vanleoleo 1 Report post Posted December 5, 2014 Hi,I'm also shopping for water heaters and with all the different types, I'm getting quite confused. From my research, there are 4 different types of heaters1. Point of use (POU) electric heater2. Centralized storage tank electric heater3. Centralized tankless electric heater4. Centralized tankless gas heater (citygas)POU is easy to fix and probably cheap, but you'll need 1 for every water outlet, which can be inconvenient.Centralized storage tank is units are relatively cheap, but takes time to heat up, and incurs high running costs since you're heating up more than you need.Centralized tankless electric heaters have cheaper running costs since you're heating on demand, but the units are apparently more expensive (but how much?), there's a drop in water pressure, and there's a limit in the rate of hot water being pumped out in L/min.Citygas heaters also have cheaper running costs, but we don't get as much freedom in choosing the location of unit and piping.I'm leaning towards tankless heaters (either electric or gas) but I'm not sure of 2 things:1. How much do electric tankless heaters cost?2. How will the piping for citygas heaters be done? Will it be unsightly and costly?Anyone has knowledge and experience of these 2?Thanks!hey don't be confused …. give u a suggestion: call a hotline of a company to ask for advice, i think they will be ok to do so my sister who is doing up her home called ariston http://www.ariston-heater.com.sg/contact/ for help! u can try! Share this post Link to post Share on other sites