Helpful Sub Floor Ventilation Packages Everlasting Set Up (10+ Years) Plenum air temperature rise is brought on by cool supply air coming into contact with hotter than air concrete slab and raised floor. The same examine found that air temperature rise in summer season is higher than in winter http://lorenzowpibu.dgbloggers.com/1276954/a-comprehensive-examination-for-fast-plans-for-sydney-subfloor-ventilation