Re: Winter refrigeration !
Very seldom, do we see recirculated air for low ambient control/operation. For refrigeration or A/C we offer several methods and combonations.
We have 20 dF fan cycling, 0 dF fan cycling, condenser flood back, variable speed fans and heated and insulated receivers. Depending on the equipment, the application and where the equipment is headed, we determine the best method of head pressure control.
For evaporative condenser units,we have another set of design criteria to use and combine with the above designs.
Ken