Heat Exchangers

Air Handlers
Air Over Radiators
Baseboard & Fin Radiators
Floor & Kickspace Radiators
Indirect Hydronic Domestic Hot Water Tanks
Plate To Plate Heat Exchangers
Room & Wall Radiators
Shell In Tube Heat Exchangers
Side Arm Heat Exchangers
Unit Heaters - Barns, Garages, Green House & Shops

Heat Exchanger Brochure

Heat exchangers such as air handlers, air over radiators, baseboard fin, indirect DHW tanks,
low mass radiant, room radiators typically are typically designed for 160 to 180 degree supply
fluid with a 20 degree return differential in order to delivery the Btu they are rated for,
if this temperature is lower they will not be able deliver enough heat!

Heat exchangers such as shell in tube and plate exchangers that transfer heat to an indoor
hydronic system will typically require 170 degree (or higher temperatures)
to transfer the heat to the indoor system.

The newest trend in hydronic heating design is to oversize the heat exchanger
(this should be calculated by an experienced hydronic heating professional)
thus allowing for cooler supply temperatures larger temperature differentials
and still delivering the same amount of heat to the building.

The up side of oversizing the heat exchanger is that smaller circulating pumps can be used
consuming less energy. The down side is increased cost of larger heat exchangers.

The intention of oversizing the heat exchanger is to design a hydronic system with a colder
return temperatures which maximizes the performance of the newer conventional
condensing boilers. Care must be taken when using a conventional non-condensing boiler
to not have a return temperature of less then 140 degrees!

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Last modified: 04/18/15