HERMETIC GAS WATER HEATERS Hermetic water heaters take necessary oxygen for combustion through fan inside it from outside of the pipe which is interlock position. When combustion occurs, hermetic water heaters discharge exhaust to outside from interior part pipe. In connection with this situation, hermetic water heaters do not use oxygen of the place that are placed and do not make exhaust to the palace that are placed. Hermetic Water Heater Operation Principles. Hermetic Water Heaters which are automatically shut off in case of pipe blocking have kinds of safety accessories such as over temperature safety, flame out. Hermetic Water Heaters which heat water passing inside, automatically operate when tap or faucet are opened. Desired water temperature is provided by setting LCD panel on the water heater. In case of increase or decrease happens at the water volume, hermetic water heaters can set the temperature automatically. “Daxom” presents unproblematic installation possibility for confined spaces with its Turkey’s thinnest hermetic water heater (11cm) Daxom Plus model.