Air Sourced Heat Pump.

I suspect most gas fitters are totally out of depth at the pressures and types of gas in a heat pump. As others have said it is more like air con - the requirements to work with F gas are 

https://www.gov.uk/guidance/qualifications-required-to-work-on-equipment-containing-f-gas

not the same at all.

Mind you modern systems containing propane and other non fluorinated gasses are not treated quite the same.

Mike

O.M.G. whatever next?

Primary school children should be taught how to stage climate change protests, teachers say | Daily Mail Online

Z.

If you use an inflammable gas in the heat pump you probably need to be GasSafe registered, or perhaps they haven't thought of that yet!

Interestingly that is another area where the “Greens” have scored an own-goal. Propane etc are less efficient in a heat pump system than the older Freon types, and ammonia is not favoured due to its ability to explode, but it is used in large systems like cold stores. At least one can smell the leaks.

davezawadi (David Stone): 
 

Interestingly that is another area where the “Greens” have scored an own-goal. Propane etc are less efficient in a heat pump system than the older Freon types,

Also, freon is heavier than air and had no effect on the ozone layer. Remember that one!

Around fifteen years ago I was working for an upmarket kitchen company and ended up being the guy who retouched the paintwork on expensive hand made kitchens, being the only person with enough patience.

To cut a long story short I had  refinish a mantelpiece over an Aga cooker with a distressed paintwork finish, because it had been made in England then sent to France to be painted, as the French said they could not make an English style mantelpiece to match a French kitchen, but they then obviously didn’t get the same guy to do the paintwork whilst painting the rest of the kitchen.

It was sprayed white, then yellow and buffed back to expose  the undercoat and timber on wear points before being sprayed with “dirt” to add patination, all in acid catalyst paint that gives you less than ten minutes to work with it once it’s mixed.

The paint had been sent over from France and I asked the boss to get me some air brushes and a small compressor, he sent the air brushes and come disposable cans of “compressed air”.

What I then discovered is that it was actually illegal to sell disposable cans of compressed air, so propane had been added to it to make it legal.

So the first thing  to do was to turn the oil fired Aga off and open all the windows.

Unfortunately I made too good a job of it, so got another one to do, retouching a mantelpiece over an oil fired Aga with cellulose paint using air brushes supplied with an air and propane mix.

That has to be a couple of holes in the ozone layer.

Some AHPs require plumbing to an internal heat exchanger and use a low ozone depletion refrigerant. The installer needs to be qualified to work with these gases. The more common AHPs (monoblock) just plumb in to the radiator/hot water circuit via a buffer tank and just have glycol antifreeze as per normal indirect heating. These systems can be easily installed by any competent person. They just comprise a compressor with sealed refrigerant circuit, fan, pump and control circuits. It is recommended that SCOP is used for design as this takes seasonal factors in to account unlike COP. The “new build” would be eligible for RHI payments is it was designed correctly and achieved the required Environmental Performance Certificate. Payments are only payable after all the building envelope details (walls, floors, windows, insulation etc) are submitted and heat loss calculated and deemed acceptable for payment. Therefore if the owner was complaining about the cost is it possible they do not get RHI because the design was deficient?