Octopus Heat Pumps

Reed_Richards

Okay
Bedroom 1: 

Center Type 22 Double Panel Double Convector Radiator 450 mm x 900 mm 4135 BTU

Kitchen (No, 2)

Center Type 22 Double Panel Double Convector Radiator 750 mm x 700 mm 4910 BTU

Office

Center Type 21 Double Panel Single Convector Radiator 600 mm x 700 mm 3200 BTU

I wonder why not a type 22 in the office?  

Spies

Thanks, that explains it, my question was somewhat badly worded!

Spies

Reed_Richards said:

Okay
Bedroom 1: 

Center Type 22 Double Panel Double Convector Radiator 450 mm x 900 mm 4135 BTU

Kitchen (No, 2)

Center Type 22 Double Panel Double Convector Radiator 750 mm x 700 mm 4910 BTU

Office

Center Type 21 Double Panel Single Convector Radiator 600 mm x 700 mm 3200 BTU

I wonder why not a type 22 in the office?  

The 'office' would likely get way too warm if running on pure weather compensation, this is my weirdly laid out house for you to raise even more questions 

Reed_Richards

So @Spies, I guess the difficult area is your living room which requires two long and chunky radiators to match the heat loss.  If you wanted a lower maximum flow temperature you would have to cram more radiator area into that living room.  Is there scope for a third radiator or would that ruin the look?  It could be vertical.  

Spies

Reed_Richards said:

So @Spies, I guess the difficult area is your living room which requires two long and chunky radiators to match the heat loss.  If you wanted a lower maximum flow temperature you would have to cram more radiator area into that living room.  Is there scope for a third radiator or would that ruin the look?  It could be vertical.  

It's definitely possible, there could be another radiator on the party wall which would be behind the sofa, but it wouldn't be cheap to do as it would involve cutting up the fibreboard and running new pipes

Reed_Richards

But if you decided you didn't want to go with Octopus and their 50 C flow you would have to do something like that to enable you to run at a lower flow temperature.  You could run pipes behind extra-wide skirting from one of the radiators.  Plus you would need bigger radiators elsewhere too, but hopefully that's easier.  

The office would not get too warm, even on pure weather compensation because you would adjust the flow to reduce the heat output as necessary.  But you misunderstood; I was thinking that instead of a type 21 radiator you could have a type 22 with smaller length by height to achieve a similar output.  

Spies

Money no object, I'd have heat geek come, but I have to consider what I'm paying here and the end result!

Reed_Richards

Absolutely. 

If you added a third radiator of the same size in the living room you would boost your coverage to 156%.  So if it were me I would look up what radiator sizes I would need to achieve 150% or more in all the other rooms.  Bigger radiators would probably add very little to the total cost (and you could price that yourself) but extra radiators probably would because of the extra fitting required.  So if you could achieve 150% coverage throughout then you could run at a significantly lower flow temperature (delta T a bit less than 20 C, I think).  But there might not be room for bigger radiators or the look might be ugly.  Thinking about your options might help you decide.  

MP1995

Spies said:

Money no object, I'd have heat geek come, but I have to consider what I'm paying here and the end result!

Do you have an idea how much more it would be with heat geeks? Is that a saving you can make on running costs for however long you intend to live there?

wrf12345

I would be quite happy at a constant 10 degrees C during the winter months, does this have a radical or minor affect when running high temp heat pumps compared to having a near tropical temperature in the house?