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Posted

What are pros and cons for underfloor vs no underfloor? More elaborate heat exchange systems?

Likely need to move from area in a few years so don't want to go over the top with luxury/costs.

Posted (edited)

Dead easy and cheap in a new Build, more difficult and more work in a refurb. UFH suits an ASHP set up.

Edited by joe90
  • Like 1
Posted
55 minutes ago, tonyshouse said:

Insulation is cheapest long term option 

Insulation of entire envelope, presumably.

Currently quite a lot of glass facing north. Is that foolish?

Posted
3 hours ago, WWilts said:

What are pros and cons for underfloor vs no underfloor?

Assuming ground floor, UFH can loose more energy to the ground, which generally has a lower temperature for longer parts of the year.

On a second floor, it should realistically make no difference.

 

If by 

3 hours ago, WWilts said:

More elaborate heat exchange systems

you mean mechanical ventilation and heat recovery, then no practical difference as that is to do with air changes and not the losses though the walls, floors, roof, windows, doors etc.

59 minutes ago, WWilts said:

Currently quite a lot of glass facing north. Is that foolish?

Depends on the view and if you are an artist.  If the thermal losses are manageable, then no problem.

Near me is a small cove, if a house has a south view, it would be of industrially scarred land, but the north view is of the Atlantic.

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Posted
2 hours ago, SteamyTea said:

Assuming ground floor, UFH can loose more energy to the ground, which generally has a lower temperature for longer parts of the year.

On a second floor, it should realistically make no difference.

 

If by 

you mean mechanical ventilation and heat recovery, then no practical difference as that is to do with air changes and not the losses though the walls, floors, roof, windows, doors etc.

Depends on the view and if you are an artist.  If the thermal losses are manageable, then no problem.

Near me is a small cove, if a house has a south view, it would be of industrially scarred land, but the north view is of the Atlantic.

Very illuminating points, thanks

Posted

If you can afford it a physics model of the house will help you by informing decisions and optimising things, lots of glass = lots of problems with heat loss and heat gains, west facing can be worst for overheating 

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Posted
10 hours ago, tonyshouse said:

If you can afford it a physics model of the house will help you by informing decisions and optimising things, lots of glass = lots of problems with heat loss and heat gains, west facing can be worst for overheating 

Thanks! Noted.

Posted

i wouldn't say underfloor is cheap its probably 4-5x more expensive than a gas combi and rads.

 

All depends on what spec you are aiming for, bargain basement the go for it. If you are going to live there a while or want to realise top end price for it then look at underfloor, 2600 ceilings etc

 

Personally would never go back to rads, even upstairs now. 

 

 

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