Tempest Hi-Flow

[haythorn_1]

Looking to order a UVC soon from Telford for my ASHP setup. Does anyone know when you would use the hi-flow variant versus the normal one?

 

https://www.telford-group.com/product/tempest-heat-pump-pre-plumbed-simplified

 

https://www.telford-group.com/product/tempest-heat-pump-pre-plumbed-simplified-hiflow

[JohnMo]

Think the only difference (I see) is the 3 port valve and possibly a different pump if you needed one.

 

Small heat pump, ordinary one ok, big heat pump high flow would be my take on it.

[Nickfromwales]

3 hours ago, haythorn_1 said:

Looking to order a UVC soon from Telford for my ASHP setup. Does anyone know when you would use the hi-flow variant versus the normal one?

 

https://www.telford-group.com/product/tempest-heat-pump-pre-plumbed-simplified

 

https://www.telford-group.com/product/tempest-heat-pump-pre-plumbed-simplified-hiflow

Speak to Trevor at Cylinders2go and mention my username and the forum. He’ll look after you with a price for the Telford kit. Lots of others here have bought from them. 

[haythorn_1]

2 hours ago, JohnMo said:

Think the only difference (I see) is the 3 port valve and possibly a different pump if you needed one.

 

Small heat pump, ordinary one ok, big heat pump high flow would be my take on it.

What counts as small though?

 

1 hour ago, Nickfromwales said:

Speak to Trevor at Cylinders2go and mention my username and the forum. He’ll look after you with a price for the Telford kit. Lots of others here have bought from them. 

Definitely will, thanks!

[JohnMo]

52 minutes ago, haythorn_1 said:

What counts as small though?

6kW and lower I would say. 

[Nickfromwales]

They both seem to have the same coil surface area, so not sure what high flow actually refers to here. 
 

Ask Trevor for a proper explanation is my 2 cents. 

[JohnMo]

38 minutes ago, Nickfromwales said:

not sure what high flow actually refers to here. 
 

Different 3 port valve and pump

 

Edited July 8, 2025 by JohnMo

[Nickfromwales]

57 minutes ago, JohnMo said:

Different 3 port valve and pump

It's just a jump up to 28mm from 22mm then. Scan read it whilst multi-tasking, which never goes well.

 

TBH all the Telford cylinders at 250L and upwards come with 1" BSP (so 28mm) connections/coil, so not sure any would impacted by being on 22mm if the cylinder volume is that much lower and it had less work to do?

[JohnMo]

3 minutes ago, Nickfromwales said:

It's just a jump up to 28mm from 22mm then

No, both are saying 28mm 3 port valve, possibly an esbe on the high flow and something like a Honeywell on the other.