Categories BurningHeating 7. Clean exhaust exits the GARN® WHS vertically or horizontally through a flue Post author By David Lunde Post date November 29, 2011 GARN Exhaust Options ← 8. Controller stops blower when combustion is complete – Hot water is now ready to be used in a building → 6. Clean exhaust travels through tubing and transfers heat to water in the tank
