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My system does not need to run at 70 degrees, but I have tested the unit and does achieve 70

Do you think that these R290 units could be an (almost) straight swap for a house boiler? (I.e. Keep existing rad sizes). For example, I have my gas boiler pushing 65 deg C water out to them... And wondering if there may be a straight swap for an R290 unit in my future!

Alot of heat pumps are now,

As I understand it the R290 is flammable and therefore the external unit should not be installed under a window. But probably different manufacturers give differing install instructions.

Incorect, flow temperature should be kept as low as possible, remain up to 6 on cycles per hour only then can customers benefit from the more energy efficient technology from Midea. Buffers buffers buffers, size them correct according to all system load on average that will be min 200l buffer for 8kw heat pump.

Its not being burnt, it's being used as a refrigerant. We try and find you some reading info a bit later.

Nightmare, what do they say, don't give up the day job.

I'd rather have this, than a larger smelly oil tank.

I don't need to, I have one......replaced the toxic oil tank.......

ultimaterenewables.com/

@@allthingsrenewable9017 So when cleaning the filter, I assume that it cuts off the flow from either the house or the heatpump, but not both ? Would it not need a cutoff on either side of it - or is there a cutoff in the house too ?

It will cut flow from both, so less fuss. I will do a little video to show , if that helps.

@@kenbone4535 No, that's perfect, that's what I hoped :)

If you can find that for me and send it over that would be great. The bigger picture tells me to use what I think fits.

@@allthingsrenewable9017 We had to use it for piping medical gasses, and it did specify the number of turns for the best result. My comment was not meant to be a criticism, more surprised. Not working now so have no access to our procedures. If I find it I’ll message.

@@1943L in my 30 years, I've never heard of a thing, TBH as we learn our skills we got to know that a certain rad valves may need a few more turns than another. The end goal is to stop it leaking, if some jobs worth is behind a desk making these rules up WOW, in the grand scheme of things, I'd have more pressing issues, then losing sleep over how many turns I used.

Can you expand on your thinking.

So you have no smart phones, no Wi-Fi, no tv, no computer, they all emit emf

www.cancer.gov/about-cancer/causes-prevention/risk/radiation/cell-phones-fact-sheet

Another one who will no doubt be using technology but won't accept anything that he feels will cost him more. EMF lol. Good excuse

🍑🤡

but natural gas being run into homes is fine? The amount of refrigerant is tiny compared to the amount of gas people have in the gas pipes in their homes, they already don't allow R290 in split units, so there isn't really any installer error involved.

This is my own property, it's down to the individual Manufacturer, we supply antifreeze valves, if that's what the Manu dictates. If your home is in a place where you suffer from prolonged power cuts around cold ambient conditions, then glycol would be better. Antifreeze valves drain the system, if then the power is returned, the end user has to intervene, or get an engineer back to get the system running again. With glycol, the system will just restart.

@@allthingsrenewable9017 It’s easy enough to refill system it it’s only filled with water. I did wonder if this was your own property. Thanks for sharing the video. I realised I might becoming over as a bit negative with my comments; thanks for responding positively!

@@tlangdon12 you say that it's easy to refill a system but believe me in my experience not everyone thinks like us. 😂🤔

@@allthingsrenewable9017Glycol reduces the Specific heat capacity of the circulating water and thus has a deleterious effect on COP.

They used to fill tractor tires with beet juice doesn't freeze and adds weight 😂

I've installed 100s on gravel without a problem. But thanks.

I think that it was more down to the fact that the heat pump in the Skillbuilder video wasn't level. That seems to have caused premature wear in the fan bearings leading to that awful noise. I guess that there is a risk with a non-solid base that an inexperienced owner could fiddle about with the substrate, unlevelling the heat pump resulting in reliability issues down the line.

I recall the issue with that installation was that the unit was installed with front bearing on brickwork and rear on gravel at lower elevation, so tilted to rear with excess wear on fan bearings and noise resulting. I personally might compact gravel before putting something heavy on it, but that’s important for new gravel primarily.

@@tomkacandes8286 not having a uniform substrate looked like a recipe for disaster, if it had been all gravel or all paving and level it would have stood a better chance.

What do the instructions say regarding a base? Problems can take years to show up.

Hi Brian, yes i have Octopus go. I have a 300 litre high gain cylinder, which i do charge at night when my rate is cheaper. In the summer months, the MyEnergi Eddie gives us the hot water for a good few months for few.

