Vaillant Heat Pump and Mixergy tank installation experiences - Dorset, UK 

Thanks for your kind comments. I am sure that you will get an excellent job from Heat Geek. The installer choice is even more important than the heat pump choice!

It is proving to be a good journey so far here. Thanks!

Yes, it used to be the outside loo - just big enough for the equipment.

Yes - it was the upside of the planning delays!

Yes, we did wonder sometimes ... But it was worth it certainly.

Thanks for the comment!

Thanks for the comment. Yes, we are running with pure weather compensation set on the heat pump.

The heat pump is bolted onto those rubberised feet and seems pretty stable. The ground underneath seems very stable, so I'm hopeful, but it is a good idea to keep an eye on it for a continued level placement. Thanks!

There was a heat loss survey done, whether it was accurate is hard to say. The upstairs bedrooms have angled ceilings which are pretty close to the roof, and I'm not convinced they were accounted for in detail. We have the Vaillant indoor display with the temperature gauge on it, and an OEM thermostat for reference in the lounge. The heat pump id set to weather compensation and it seems to do a good job for us, as well as seeming to be efficient. We do have TRV's on the radiators to give some adjustment if needed.

Yes, it might be larger than absolutely required, but it does seem to run efficiently.

Thanks for the comments. You are right, the guttering in the video was a temporary arrangement. It now runs to the existing downpipes from the roof by being extended above the heat pump. We had to wait until the gas boiler had been removed to be able to do that part. All good fun!

It is split, with the heat extraction being done by the outdoor unit, the refrigerant carrying the heat to the indoor unit, and the heat being exchanged there to the water - for the radiator circuit or the hot water cylinder. It is a more complex install, but it got round the issue we had with the R290 refrigerant since it uses R410a instead. Not so environmentally friendly, but it is unlikely to have a leak I hope.

@@jeffjsmith Thanks for the reply, ah yes when i looked again i see the difference.

The issue with proximity to windows was the problem using the standard mono block Arotherm Plus which uses R290 refrigerant - propane. This led us to use the AroTherm Split which uses R410A which doesn't have the installation constraints.

Yes, it did seem crazy that we are being encouraged on one side to help in reaching net zero, and on the other hand public health is inflexible. I do believe that this will be sorted out soon, I certainly hope so. The saving grace was that due to the delay we got a bigger boiler upgrade scheme grant!

Decibels are not linear.

Ok , so the point really is if it were that close why apply the rule so rigidly ? You surely get the point in the current environment using what borders on petty bureaucracy to put obstacles in the way of someone trying to do as requested , it’s pencil necks gone mad .

We did make a reasonably push against the Planning people - but our life is too short and we actually ended up with a better solution I think. But the process does need sorting out.

the problem came from installation guys at the start(years ago) installing them too close to neighbours windows in old small 1 bedroom quarry mens cottages etc. the units were LOUD. lines were drawn and DB levels need to be followed. its great having an environmentally friendly holiday/permanent home but not at neighbours expense. lovely couple glad they persisted and worked around it. btw personally i agree with you very doubtful in that instance it would have caused a problem, maybe it was too close to that bedroom window? people should be allowed to leave their windows open and have a good nights sleep during warm weather. fans and internals dont sound like they used to, octopus should go back to dakin and make their heatpump designers aware so they can bring their units inline.

It did feel like that at times!