New build - underfloor heating - heating pump

chidorisai

Hello,

I am getting a new house which is not yet finish to be build.
The BER rating will be A3... Following my reading on this forum .. This cannot be see as trustworthy... Anyways. The house will be isolate : ground/ext wall/ roof. Double galzing and a solar heating water.

The house will be 130sq/m (2lv) equipped with gas.

I wish to install to udf heating on both level and an heat pump air to water....

What will be you thought on that ?

Thanks

esox28

So you'll have it all...solar, gas, ashp.

What heating requirment does your new build.? Or existing house require?

chidorisai

I am not sure i understand the question.
Talking BER or ?
The house is by defaut A3... And i want to add ufh and hp aw.

esox28

Ok so before you start building you will need an engineer to compete a provisional ber. The eng. using deap software will input you builds wall, roof,floors,windows and orientation into account giving you a calculation expressed in w/m*/year.

He will be able to calculate your heating load/demand! Then you can decide on what heating system or combination of heat scources that best suits your needs.

Imo with a house of 130mtrs* I would be trying to push for passive levels of construction. Insulate right and build air tight.

BryanF

esox28 wrote: »

Ok so before you start building you will need an engineer to compete a provisional ber. The eng. using deap software will input you builds wall, roof,floors,windows and orientation into account giving you a calculation expressed in w/m*/year.

He will be able to calculate your heating load/demand! Then you can decide on what heating system or combination of heat scources that best suits your needs.

Imo with a house of 130mtrs* I would be trying to push for passive levels of construction. Insulate right and build air tight.

+1
Also I'd be going for triple glazing, no thermal bridges, 0.1wm2k floor insulation for ufh, no drylining, no open fires etc before confirming heat sources

Why have gas & HP?

chidorisai

Hi,
Thanks for the response.

To bring more light to the question, i am not designing the house as i am going to get a replica of the show house which has a A3 rating with the feature hilighted above. But instead of getting rads i am going to ask if possible or replace them by ufh.
Regarding 'why gas & HP' this is more about cost efficiency....

hfallada

Why are you even considering putting in double glazed windows? Triple glazed is so much better and marginally more expensive

chidorisai

Hfallada, agree this is on my request list.
What I said earlier explain that some decision are nit in my hand :

To bring more light to the question, i am not designing the house as i am going to get a replica of the show house which has a A3 rating with the feature hilighted above. But instead of getting rads i am going to ask if possible or replace them by ufh.
Regarding 'why gas & HP' this is more about cost efficiency....

BryanF

chidorisai wrote: »

Regarding 'why gas & HP' this is more about cost efficiency....[/I]

I think you could do with some help, best get someone in your corner firmilar with such things.