[Equest-users] ERV

Patrick J. O'Leary, Jr. poleary1969 at gmail.com
Mon Apr 23 04:50:09 PDT 2012

depends on how you control the erv.  an uncontrolled erv (i.e. erv fans 
on all the time when unit supply fan is on) will probably use more fan 
energy than is saved in cooling or heating energy.  at a minimum setting 
the erv fans to operate based on a delta t w/the outdoor air is required 
to demonstrate erv energy savings.  or delta enthalpy depending on your 
wheel type.

if you look at the march issue of ashrae journal it has an article on 
how to control a total enthalpy wheel and save money - and it makes the 
point of having the fans (supply/exhaust) and wheel run all the time 
can/will add energy cost to your building.

On 4/22/12 9:25 PM, sambhav tiwari wrote:
> Hi All,
>            Whether the Energy recovery wheel should only reduce the
> cooling kwh or fan kwh also along with cooling kwh . as far as cooling
> energy is concern it is sure it will come down but i am not sure about
> fan energy effect by ERV.
> Thanks
> Sambhav
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