Pocster

I read it was best to avoid the roof due to the associated cost and hassle ( I can’t do heights ) ! Is there a maximum length the air intake/out can be ? Or is it simply as short as possible???

Mvhr is the dog now . Assume you want the air in/out pipework as short as possible . But if tanks in the middle wherever I mount the mvhr will be a fair distance from a suitable external wall .

Access still seems a pig was hoping for one loft hatch to access header tank and mvhr ! . But don’t think that will be possible especially as I wanted neither above a bedroom which leaves just the bathroom and hallway . As I can see header tank must be central of trusses . Mvhr erm .....

But anyway that seems simple enough to do .... thanks ! ?

Ah I see ! . Does this apply even if my truss though is supported at its centre point by a stud wall ? . Can understand if the total truss span is unsupported. When I get back will stick a photo up of the central section .

Ouch ! ?

Sorry when I say ‘water tank’ I of course mean header tank . Googling seems to suggest it doesn’t require any particularly special platform .

Because you either install it now or never ! I know there’s a big debate over the ROI with these . But I think it should be compulsory on new builds . Also you are ‘helping the environment ‘ a bit ...

What do you mean by ‘standard details ‘ ? . It’s not in the plans as it’s a header tank supplied with rainwater harvesting system ( once I purchase it ).

Yes I was thinking ( not clear in that photo ) that the centre of the trusses all sit on a partition wall ; so that would be a good place to mount mvhr and water tank - but access will be a dog !

Not sure if I need to add extra timber for strength . Say 4x2 going 90 degrees across the trusses ; necessary ???

Although away I am still thinking about this .... So T&G chipboard is ok sat on those trusses ? . I’m allowing for just my weight and mvhr unit . Will deal with header tank later . As I will have to cut each board around each rafter ( ?! ) I assume I screw noggins into the trusses to support the chipboard where it’s joint isn’t supported by a truss . See it’s not all fun in the sun!

Sunken bath surely !

Prison then executed for certain . Farewell

Oh yes ! PIR nice to Nick !

Water company forced me to install one outside because we are having rain water harvesting again as said to avoid contamination into the mains

Git

Guys ! Remember if you are struggling to get enough depth in PIR there is always vacuum insulation - but at a high cost of course ! . Just a thought

150 ? Oh ! I thought they’d be the same as the ducting I.e 75mm Wall then - going to be tricky getting them in a TF and ( as my trusses are high ) in the wall section ?

More thoughts ... The in/out air pipes . I want to mount them on the external wall as roof would be a pita . Is it not unreasonable to cut out a slot in the insulation between the rafters and run the pipe either down into the cavity wall or to the eaves ? ( assuming it will fit )

Because sometimes you DO notice something which may justify the price difference . Between just about any MVHR system costing 600 quid and another twice the cost it’s hard to tell . That’s why I did the post ; too see if anyone jumped in with a valid reason to choose one over the other .

Yeah I know - it’s hard to see the difference in spec for the price .....

Looking at

Ok , so a platform attached to the rafters , is that what you mean ? So no load on the chipboard t&g ???

Lol insulation was a mission ! Not 1 truss the same distance apart . Which actually brings me to my next question how do I board with these trusses getting in the way ? - going to be a pig ?