Sizing MVHR

[sonicboom]

My property has a floor area of 100m2, and volume of approx 480m3. I have a PIV and before the air tightening noticed  about 35l/s is more than enough for the property. The question I would like to ask is, how do I select the proper size unit. I was thinking of going for a Brink Flair 450 but not sure if that'll be enough.

[JohnMo]

1 minute ago, sonicboom said:

My property has a floor area of 100m2, and volume of approx 480m3. I have a PIV and before the air tightening noticed  about 35l/s is more than enough for the property. The question I would like to ask is, how do I select the proper size unit. I was thinking of going for a Brink Flair 450 but not sure if that'll be enough.

4.8m tall rooms, is that correct?

 

How airtight is your house?

[sonicboom]

5 minutes ago, JohnMo said:

4.8m tall rooms, is that correct?

 

How airtight is your house?

^{Sorry, 2 floors, each 2.4m.}

[SteamyTea]

10 minutes ago, sonicboom said:

volume of approx 480m3. I have a PIV and before the air tightening noticed  about 35l/s is more than enough for the property

That is about 0.25 ACH.

As @JohnMo says, how leaky is the rest of the building.

[sonicboom]

Sorry, missed @JohnMo airtightness question - long day.

Its extremely air tight, to the point the PIV is not really working any more.

[Nickfromwales]

3 hours ago, sonicboom said:

Sorry, missed @JohnMo airtightness question - long day.

Its extremely air tight, to the point the PIV is not really working any more.

Respectfully, you need to do a test and get the results. If it’s worse than you think then maybe a 450 won’t do it, if it’s much better (sub 1.0 ACH) then the 450 may suffice. 

 

That said I’d still go for a 600 if you’re not counting every penny    

[Iceverge]

How many people in the house?

 

BALLPARK numbers here.....

 

30m³ per person per hr, normal flow rate for an MVHR unit is about 30%

 

So if a Brink 450 is I assume 450m³/hr in a nominal setup then it'll do 4.5 people. 

 

If you have 6 people get a Brink 600 (if even such a thing exists). 

 

 

 

 

 

[Eric]

12 minutes ago, Iceverge said:

 

If you have 6 people get a Brink 600 (if even such a thing exists). 

 

It does exist , I have one