Building control drawings

[JohnMo]

14 minutes ago, nwnw said:

Has anyone ever worked out the cost/heat impact of a dMEV running constantly?

Atamate_SDAR+Paper+2019+(1).pdf

[nwnw]

15 hours ago, JohnMo said:

Atamate_SDAR+Paper+2019+(1).pdf 2.47 MB · 46 downloads

Thanks for that.  Had a quick read, but it seemed to me that it wasn't possible to draw any definite conclusions.  Too many variables.

I was thinking more down the lines of a simple calculation...how much volume of 20degC air is removed each year with dMEV vs intermittent vs MHRV and how many kWh does it take to heat that air?

[Mr Punter]

16 hours ago, nwnw said:

Has anyone ever worked out the cost/heat impact of a dMEV running constantly?  I'm not worried about the 0.5W to run.  I'm thinking how many kWh of warm air is being blown out in the winter?  I'm curious to see if single room MHRV would be cheaper in the long run?

 

Maybe base it on extract rate of 10l/s and temperature difference of 10 degrees, year round.

[JohnMo]

some more reading

 

FLY528GB_v2_display.pdf AIVC-2.pdf Construct-Ireland-February-2011-2.pdf

[timhowes]

Very timely thread as we are probably switching our plans away from MVHR and instead towards dMEV.

 

We will most likely want humidity-activated through-wall inlets rather than trickle vents. Does anyone have testimonials regarding the external noise transmission with these, please? Hoping not to be woken up with the birds (acknowledging that there are far worse things by which to be woken!)

[JohnMo]

2 minutes ago, timhowes said:

Very timely thread as we are probably switching our plans away from MVHR and instead towards dMEV.

 

We will most likely want humidity-activated through-wall inlets rather than trickle vents. Does anyone have testimonials regarding the external noise transmission with these, please? Hoping not to be woken up with the birds (acknowledging that there are far worse things by which to be woken!)

You can buy then with acoustic sound deadening as well.

[timhowes]

Thanks. I did search for such but can't find any - can you suggest any examples please?

[JohnMo]

https://www.bpdstore.co.uk/glidevale-fresh-99hdb-humidity-sensitive-acoustic-wall-ventilator/p/232

 

The first one I came across 

[JohnMo]

Some better looking stuff on here

https://www.aereco.co.uk/products/air-inlets-uk/eht2/

[Mr Punter]

4 minutes ago, JohnMo said:

https://www.bpdstore.co.uk/glidevale-fresh-99hdb-humidity-sensitive-acoustic-wall-ventilator/p/232

 

The first one I came across 

 

I think that is the only one available.

[timhowes]

Thanks both, very helpful

[nwnw]

14 hours ago, Mr Punter said:

 

Maybe base it on extract rate of 10l/s and temperature difference of 10 degrees, year round.

Based on this, we would blow 864,000ltr of warm air into the atmosphere every day.  At approx 0.003kWh/1000ltr, that suggests about 2.6kWh/day (946kWh/yr).

Depending on your heating system and tariff, that could be anything from £16 (ASHP & cheap tariff) to £70 (gas boiler) per year.

It would certainly add up and worth taking into account.