I'm also thinking of getting the gas water heater. I am concerned about another matter though.
One ID told me that if you hang your clothes near the gas water heater, the burning of fire at the water heater will cause black spots at the clothes. I think he was referring to carbon or something being emitted from the fire and then dirtying the clothes. But I think that's quite unlikely since the fire burns gas directly, which is very polution-free.
Those who are using it, any such problem?