Passive systems are more common in areas that never experience freezing or where only mild risk of freeze occurs. In colder climates, the Passive system will need to be drained in the fall. The passive system is not freeze proof. The water heating system is pressurized in the springtime and drained in the fall. Residential, as well as commercial customers, who understand this feature, can enjoy substantial energy saving benefits during the summer season.

	Passive Kits - Build your own kit
	Passive Kits - Individual Components
	Passive pre-packaged complete systems