Whether or not you can install a tankless water heater in your attic depends on your attic.
Water heater in attic safe.
Leaks from a water heater can be major depending on where the leak is coming from damage can be to attic flooring insulation drywall and even flooring if it leaks a long time a 50 gallon water heater will overflow the pan and then some if it bursts or the bottom rusts out mold can form from the moisture in your attic.
No it is unsafe to have your water heater in your attic since it can break leak and cause water damage before someone notices.
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Moving it downstairs to a first floor interior closet or garage is the safest option.
Truth be told the attic may be the best place to hide your tankless water heater.
It s almost always safe to place the tankless water heater in the attic.
When installing the water heater in the attic you no longer need to worry about the aesthetics they don t look beautiful.
Simply put as long as there is enough combustion air provided tankless water heaters can be installed in any area of your home from a utility room to a garage to yes even an old dusty attic.
Your attic can easily reach temperatures of 120 140 degrees which is optimum for keeping the water in your tank sufficiently hot without using any energy.