Fancy MVHR functions?

[puntloos]

25 minutes ago, SteamyTea said:

First thing to do is a room/area by room/area heat load calculation, and the associated airflows, for your local weather regime.

That way, if you do get a professional in, they should realise that you know a bit.

 

Ah but I don't. - but maybe I'll just route all my discussions through the Buildhub forum.

 

"Hey, please initiate the discombobulator spec size gauge, is there enough current maximizer potential in the flux inductor? "

<taptaptap, give me a second here..>

"Steamytea's birthday math calculator says no."

 

25 minutes ago, SteamyTea said:

If you don't do that, you will never know who is talking sense and who isn't.

 

Seriously though, I think I'd like to know more but the whole point of getting a pro is that you pay them to bring specialism to a job that I don't have, no?

 

Naturally, I'd need to find a good heatingcoolingperson.. 

[Dan F]

On 03/09/2019 at 09:34, jack said:

 

We have a drying cupboard (or will do when I get around to finishing it) in our utility room. It has an MVHR extract above it, and the door will be ventilated at the bottom to allow airflow.

 

It's also beside the plant room. I've left provision for a fan to blow warm air from the plant room into the bottom of the airing cupboard, but to be honest, I doubt I'll bother using it given how effective unheated air is at drying things. 

 

How well did this work in practice, did you end up blowing air in from the plant room?

 

We have a drying cupboard that backs onto the plant room with a MVHR extract above.  In fact, the 300L UVC, which is about to be installled in the plant room, is right behind the drying cupboard.

 

What I'm trying to work out is how much of this rear wall to replace with slats/grille:

- If I just put a largish grille at the top then it will probably draw fairly warm air through the grille but not much of it will go past the clothes, which doesn't seem like a good idea.

- If I just put a largish grille at the bottom then there is a chance that the primary ariflow will be from under the plant room door -> grille without picking up that much heat from UVC.

- Alternatively, I could try to open up as much of the wall as possible replacing with wooden slata of some sort for aesthetics.  This would make it a lot more like a traditional airing cupboard.

[jack]

10 hours ago, Dan F said:

How well did this work in practice, did you end up blowing air in from the plant room?

 

No. In the end we decided to use that cupboard for something else. Anything that needs drying is just hung up in the shower next to the cupboard.

 

11 hours ago, Dan F said:

- If I just put a largish grille at the bottom then there is a chance that the primary ariflow will be from under the plant room door -> grille without picking up that much heat from UVC.

 

The way I visualise it, air being pulled in through the narrow slot under a door will tend to swirl upwards and mix as it enters the plant room.  

 

We left a pair of studs without noggins in the shared wall between the cupboard and the plant room. I'd been thinking about having a low power extraction fan high up in the plant room, which would push warm air down between the studs into a grill low down in the cupboard. In practice, the plant room is uniformly warm. It has all the UFH pipes passing under it, and our UVC, so it's very warm in winter, even at floor level. If I were to use the cupboard in the way I'd planned, I'd just put a low-level grill and leave it at that.