Safe to increase boost rate?

[SwissLondoner]

Hello,

 

I live in a new build flat with MVHR (Vent-Axia). The system seems to work well and I have no reason to believe it wasn't commissioned properly.

 

However, I do get more condensation in my bathroom than I would like. The system is set up so that boost mode starts when I turn the bathroom lights on. The current settings are: Normal Extract 20%, Normal Supply 20%, Boost Extract 30%, Boost Supply 37%.

 

So my questions are:

1) Is it safe to increase the Boost Extract % (I know how to do it)?

2) If I do that, do I also need to increase the Boost Supply rate?

 

By the way, I'm not concerned about extra noise or power consumption. Even in boost mode I can't hear the ventilation at all (although it is running).

 

Any insights appreciated – thanks in advance.

[JohnMo]

 

 

Even without boost, you really shouldn't get condensation with MVHR. We rarely have boost on at all, without issue.

 

% speeds don't really mean much, as far as flow rates are concerned. What were the actual flow rates? Should be on the commissioning certificate.

 

Also have you checked your filters?

[Gone West]

17 hours ago, SwissLondoner said:

Any insights appreciated – thanks in advance.

We never used boost on our MVHR and never had condensation anywhere in the house. Assuming it has been commissioned correctly, where is the condensation forming? I would be looking at the air and wall temperatures. What sort of glazing is in that room? Ventilation is going to have to work harder in lower temperatures.