 and 4.7kW for 12/14 due to the bigger evaporator

The Samsung old EHS range does not have any hot gas bypass/EVI injection, it's pure compressor horse power. The new HT quiet borrowed tech from the big old commercial units, but the hot gas bypass on the Samsung we are talking about should not be confused with the original hot gas bypass and their function on the chillers that used them due to non inverter compressors. In Samsung it has a pressure protection role. On keymark site you can see some data with lower capacity temps, but not what you are looking for. https://keymark.eu/en/products/heatpumps/certified-products HT quiet 8kW

I thought you said "I think a bare bones 5kw monoblock could be under 2k eventually." Can you make up your mind? With the extra cost for the controller it's 2k without vat. I know it's a unicorn but there are HP in the close range 2k-2.5k bare bone. https://www.theheatpumpwarehouse.co.uk/shop/heat-pumps/air-source-heat-pumps/lg-therma-v-5kw-r32-monobloc-s-air-source-heat-pump-hm051mr-u44/ All included, I think.

https://www.theheatpumpwarehouse.co.uk/shop/heat-pumps/air-source-heat-pumps/samsung-5kw-r32-monobloc-air-source-heat-pump/

It looks like they use the same controllers with different firmware for AC vs HP. Obviously for AC they are easy to find due to the market size.

might just be this one for A/W HP AKB74855319 https://www.nordicrefrigerationsolutions.com/product/akb74855319-remote-controller-assembly/ https://spares2repair.co.uk/lg-various-article-remote-controller-assembly-a-all-rs3-standard-rmc-white-for-intergrated-water-tank-akb74855319

PREMTB100 https://www.orionairsales.co.uk/lg-air-conditioning-premtb100-standard-iii-hard-wired-remote-controller-in-white-9843-p.asp https://aircon-online.co.uk/product/standard-iii-wired-remote-controller/ https://aircon-online.co.uk/wp-content/uploads/2018/04/Standard-III-wired-remote-controller-PREMTB-1.pdf https://cooleasy.co.uk/lg-hardwired-controller-standard-3.html Replacement hard wired remote controller for all compatible LG air conditioning and heat pump units. *Please call for further information regarding compatibility

maybe the metering setting are not right https://midsummerwholesale.co.uk/pdfs/ehs-install-guide-samsung.pdf

Take a meter reading and compare with what the HP displays.

Are you referring to this?

A multi split not run with all the units on does have a lower COP, but for those that find it ideal solution, then it's the best for their situation. ras3.pdf

Try the "water heating" button and see what icon lights up, then try to change temp.

From what I can see, you are shuffling through the view temp menu, you pressed set temp only once, and it didn't change the menu to "set temp", according to this youtube video, I see no point in pressing view temp, you need to play/understand how/why the set temp button doesn't take you where you need.

The user was not asking for details of the heat pump system from which this cylinder comes from. The question is about the small size of the coil inside the cylinder, in terms of efficiency it is not the best choice, the product is old, without any thought put into manufacturing it, for today's requirements. Even as cheap as it comes, the efficiency will suffer long term and is not worth it.

Can you post a video of the display/controls as you are trying to do it?

for all intents and purposes did you understood the question asked by the topic starter?

If it restricts the flow don't use it. Look at the specs of the valve vs the flow/pressure and take a decision. There is more to this job than just connecting pipes/valves without leaks.