Quote Originally Posted by taz24 View Post
Thats where I'm comming from.
This is not a real application just a hypothetical one and I want to prove or disprove that lowering the head pressure is more cost effective than installing and using heat reclaim .
But I would like some figures so I can demonstrate my case.

Cheers taz.
Roger that. Now take a 365 days/year, 24 hours/day, 30 ambient temperature sample/hour datasheet.
Evaluate a thermal exchange coefficient, as an average of all the walls and roof of the supermarket. You will come up with something like 0.1 W m^2 / K.
Compare this against desired room temperature, ambient temperature and supermarket surface in the datasheet and calculate the actual instant heat need. Detract the heat load of lightings, display condensers and "cow stable" effect of breathing people.

That's it.