I have some experience of heat pumps. I live in Sweden where they are common. Most air source heat pumps here are being ripped out as they are not very good. In this house we live in now it had a ASHP that failed, we changed it with a Mitsubishi ecodan system, after 1 year we ripped it out and went with a ground source(vertical drillhole 600feet). Since then the GSHP has been perfect and very cheap. Why did we rip out ASHP. Noise was the first thing, once these thing get to 4 they switch to electric heating and in Sweden minus 10 in the winter is normal, when the unit freezes up it made a horrendous noise when it was defrosting, of course whilst its defrosting it provides no heat. Add to this the other various sounds it made,whilst defrosting it sounded like having a bus on tick over outside your house, this was supposed to be a very quiet system. Plus it could not keep the house warm enough. Here in Sweden these systems are common as there is no gas, so we can get hold of experts quickly. I can imagine in a few years this will be the next mis selling scandal as a lot of people find these things don’t deliver. People really need to do a lot of research on these things before spending money.

Just come across your comment. Yes ASHPs are less efficient in super cold places. I am currently in Canada where it got to -29 C when I was here 2 years ago. Discussing the future with my son in whose home I am staying and GSHP would be the solution here too. Of more importance would be decent building standards here. The timber home of 40/50 years of age has what appears to be 3" framing filled with fibreglass batts. It would make more sense to go to 9" framing and some builders make use of trusses comprised of 2 frame timbers joined by diagonally glued spacers/braces. That gives plenty of room for more insulation.@@JohnJones-k9d

This could be a yes and no answer, i would be concerned around the integrity of the underground pipework. A full heat loss would be the first thing, then take it from there, there are some good online tools like HeatPunk to give you a better understanding of fabric/heat loss.

I think the issue is the risk of a flammable gas leak in the house. But as we currently have a fossil gas main installed inside perhaps it's OK?

No Idea, i deal with split AC systems

@@joewentworth7856 my thoughts exactly

R-290 can do a lot with a tiny amount of refrigerant - a few ounces for a commercial fridge for example. The revised IEC standard for PFAS-free R-290 does not per se prohibit direct exchange (DX) or “split” 1:1 systems. Charge size limits how much gas is available, and equipment will have to do a few things to limit how much could become concentrated enough to ignite. If these things are done (automatic leak detection, automatic fan operation inside to disperse any leak, automatic “lock” to retain refrigerant in the outside unit). Think of trying to light a butane lighter with a match in a high wind - if not concentrated and volume is limited, no flame. This is being researched more now and don’t hold your breath for air-to-air DX R-290 before 2025.

There are a few on the market it seems - I stumbled across the EletricQ 3.5kW mini-split by accident and thought for £600 it wasn't a bad bet for cooling - yet to install it but looks straightforward...

Each manufacturer produces a graph of the cop at different outside and flow temperatures, and you could figure out what the most efficient gas was by comparing units that use different gases, but you are always including the efficiency of the unit in such a comparison.

new combi boiler because it saves you the expense of removing all the radiators to fit bigger ones that will be effective at the low temperature from these heat pumps

So far, it’s been around 3.5-4kw

Bottom end modulation has been an achilles heel and hard to get data from Manus.

So my old Samsung is a R410a 16kw, it can only deliver 55 degrees, its output capacity drops as the ambient drops. Saying that its a great unit, it again modulated down to around 3kw, with an input of just around 700 watts. The Clivet is a 12kw, it only start to loss capacity around -8/10 degrees. I've not seen it eat anything less than 1.2 kw.

​@@allthingsrenewable9017 Difficult to say because it's comparing output power to input power, but it sounds like that's something like a 40% minimum output on the Clivet vs. about a 20% min output on the Samsung. I wonder what the new 5 kW Samsung R290 will turn down to, and I wonder if anyone will come out with a "real" 3kW one?

Bicester, but have installers all over the UK

Yes exactly that.

Yes it would, but look at the hybrid inverter's output capacity. My inverter has a max of approx 3.5kw, so if your house load is more than this then you will pull from the grid. I don't know all the inverter figures off the top of my head, but I have heard some installs having two hybrid inverters which would.then allow you to have peak draw from the pack at 7kw. I've done this because I can and i have skill knowhow, the idea is I could also have wind turbine onto DC immersions. Too many ideas 😂