THRS vs. In-stack Economizers

	THRS	In-stack Economizer
Requires Preheated Water To Function*	No	Yes
Remote From Boiler	Yes	No
Uses City Temperature Water	Yes	No
Captures Sensible Heat	Yes	Yes
Captures Latent Heat	Yes	No
Allows Condensation of Flue Gas	Yes	No
Natural Gas Savings	+ 12%	<3%**

*Preheated Water = Energy Consumed, Not Saved.

**Does Not Account for Energy Required To Preheat Water.