Should I or shouldn't I go for MVHR?

[pulhamdown]

So, is it possible to establish what the ACH @50pa is for my house from the air permeability figure of 1.42 m3(hm2).  I understand that you cannot just apply a conversion ratio to get the answer, but beyond that I'm lost.

 

Colin.

[Jeremy Harris]

10 minutes ago, pulhamdown said:

So, is it possible to establish what the ACH @50pa is for my house from the air permeability figure of 1.42 m3(hm2).  I understand that you cannot just apply a conversion ratio to get the answer, but beyond that I'm lost.

 

Colin.

 

 

If you have the actual air leakage test figure from the air test report, in m³/hr, then you can use that, together with the calculated internal volume of the house, to derive the ACH. 

[pulhamdown]

19 hours ago, JSHarris said:

 

 

If you have the actual air leakage test figure from the air test report, in m³/hr, then you can use that, together with the calculated internal volume of the house, to derive the ACH. 

I'm sure you can.  But how? 

[Jeremy Harris]

Just divide the measured air leakage rate in m³/hr by the volume of the house, in m³, and you should get the ACH figure.

 

For example, our house measured air leakage rate at 50 Pa was 199m³/hr, and the house internal volume is 462m³.  199m³/hr divided by 462m³ = 0.43 Air Changes per Hour (ACH).

Edited May 1, 2017 by JSHarris
typo

[pulhamdown]

Brilliant.  Thanks very much.

 

Colin

Edited May 1, 2017 by pulhamdown
Typo