Can anyone recommend a small monobloc ASHP and UVC?

[Dave7338]

Summary

 

2-bed, well insulated flat. Replacing storage with ASHP so also need to install UVC. Self install with a plumber so trying to keep simple.

 

Can the pros here please recommend me a….

 

• Good quality Monobloc heat pump.
• Decent UVC and associated kit for a 800 x 900 cupboard, around 180 L.

 

I’m happy to pay for anything to make this a simpler job, for example a pre-plumbed UVC or some kind of kit that includes lots of compatible components.

 

 

The long read

 

I’m renovating my small 2-bed flat and replacing storage radiators with a heat pump. Unfortunately round here I can’t find a (recommended) installer as they're all too busy, so I’m looking at specifying / buying it myself and installing using a regular G3 plumber. Might even be cheaper that way 🙂

 

I’m insulating internal walls & roof & putting in good windows, so by my calculations the building will loose around 1.5 - 2 kW in cold weather once this is done. I guess on top of this the heat pump also needs to provide for the hot water.

 

I’ll use a plumber who can install an UVC as they should be familiar with that part. I’ve been looking at slimline UVC’s to fit in a cupboard sized around 800x900 (smaller the better).

 

On the ASHP, I think a monobloc design might be appropriate as then doesn’t need a specialist engineer for the refrigerant, and I don’t have much space inside for plant.

 

[joth]

For a small flat you might want to consider air to air heatpump as well, it can work out simpler. (And provides more effective cooling, if that's of interest). That wouldn't do DHW thought  - what do you currently use for that?

 

What emitters will you use? New radiators, sized for heat pump?  

 

2kW is a very low a heat demand, but the ecodan 5kW plus pre-plumbed tank would be one to look at. You'll very likely need a reasonable sized buffer tank, unless you're putting in lots of rads or UFH.

https://les.mitsubishielectric.co.uk/products/residential-heating/domestic/outdoor/ecodan-r32-ultra-quiet-puz-monobloc-air-source-heat-pump-2

[JohnMo]

Joules do a unit that's on the top of a tank or standalone and can provide the level of heating you require also.  I think you have to go through them direct as I never been able to find a price.  There is no outside unit, works as a MEV system (combined continuously extracting) so single hole in wall.  Or you could take in external air also I would think.

 

 

https://jouleuk.co.uk/victorum-exhaust-air-heat-pump-compact/

 

https://jouleuk.co.uk/victorum-exhaust-air-heat-pump-pre-plumb-system/

[Dave7338]

15 minutes ago, joth said:

For a small flat you might want to consider air to air heatpump as well, it can work out simpler. (And provides more effective cooling, if that's of interest). That wouldn't do DHW thought  - what do you currently use for that?

 

Yes, I did look at that, but decided that air-water would be quieter, kick up less dust, and would also mean much cheaper hot water. But thanks for the idea.

 

16 minutes ago, joth said:

What emitters will you use? New radiators, sized for heat pump? 

 

Yes going to install new rads, hopefully not too large if I insulate well.

 

17 minutes ago, joth said:

2kW is a very low a heat demand, but the ecodan 5kW plus pre-plumbed tank would be one to look at. You'll very likely need a reasonable sized buffer tank, unless you're putting in lots of rads or UFH.

 

Thanks. I was hoping to avoid a buffer tank as more space and complexity, but will have to look into that I guess.

 

Dave

[SteamyTea]

 

[PeterW]

4 hours ago, Dave7338 said:

Thanks. I was hoping to avoid a buffer tank as more space and complexity, but will have to look into that I guess.

space wise they can go under a UVC or be wall mounted. Complexity ..? No moving parts, just tee them into the flow and return to the manifold. 

[MikeSharp01]

8 hours ago, PeterW said:

No moving parts, j

But there is heat loss so ensure you get a very well insulated one.

[HughF]

Mitsi ecodan 5kW with pre plumbed cylinder. If you’ve got a van and can travel, there’s a new unit on Facebook marketplace in Bristol for £2k, complete package including ftc6 and 150ltr uvc

 

I haven’t finished my sizing calcs or I’d have snapped it up already, my gut says it’s a bit small.