Water vs. Glycol Heater Performance

["R. Cummings" <cumm@flash.net>]

Just to give you an idea of the difference in performance between 50/50
glycol/water and plain water, assume 200 cfm of air at 0f and 3 gpm coolant
at 180f (not a bad assumption going down the road). A typical heater core
with a face area of 52 sq. inches will deliver 32,800 btu/hr with water and
31,600 with 50/50 glycol/water. The discharge temperature of the air would
be 151.5f with water and 146.1f with 50/50.

Bob Cummings 87 Coupe GT