Octopus heat pump, do they still supply Daikin

[DanielE]

Hi, 

 

I have bought a 4 bedroom house, in Surrey, on the border with London. 

 

The house is a 2021, and I am considering getting a heat pump. 

 

Anyway I am considering a heat pump as I have 4 bedrooms. However I want a Daikin and not the cosy system. Do Octopus still install Daikin, or do they only install the horrible looking imho, Cosy pumps? 

 

Has anyone decided to just go for air to air heat pumps instead? 

 

Thanks 

[Gone West]

5 hours ago, DanielE said:

Has anyone decided to just go for air to air heat pumps instead? 

I would go for A2A if it was just up to me, but we will have a new oil boiler. I guess you have a gas boiler at the moment, and if that is the case, I would keep it if there were no problems with it.

[S2D2]

I self installed an A2A unit a few years ago then had Octopus install a Daikin A2W in January. You could still choose at that point, check at the survey stage.

 

Not that they should in a 4 year old house but dont let them install the 9-14kW version. 4-8kW are all the same just limited by software.

 

It's personal preference but I vastly prefer A2W now I've had both, it also covers your hot water.

[DamonHD]

6 hours ago, DanielE said:

Hi, 

 

I have bought a 4 bedroom house, in Surrey, on the border with London. 

 

The house is a 2021, and I am considering getting a heat pump. 

 

Anyway I am considering a heat pump as I have 4 bedrooms. However I want a Daikin and not the cosy system. Do Octopus still install Daikin, or do they only install the horrible looking imho, Cosy pumps? 

 

Has anyone decided to just go for air to air heat pumps instead? 

 

Thanks 

Yes, just did for me in November:

 

https://www.earth.org.uk/heat-pump-16WW-control.html

[JohnMo]

6 hours ago, DanielE said:

Octopus still install Daikin

Why limit yourself to octopus or Daikin?

 

Don't octopus use a design temperature of 50 degs for heating? A design temp of closer to 40 would be way better for efficiency.

[DamonHD]

I adjusted the weather comp curve immediately, so we don't get up to 50.

[S2D2]

34 minutes ago, JohnMo said:

Why limit yourself to octopus or Daikin?

 

Don't octopus use a design temperature of 50 degs for heating? A design temp of closer to 40 would be way better for efficiency.

Yes, but if you get a good surveyor they will let you oversize the rads to cover 150% of the heat loss (at design temp 50). Combine that with the fact they have to use MCS air changes rates and you can drop the flow temp from their design. Mine came out of heat punk at 42 based on their "design at 50".

[DamonHD]

Well yes, I had Octopus redo the calcs with some extra information and the heat loss was halved and only one rad needed swapping.  Octopus has to tick some MCS audit boxes, but are open to rational haggling in effect.

 

After some observation including a couple of days that hit design days (-2C outside) I adjusted my weather comp to (50°C/-7°C, 25°C/14°C).

 

https://www.earth.org.uk/heat-pump-16WW-control.html#weather