Post and beam

Cool, in my ignorance i assumed a UVC was like a big bucket. in other words not under any pressure.

In the scenario of ASHP and therefore no combi boiler to heat mains pressure water am i going to need a pump to provide decent pressure at the shower head. I wonder what will dribble out of the shower from the UVC which are both on the same floor

Pointless ? mandated though

Where i work we have a resident Peregrine. She seems to favour Pigeons on their way home from a race. They dont know the local area so aren't aware of what lies in wait. Funnily enough the Peregrine does not care whether they are ringer or not. I guess they taste the same.

Use isolation rubber feet to mount the MVHR, this is what i am planning for my loft mounted Brink 400.

Are pigeons regarded as vermin like Corvids? If so then i see no problem with what is advocated here. Non lethal first, tell them to F*** off, shoot them when they dont.

Thanks. 28mm with perhaps a thick insulation layer then rather than a thinner insulated 32mm

What is the detrimental affect of too big a bore pipe, if any ?

8 metres in a direct line so a little more than that to account for the Bends at each end to get up through the block & beam. Thats 8 metres to the manifold under the stairs. 7kW Vaillant

I have seen 32mm pipe pairs in 125mm, 140mm and 160mm so far. For a relatively mild Hertfordshire installation is it necessary to go for the thickest insulation or is this overkill. Dont want to skimp on this element.

High JohnMo Perfect, thanks. Just as i thought really and totally negates the 45 degree UFH flow temp nonsense i have been arguing with what i thought was my chosen installer. Both halves of the system at the same temperature was their mantra.

Dam, i need about 8 but you are a long way from Hertfordshire.

Following on from my other thread about my concerns with a potential installer. How does the ASHP deal with heating the DHW to a suitable temperature? i guess it runs for a short period at 50 ish degrees and then reverts if required to the lower flow rate for the floor. If correct then we need some hours in the day free from UFH heating to do this job. Have i understood it well enough?

Thanks Dave. That makes perfect sense of course. I wonder how that works for the fitting of a 3.1 metre Bi fold?

I have been made aware of this term today in the context of Window & door fitment and the requirements of the scaffolders. 'door to be ladder beamed' I was trying to understand what modifications need to be made to the scaffolding to allow the glazing to be installed. Thanks in advance as always guys

Thank you

What is the source of this chart please? I would like to look at different tog values or at least the relationship it has on sliding the scales

That is seriously impressive

My main concern is the efficiency

I know, i was illustrating the fact that they dont appear to know what they are talking about. This was not their technical guy so i am giving them a chance next week to see if they can say anything to restore their credibility.

During a conversation with these guys this morning, when i questioned the flow temp and pipe centres i was told that 150mm centres might result in too much energy going into the floor resulting in cycling. They dont appear to grasp that that would be true if they stuck to their 45 degree flow temperature but would not be true if the flow temperature was reduced to a suitable value!! If i can find a company that will just install the ASHP/UFH and ignore the grant i think i might do that. Easier said than done though.

I have looked at it again and it is indeed as you say a calculated figure and not a slip of mine on the keyboard. I have to assume its correct. Yes. And yes i am. But i used 1 in case my score is not actually any better when i get that far.

Then that is clearly a mistake i need to check. The wall value is .16

I need to look again at my spreadsheet because the house is 201 sq metres, storey and a half.

I found and have updated with some missing windows i forgot last year. Would anyone that understands the spreadsheet please look at these numbers and give their views. Heat loss - Caxton j DG 5 Sep 24.xls