Zones for new builds?

[Nvq level 3]

Hi all,

quoting up for some new builds and as far as I was aware you only needed to put zones in if the floor area was 150sqm or above? Is this correct? As I've also been told that with the build being less than 150sqm and having separate living areas etc you have to have 2 zones for this?

Thanks.

 

[newcastle phill]

As far as I know its only based on total floor area of 150 sq m.

No mention of living areas

 

[Matt06]

Are they having Underfloor heating or rads ?

 

[newcastle phill]

Good point. If theres UFH involved that does need to be zoned.

Have a download of the domestic heating compliance guide.
Its all in there......
A right riveting read lol

 

[Nvq level 3]

Just rads being fitted and combis.

 

[Roger Welton]

needs zoning, the 150m2 point differentiates between one or two (or more time bases) so under 15 can have one timer and 2 regular stats, over would need programmable stats or multi channel timers

 

[Nvq level 3]

so are you saying you would have to zone upstairs from down? what's the point of the 150sqm rule? just trying to get my head around it so I don't look silly when they ask why I haven't zoned etc. thanks.

 

[goz666]

Hi all,

quoting up for some new builds and as far as I was aware you only needed to put zones in if the floor area was 150sqm or above? Is this correct? As I've also been told that with the build being less than 150sqm and having separate living areas etc you have to have 2 zones for this?

Thanks.

Discussed this today and the rule changed from over 150sq metres footprint to all zoned four years ago, British Gas refused to do it hence last year the rule was changed back to it's original state, hence anything over 150sq mts needs zoning, anything under doesn't.

Edited to add : Each zone needs Time AND Temperature control.

 

[Roger Welton]

i believe the only change was for replacement boilers, new systems still need zoning.

http://www.planningportal.gov.uk/uploads/br/BR_PDF_PTL_DOMHEAT.pdf

table 2 from the planning portal, section on space heating zones.

 

[newcastle phill]

Nope.
Wrong wrong wrong.

Try downloading an up to date version
Thats 2008 J.C lol
Well Out of date
Latest avail is 2013

 

[Roger Welton]

thats straight off the planning portal website, linky?

 

[Roger Welton]

http://www.planningportal.gov.uk/uploads/br/domestic_building_services_compliance_guide.pdf

found it, odd they've dropped it as a requirement, makes a lot of sense being built in on a new system, less so retrofitted to an existing system.

 

[Nvq level 3]

That to me says you need to zone??? zoning a build of 86sqm seems stupid? But with it being a new installation as its a new build, then from what that is saying zoning is required. nightmare!

 

[Nvq level 3]

So if I'm reading the up to date version correctly no zoning is required?

 

[Roger Welton]

correct

 

[Nvq level 3]

We got there in the end. Thanks all

 

[Roger Welton]

does seem like a step backwards though for new systems, build it in from the start makes a lot of sense imho.

 

[newcastle phill]

Latest version here on my Dropbox

https://www.dropbox.com/s/plfug6kmr51ol1e/domestic_building_services_compliance_guide.pdf?dl=0

 

[ManchesterGas]

If the boiler that you are fitting will modulate down enough to run either zone without cycling then zone away. Personally, I'd rather fit weather compensation and fit locksheilds to both ends of the rads. size all rooms to 21 degrees apart from the barhrooms (23) and over size every rad by 30%.

 

[Nvq level 3]

Vogues are looking at being fitted.

 

[ManchesterGas]

Apparently they will modulate down to a 7th of the max output