lizzie

@Stu-UK congrats on sorting out your supplier. Have been in a couple of Potton houses, they seemed nice. We gave up on them as suppliers though they were hopeless when we were looking think they must have been busy and couldn't be bothered at the time.

Oh wow @JSHarris I am wondering where I start! I think I need to print this out and have it as a crib sheet with the man on Tuesday. Ive just done a rough check - I have 6 in and 8 out and it seems pretty even. Thank you.

Me again.....I am belatedly trying to educate myself before the man comes on Tuesday and hopefully resets everything. For the sake of my sanity I need to try and understand a bit before he comes. I don't have a commissioning report the space in my book is blank. I have managed to get into the set up system via password now so can see what air flow rates I have. It gives me the rates for each level but I can't find the rates for individual rooms. These flow rates have been set, I presume, with reference to a standard starting measurement e.g building regs. They were set for the default F5 filters but I am using F7 and the handbook says there will be a pressure drop so it needs to be reset for that too. I only changed to F7 after about the first 6 months and have not noticed any difference in air pressure. My current settings and factory defaults in the handbook....see attached.. look quite different so it has been set up for my house not left at default. The attached is the comparison table I have done plus the planning drawing for the system with volumes etc plus the relevant bits from the manuals. The manual talks in volts not flow rates or air changes per hour just to confuse things even more. Can anyone help me make sense of it. mvhr parameter settings.pdf air flow details.xlsx MV36106 - MVHR Layout A2.pdf set up defaults.pdf

@DreadnaughtGo and talk to some really good kitchen designers, go with your plans once approved, its never too early to start....you don't have to buy.....take advantage of their expertise in their field. You may be surprised at how they look at your wish list and how to achieve it.

@PeterStarck no housepants due to bug risk ?

its not working properly I think it may be flow and return and/or pump settings plus I have some bit left over not fitted on manifold...... I wont go on L O L probably got it all wrong as per

Hmm thank you....very clean air then just too dry! I suspect the system has never functioned properly ditto the UFH................I hope the man on Tuesday can live up to my huge expectations and work a miracle. I'm not going down the trial and error bugs and vapour route, it's too scary, consultant is OK with a properly maintained MVHR. I have only one set of lungs and live with the constant worry of bugs getting into my lungs and making themselves at home there.....colonising we call it.....pseudomonas, mac etc they are all around us and most people are not affected by them at all. I have no immune system to fight these things so I cannot afford to take any risks that are avoidable. I cannot afford to get it wrong. Last time it happened I was 3 long hard years clearing it and during that time in and out of hospital on IV antibiotics etc...its not nice and not to be recommended ......and each time there is an episode like that it kills a bit more of my lungs not to mention my will to live. I'm getting too old to fight I need to put up the white flag and live (or die) in peace now.

Thanks @Dreadnaught you are right about my health worries and humidifiers. I bought one of these a few months ago and have used it a bit but the concern over bugs worries me hugely and my consultant has advised me not to use it. The battle between keeping bug free and keeping lungs in half decent working order with reasonable humidity in house is a tricky one and tbh not one I can seem to win unless I take steps to change the air quality in the house on a permanent basis. I hope the enthalpy unit will help. @jack we feel a difference in the air with mvhr turned right down, its not just me but it may be that it is perception. It is still and maybe that makes if feel stagnant somehow. I cant tolerate it for very long. In respect of breathing my body behaves a bit differently to those of you with normal lungs (and I wish I had them!) if you were to try breathing through a straw that is how I am most of the time and sometimes the need for good clean fresh air is overwhelming much like a thirsty man desperately needing a glass of water, its not a conscious thing, at times like this I usually go outside to get air but in bad weather thats not great. I had hoped good air in the house 24/7 would help overcome this. @JSHarris I have a co2 meter. The levels are good there is no problem with the air quality in the house we sit just above or below the 400 so its just the lack of humidity which makes the air too dry. The motivation for building this house was for health not money or energy saving. I spent a long time putting together my wish list for the MVHR...humidity control, anti bacterial pipes etc etc......I wont say who was in charge of getting in the quotes and yes I did question if the system as specced would meet my needs and I was assured it would. If the enthalpy unit does not help then I think I will have to admit failure and go back to old fashioned methods of ventilation to keep humidity at a bearable level. I am keeping everything crossed for Tuesday. Thanks for all your input everyone I really appreciate it.

Thank you, I have the table you sent ready for him.

Thank you

The electricity didnt bill me for the construction use (and standing charges) until we moved in. Gas billed me quarterly from date of connection. Both were with B Gas so no idea why they were treated differently.

