Forum Replies Created
We seal them and also make sure traps have water in.
Catching up on forum posts as have been too busy.
Re boards I always regret having set up the forum with so many boards but if there is a demand then I am sure another board can be created (I no longer do this). Problem is there is always overlap – eg with software and simulation?
Re OEM I think it is excellent and they are great people but I ran out of time playing with it before I was fully up to speed with what is a developing system. On my long list of things to get back into when I am at a loose end!
Oh dear, might be time to switch electricity supply companies!
It's a lovely home you have built Tahir and it is interesting to spot so many forum discussions turned into concrete results!
In terms of measuring floor temperature, this is what it might look like under long wave IR. Area average temp 17.7C.
PHPP can't change the Ug with roof angle But it does flag up a warning to check the Ug if the glazing is not vertical.
For standard triple glazing that would be 0.6 U vertical I use about 0.9 in sloped position. As David says you need to consider whether any downdraft of cold radiant will cause comfort problems but modest sized skylights should be fine I think.
Agree with Alan. If the floor feels warm then it is what I'd call hot! Your floor won't be much above room temp when on so will feel cool to touch. The medium price IR thermometers from Maplin are fine. Resolution good, 0.2C or so and you can 'calibrate' against a surface at room temp.
Can also check kids for fever at a distance if you suspect they have something you might catch!
Worth pointing out that the benefit of mass is modest and that it doesn't 'slow down' the escape of heat as some claim!!
No, I use Therm, in XP in Parallels on Mac.
No problem taking screenshots from Mac side and pasting results into XLS.
Some good resources on Warm's web site and the training is very good.
The main target is the space heating of 15kWh/(m2.a) (or 10W/m2 peak heat demand).
This is calculated according to PHPP with Passivhaus assumptions for gains etc.
Please see the document claiming the Passivhaus Standard which can be downloaded from the Passivhaus Trust Website.
There are no prescribed elemental U values except for windows (climate specific) and that is for comfort. However you will need very good U values (0.15 or better in the UK is typical) to meet the target for most building types, especially dwellings.
The 120kWh/m2 if total primary energy value.
Same for Carbonlite, I can't help with CSH.
I have emailed you a brochure on vents designed for MEV but have not used them. FrischLuftKomfort might show up in Google.
Unless Alan or others disagree, I'd be with Mark on pulling the air thru' the fabric, need a few Pa resistance so that wind and stack don't dominate.
The engineer will specify this to suit.
Had the same objections plus aesthetics from a very switched on client some years ago so ended up designing some fittings for the job with a friend, Colin Chetwood, who makes lights. The friend had also been biased against CFLs and linear fluorescents but has now embraced them!
I like T5s (obviously high frequency ballasts) and you can get warm or cool white as well as dim-able. Simple pelmet fittings can be good for ambience but if you need good work lighting then likely to be suspended with mix of down and up light, great for craft work without shadows.
Did exactly what you describe over 10 years ago based on pencil and paper calcs by structural engineer Alan Pearce in Leominster. Bob Johnston (structural engineer) http://m.bjse.co.uk/ has designed a few of these now as have others. Shouldn't be a problem for any structural engineer.22 May 2012 at 6:00 am in reply to: Wall breathability – differences between external and internal surfaces #38453
5 is the figure in my head but it's a bit academic given all the other variables that ae also important such as eliminating air leakage, driving rain etc.