Here are the general requirements for high capacity gas tankless water heater installation hot on the height of the burner chamber above the floor. According to the model / type / age of your water heater and your skills, they may or may not apply - always check before installation.
If there is no manual explaining the requirements for installing your unit, contact the manufacturer and ask for installation instructions for your particular model (in most cases you will be able to get online ).
However, the rules listed below are extremely important. If they apply to your device, you can put your life in danger by not following them.
As a general obligation, you should not install a water heater in a place where gasoline, vapors or liquids, flammable and combustible materials may be present. Such a facility could cause an explosion or fire, but sometimes there can be no other choice. If that's where you're standing right now, you must follow the rules.
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