Interesting stuff @Ed Davies I have suspected I might be over ventilating so I have had experiments with MVHR set to the lowest rate but after an hour or so the air is not feeling fresh enough so back to normal I go. I dont have a record of the current flow rates they were set by installer and its not written down anywhere. I’ve got the password to get into the system set up now so hope I will be able to see when I log in. I think resetting the flow rates will help but there is no doubt the house is too dry, even the dog is suffering with itchy skin from very dry air. I am hanging all my hopes on the enthalpy unit. I have what feels like a dead spot for fresh air in my hall too. No-one else can pick it up but I think it has a stale air whiff in the mornings. No vents in the hall but its open to the living area and we never shut bedroom doors so should be plenty of airflow through. Who knows what it is.......my extreme sense of smell can be a blessing and a curse. Some years ago I had to re-train my breathing as I had developed hyper ventilation syndrome....seems like I might now have a whole house with the same syndrome lol

@ProDave I am doing well if I am in early 30’s inside when outside rh is 70-80. It can drop down to mid/upper 20’s if it is v hot or cold outside and rh drops. I am hoping for the sort of results @HerbJ is getting when new enthalpy unit is in. We are 2000sq ft single storey and two of us living there plus the pooch. I am there most of the time but OH is at work so mostly only me to contribute to humidity in the house. Thanks @HerbJ understand your boost scenario better now.

Thank you @HerbJ that is great info. Much appreciated. Our unit is in the plant room and easily accessible and I have watched the utube on changing it so hopefully it want take him long....they are being very kind and not charging me the call out fee but just the hourly rate but its a min of an hour at a time so if its an hour and fifteen I have to pay for two hours. My manual tells me that F7 filters affect the pressure and it will need resetting - it was set for F5 in and g4 out originally I think. I’m still using g4 for out. I wish I had some independent control for bathroom boosts I have to boost the whole house to get bathroom boost on. Not ideal. Mine is controlled from my ipad.

I am having my heat exchanger changed to an enthalpy one on Tuesday. I hope it helps as it has been very difficult living in such a dry atmosphere with diy humidifying to try and improve things. I have only ordered the enthalpy unit as with fitting it is coming in at over £1000, the humidistat would be another circa £500 with fitting, so for both of those its almost half as much again as the whole system cost and I cant get the vat back now of course so seeing how I go without stat. Does anyone else have experience of enthalpy and no stat? He is also going to reset the airflow pressures as I am using F7 filters and the book says they need to be reset from defaults for those. I have taken note of Jeremy saying you should hardly feel the airflow (I can certainly feel it) so does anyone know should I be asking him to do to a different setting than building regs one? The man coming to do it is not the orginal installer. I am going to ask him to look UFH to see if he can help me get that sorted although he is only booked for MVHR visit so it may mean a return if he can help....start small dont scare them off hopefully!

I did ....in the end I got a local man in to do it I just couldnt manage it with my hands. He charged me £40....outrageous really as he could walk here he lives that close and it only took 5 minutes. Still better than £80 silicone lot though ?

Me experiment with the roof.....LOL I am still getting used to silicone and the shower screen. But seriously thank you, I think it will only be a problem in certain weather conditions, it has not happened before this last few days and the stormy weather.

We do have an upstand but the wind is so strong at the mo its blowing it right over it just like topping a sea wall. Hopefully weather will calm down soon. Neighbours behind us have tiles off, thats not unusual here on the ridgeway. We put lots of extra strapping on the roof which hopefully will hold it down however wild the wind gets. We had to reduce the size of our overhangs to make it sensible for the engineering on the roof, it sits on top of the house like a hat and too big a 'brim' would have given wind a hand in lifting our hat off.

My roof is flattish - shaped like a lop sided bow different heights at either end and all goes into a central drainage channel so no visible gutters. All carefully calculated and works perfectly in normal circs however the wild weather of the last few days has created an interesting phenomenon. The wind is howling at god knows how many miles an hour we are high on a ridge and very exposed. The winds blow straight across 40 miles or so before hitting us as the first high point. The rain is torrential and the wind is blowing the water sideways off the roof before it can flow down to the hidden drainage channel and away. Its like niagara coming over the edge..... been caught once won't get caught again - soaked through LOL

You could not pay me enough (well it would be an awful lot anyway) to have my build on TV. I had no hesitation in saying no when asked.

yes it can be removed. Light is led tape and has umpteen years lifespan (guaranteed replacement if a problem) so hopefully it will outlast me ?

I gave mine away to get rid of it.

one of the plus points of building single storey ??

@recoveringacademic here you go. Lit and unlit. They are plastered in. Very effective.

I have aluminium channels and diffusers in my wall blades. No other way the lights that are part of the wall can be done.