Fitting HRV

blacktea

Hi all, hope you can help,

I have planning for a house, a 1.5 storey build. Initially I had not considered hrv but now I intend installing it to meet partl 2012 regs. My question is can hrv be fitted between 225mm timber joists between ground first floors which are part of the original design?

Thanks in advance

mfceiling

blacktea wrote: »

Hi all, hope you can help,

I have planning for a house, a 1.5 storey build. Initially I had not considered hrv but now I intend installing it to meet partl 2012 regs. My question is can hrv be fitted between 225mm timber joists between ground first floors which are part of the original design?

Thanks in advance

Probably could be, but what happens when you need to turn it and the joists only run in one direction?

blacktea

mfceiling wrote: »

Probably could be, but what happens when you need to turn it and the joists only run in one direction?

that's my concern mf.

I plan on building slightly higher ridge as it is so would rather avoid having to increase the ridge further to accomodate a dropped ceiling.
Was originally planning on solid 225 joists running front to back throughout but would mean having a number of drops (3) from attic. Not sure if this feasible or good practice? Other option possibly to use lattice joists but don't know much about these strength wise. The spans are about 4 meters for joists.

fclauson

Lattice joists can go a long way but cost

Number of manufactures out there us Jr google to find

Issue with them is 6in duct will not fit through the W shape so you need to look at how you will run ducts of sufficient diameter to achieve air flows

blacktea

fclauson wrote: »

Lattice joists can go a long way but cost

Number of manufactures out there us Jr google to find

Issue with them is 6in duct will not fit through the W shape so you need to look at how you will run ducts of sufficient diameter to achieve air flows

thanks fclauson. I think it might be worth looking into the lattice joists further to see options available and maybe give a hrv installer a call

BryanF

http://www.kingspancentury.com/cent/product_l_joists.html

might be worth a chat with these also

JD6910

forget timber and go with a concrete first floor - best money you will spend.

sound and fire proof and a job for life.

some people say when you add up: timber, labour, ply and insulation in between as well as sound proof layer - is the same or simialr to concrete price.

i did concrete and it is a serious job.

O ya - and i can run whatever services i like in the void underneath - it was great for my HRV system!!

esox28

+1 for concrete ff

Very little in the cost between timber 9" and the supply and fit slabs.

I used a mixture of 150mm round and flat duct screwed straight to floor slabs, suspended ceiling is at different levels to suit ducting.

Also you have the option to run some plumbing heating services under slab...very handy for piping stove 1" copper line to hotpres.

BryanF

JD6910 wrote: »

O ya - and i can run whatever services i like in the void underneath - it was great for my HRV system!!

i thought space was the issue here?

blacktea wrote: »

Hi all, hope you can help,

I have planning for a house, a 1.5 storey build. Initially I had not considered hrv but now I intend installing it to meet partl 2012 regs. My question is can hrv be fitted between 225mm timber joists between ground first floors which are part of the original design?

Thanks in advance

esox28

What's an extra 300mm between friends on a roof line.

fclauson

a prosecution or a request for retention

iverjohnston

fclauson wrote: »

a prosecution or a request for retention

when they couldn't spot the faults in Priory Hall, they are unlikely to take a height reading of your ridge!