Conventional (REG)
Used when there is an existing chimney and the heater can be vented to the outside through the chimney.
Power Vented (PV)
Vents to the outside through a wall in the home when there is no chimney. It can be located up to 50 feet from an outside wall. This type of tank requires electricity to operate the blower motor.
Direct Vented (DV)
If located next to an exterior wall, it can be vented horizontally through the outside wall. This unit does not require a blower motor and uses outside air for combustion.
Combination Vented (COMBO)
Uses a domestic water heater to provide efficient space heating and to supply hot water for domestic purposes. Used with Air Handlers for home heating.
Tankless water heater
A small and compact option, this unit heats water on demand without a storage tank and is direct vented outside of a home.
Electric (ELEC)
Uses electricity for water heating, and does not require venting which provides more flexibility for installation locations.