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  # 2229767 2-May-2019 21:21
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I've read that heat transfer is mostly useful from fireplaces, as the loss in the ceiling cavity is quite high. If you push 23 degree air from a heat pump into a 17 degree room with a degree of loss in the ceiling cavity you need a lot of volume to warm the room, whereas 60 degree air from a fire the volume is much lower.




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  # 2229950 3-May-2019 09:25
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Yes, I've also read somewhere that heat transfer kits are only useful/effective if you have a high output heat source such as a fireplace.. We don't have one and don't fancy putting one in our place either so I haven't really considered it. Happy to be corrected. 

 

Thanks for your "real world" example with costs Wheelbarrow01, much appreciated. We're not too keen on the idea of pumping insulation into our walls, have heard too many nightmare stories and I don't think our house is suitable for that method anyway. As I've said previously, we do intend on renovating the bedrooms at some stage - i.e. full strip out and insulating; but the time and inconvenience factor is a pretty big turn off right now. 

 

In relation to underfloor insulation and ground sheet - I do want to do this, but the limited clearance and none access has led me think it would be too difficult or not possible. Anyone been in the same situation and able to tell me otherwise?

 

To answer another question above, no I don't think this is our 'forever home', but we do plan on being here for at least 4 or 5 years. Possibly even longer. So do want to make it as comfortable as possible in the meantime. 

 

FWIW - we had no condensation issues last night; and our lounge/kitchen/dining room still had some residual warmth this morning that didn't require any heating.. But then again i see the overnight low in chch was a balmy 10C..


 
 
 
 




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  # 2230783 4-May-2019 12:54
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So does anyone have any suggestions/comments for underfloor insulation and whether or not it would be possible in my situation?

I do think our sub floor is causing most of our dampness issues, so would like to hear if anyone has been able to lay a ground sheet with minimal clearance..

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  # 2230790 4-May-2019 13:12
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How much is minimal? You need to be able to get a person in their to lay it, and anchor it or tape it to piles. I had it done under my house, they got to most of it which made a big difference.




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  # 2230802 4-May-2019 13:19
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Well part of the issue is we don't have internal access to the underfloor. No exposed floor boards in the house so will be a pain to do..

Looking through the vents in our foundations and there would be less than 30cm I'm guessing..


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  # 2230803 4-May-2019 13:21
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Then it would be a major exercise to put down a ground sheet or under floor insulation. You'd possible have to take the whole floor up. I'd only do it if you had a huge amount of damp coming up.




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  # 2230809 4-May-2019 14:03
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Thanks. Yes I thought as much.. We don't have a massive damp problem, but there is a residual smell/odour that I'm attributing to the sub floor..

Guess it only leaves me with insulating walls and/or double glazing, or the original ducted heat pump system (or indendent heat pumps in each room - but not entirely a big fan of this). Seems like a split consensus from the responses so far.

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