Haier R290 Monobloc

[JohnMo]

19 minutes ago, SteamyTea said:

Does it do internal and external temperatures?

It does external and assumes 20 deg internal.

[JohnMo]

34 minutes ago, SimonD said:

One piece of kit for helping with this, that I'm seriously looking at is Adia

That's an interesting bit of kit

A video here

https://youtu.be/9sHmHa5ha_4?si=mir2dQesUXf0Aqgn

[JohnMo]

1 hour ago, SimonD said:

seriously looking at is Adia

Just found a price, £1500, smart but... if offsetting getting new radiators, new plumbing and paying for an engineer to optimise your system, then small beer. New build where you should know exactly wall, floor and roof buildup and get heat losses quite accurate and your installing new piping and radiators anyway, not really needed. But would idiot proof a lot of installs, assuming heat pump is massively oversized.

[SimonD]

24 minutes ago, JohnMo said:

Just found a price, £1500, smart but... if offsetting getting new radiators, new plumbing and paying for an engineer to optimise your system, then small beer. New build where you should know exactly wall, floor and roof buildup and get heat losses quite accurate and your installing new piping and radiators anyway, not really needed. But would idiot proof a lot of installs, assuming heat pump is massively oversized.

 

Yes, absolutely, it could be a game changer in that context. From discussions one of the ideas behind it is that it's about taking the guesswork out of the system design so instead you put in the Adia with the heat pump to get a proper understanding of how the system works and then propose essential changes based on real world measurements. The only issue and question I've got about this approach in retrofits is the application of VAT because the VAT examption on installs is defined as single supply. Technically you could probably get away with it but I do wonder how the conversation with the HMRC might go if they questioned you.

[JohnMo]

1 hour ago, SimonD said:

the heat pump to get a proper understanding of how the system works and then propose essential changes based on real world measurements.

I've seen that way of doing things mentioned several times and the real world a lot of building could get away without much in the way of radiator changes.

 

VAT, include a contingency (deposit) to return assess and make x pre priced changes - fully refundable, less second visit service charge? Explain you could remove that charge, but full VAT, plus any grant funding, that was too have been included, would be payable for the second visit.

[SimonD]

27 minutes ago, JohnMo said:

VAT, include a contingency (deposit) to return assess and make x pre priced changes - fully refundable, less second visit service charge? Explain you could remove that charge, but full VAT, plus any grant funding, that was too have been included, would be payable for the second visit.

 

This is certainly a contender for how to manage it as there are already jobs where installing a volumiser, for example, might be priced but in the end it's unecessary so reduce the final invoice. The thing about single supply is that it depends on perspective. So if a customer considers all of the job as a reasonable single supply, then that is permitted at least in theory, even if there are several invoices.

[Beelbeebub]

If the goal is accurate capture of the radiator/heat loss situation could the unit be plumbed in as part of the survey - left for a week to do it's thing and then report what radiators need upgrading, what the flow balance situation is etc.  Removed with the install.