Would anyone use a AO Smith 40L tank for a 2 room BTO, staying alone? Or is it better off just getting a better electric water heater?
depends on many factors
1) water pressure
2) heater temeperature needed
3) Rain shower ?
4) hot water for clothes ? for fill up pails to clean floors ..
5) hot water to wash dishes ?
If na for above 4-5 points then get the instant heaters will do