I am coming to the end of my build and been having problems getting someone to come and install my RED heat pump which comes with its DHW tank. Does anyone know of a good installer of ASHP who will be willing to do this job for me? I live not far from Cambridge

Thank you

What about some local air con installers?

 

Red do things their own way, so make sure it's someone who reads and understands the blurb...

29 minutes ago, dpmiller said:

Red do things their own way, so make sure it's someone who reads and understands the blurb...

+1 to what he said..! Never seen a Red tank in the flesh and they are all plastic from the description - all the blurb I’ve ever got my hands on has been artists impression and computer generated. 
 

 

It's the Harlequin Heatstream tank, but I don't know what mods if any they've done to suit the particular app. I'm thinking more of their zoning/ hydraulic seperation technique- a PWM-controlled pump for each zone with all control from the fancy touchscreen.

It does seemed to be aimed more at the commercial/ small school/ nursing home scenario where cascading is a benefit.

If you are looking for a "heat pump specialist" I suspect those will only work on the systems they know and have done the manufacturers courses for.  Look instead for a good plumber and a good electrician.  The "good" bit meaning they are willing to do something a little outside their normal scope and above all are prepared to read the manual and follow it.  Any plumber and electrician that can read and apply what it says in the manual should be able to do this.  I fitted ours as my first ever heat pump and have since wired another on a new build.  It is not difficult.

45 minutes ago, dpmiller said:

It's the Harlequin Heatstream tank, but I don't know what mods if any they've done to suit the particular app.

Thanks ..! Thought it looked familiar ..! Downside is that is a thermal store so tbh it is pretty useless at 55°c from an ASHP unless they have really cracked the 70°C barrier somehow with their “innovative” design of the ASHP which apparently has no resistive back up.
 

@Balraj Appadu any reason for choosing this over a standard setup ..? 

@PeterW have been reading through the voluminous posts regarding TS vs UVC vs Sunamp in combination with an ASHP (at 35deg for max COP) and some Solar PV + Battery for Enerphitish project.

 

Am leaning towards UVC or TS, though have noticed that Sunamp have just released their Thermino, though little info on this yet.

 

Re UVC vs TS, my assumption both could take advantage of ASHP water at 35deg,

1. UVC  - this would require the equivalent of a TS (small, and I know perverse) purely to exchange heat from ASHP water to mains for supply to UVC which would then be boosted by Immersion(s). Unless, there are UVC that also have heat exchange capabilities?
2. TS, such as Harlequin Heatstream would exchange ASHP 35deg to tank and then be boosted by an Immersion (the Harlequin spec includes an immersion).

I am assuming that both 1. & 2. would produce the same result bar tank heat loss rating.
 

However, would there be different stratification of water between 1 & 2 - cannot make my mind up about this. Have seen some manufacturers have different solutions, e.g. "nozzles" for injecting water into tank but this may just be hype.

 

If ASHP 35deg (thereabouts) cannot be used as starting temp for either UVC or TS solution, then running an ASHP at 50 deg plus is cheaper re electricity capacity. 

 

Its a shame about the Sunamp but seems to risky from what I have read.

 

My goal is partially driven by wanting to minimise my reliance on utilities given future prices and possible disruption and am prepared to spend my hard earned cash to do this ... though with hopefully a bit of common sense!

 

Cheers

 

 

3 hours ago, offthepiste said:

e.g. "nozzles" for injecting water into tank but this may just be hype.

I suspect it very much is.

 

But you may want to read this report (then tell us all what it says)

 

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/198850/hot_water_cylinders_buffer_tanks_heat_pumps.pdf

2 hours ago, SteamyTea said:

I suspect it very much is.

 

But you may want to read this report (then tell us all what it says)

 

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/198850/hot_water_cylinders_buffer_tanks_heat_pumps.pdf

Thanks for this.The buffer section was very interesting! I am going to insulate a bit more the buffer terminals and my hot water tank. 

6 hours ago, Marvin said:

I am going to insulate a bit more the buffer terminals and my hot water tank.

I insulated the cupboard they are in as well.

Just make sure any wiring can cope.

1 hour ago, SteamyTea said:

I insulated the cupboard they are in as well.

Just make sure any wiring can cope.

Yes that was already on my list. I PIRed the timber frame walls to that part of the utility room already.

12 hours ago, SteamyTea said:

I suspect it very much is.

 

But you may want to read this report (then tell us all what it says)

 

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/198850/hot_water_cylinders_buffer_tanks_heat_pumps.pdf

Hi SteamyTea, thank you for this... will have a look. Cheers

8 minutes ago, offthepiste said:

will have a look

Report back as I have not read it since it's release.

And there is much more fun things to do, like watch the crowd building outside Derek Thompson MP's office. 

Ref the options I am considering... and just about to digest the paper @SteamyTea has provided... the other possible option is the direct electric heating route, e.g. willis heater or similar. Gut feel is that heating on demand with no standing / mixing water would be the most efficient especially is heated as close to the coal face as possible.

 

However, I have seen comments, and from I can google, there is no solution which could fill a 100l bath in a sensible period of time. Again, ideally would like to leverage the 35deg ASHP water via a heat exchanger such as at the lowara https://docs.rs-online.com/a006/0900766b81610cf1.pdf. Cheers

A key point for me was about the cycling of the ASHP.

 

Also the relationship between the  size of the ASHP, the size of the  buffer tank the volume of the system and how its related to the thermostatic valves on radiators.

 

Need to make a few adjustments....

 

Good to read a propper report. Thanks @SteamyTea for the info

The report compares boilers with Heat pumps and the systems they use.

 

I think it was comissioned to see if heat pumps were a viable alternative to boilers.

 

For the first time I understand the significance of a buffer tank and am glad I have one.

 

One of the points it makes is that depending on what emitters and what emitter controls your using will lead to the conclusion on if you should have a buffer tank and what size.

 

Edited December 10, 20214 yr by Marvin
Add info

One of the problems identified was the lack of space in existing housing stock for a suitable hot water tank and buffer tank!!!

On 17/08/2021 at 20:19, Balraj Appadu said:

I am coming to the end of my build and been having problems getting someone to come and install my RED heat pump which comes with its DHW tank. Does anyone know of a good installer of ASHP who will be willing to do this job for me? I live not far from Cambridge

Thank you

Hi,

 

Sorry for the thread revival but I'm wondering how you have got on with the RED heat pump through the last few months?

 

I am considering the 16kW unit but coupled with the Mixergy cylinder rather than their own HeatStream due to capacity Vs cost Vs physical space required.

 

Thanks,

Colin