Complete Newbie

[NBW]

Hi 

So we have performed a huge refurb. 

Understably budget has been hit hard and we have scaled the build back. 

 

One area we have overlooked in extractors and someone mentioned if I had looked at MVHR, and I have jumped down a huge rabbit hole. 

 

Getting ventilation downstairs now will be tricky but I will be able to do this for all the bedrooms and ensuite upstairs through the loft. 

 

Is there any value looking at MVHR for just upstairs?

I might be able to gain access to the kitchen downstairs but other rooms might be difficult. 

 

Any good literature to read up on?

 

Thanks

Nick. 

[SteamyTea]

You could look at single room dMVHR.

When it comes to the heat recovery of the ventilation, you really need to know how airtight your property is. The only way to do that is to get it tested.   If it not that air tight, a positive pressure ventilation system may be enough.

 

There are lots of nuances when it comes to ventilation policy i.e. where are the air leaks, what do they leak into, fraction of overall losses...

[JohnMo]

Before you even consider MVHR how airtight have you made the building?

 

The alternative in dMEV. 24/7 running fans in wet rooms with automatic boost only when needed. But to do this you need either trickle vents in dry room (only dry rooms, not wet rooms), these can be in windows or through walls. Ideally these will close or open based on sense humidity. Doors would be under cut to ensure a ventilation flow even with doors shut.

[NBW]

Thanks both
I think as you both mentioned, the first phase is to get someone over ot test how airtight our property is.  
Slightly difficult at the moment as we are without doors.  This might be the first action, an air tightness test

[JohnMo]

Atamate_SDAR+Paper+2019+(1).pdf

 

Some reading for you

[JohnMo]

Cascade mvhr system, plenty of information if you search here

 

https://passipedia.org/planning/building_services/ventilation/cascade_ventilation/start