murthyveda wrote:nowadays you get instant geysers. They are better than the older ones. In that, it takes less time to heat and since it is (almost) instant, there is as such no limit on capacity.
other advantages:
+ requires less electricity
+ small in size
+ easy to install
+ lot cheaper than conventional ones
I would beg to differ on the advantages of instant geysers over regular ones. I have both in my house. Used instant geysers for 4 years and now have switched for regular one.
1: Instant geysers are rated at 3KW. Regular ones range from 2KW to 3KW.
2. Certainly smaller as there is no storage tank.
3. Installation takes almost the same amount of effort. I can vouch for that since I installed both the geysers myself.
4. Certainly not cheaper.
Advantages of instant geysers:
1. You get moderately hot water almost instantly.
2. Much smaller in size. Hence more portable. Recommended only if your bathroom has lower cielings.
3. Cheaper by almost 50% when compared to 15L storage type geyser.
Advantages of Regular storage type geyser.
1. More energy efficient. Superior insulation material used in order to prevent heat loss for longer durations.
We installed a 15lt geyser with temp control 2 months ago. We switch it on at 5.30am. It goes into auto cut by 5.45am. we switch it off after that. My wife takes bath at 6.30am (super hot water).
I take bath at 9am( still get super hot water). Total run each day 15 mins.
Compare it with instant geyser. My wife used to run it for 10 mins to get 2 buckets of hot water. I used to run it for 5-7 mins to get 1.5 buckets of luke warm water. Total usage per day 15 mins. Still the savings equivalent of 1KW.
Also, one big disadvantage of instant geyser is that since, you need hot water you cannot run the tap at full throttle, else you will not get hot water. Hence, you cannot use showers with instant geysers.
Anyway, whichever geyser you decide to purchase, buy the one that has copper tank. Unless you get cauvery water, the water is going to be quite hard. Stainless tank geysers, do come with a magnesium/zinc anode to prevent them from corrosion, but copper tanks are immune to corrosion. AFAIK, most instant geysers come with copper tanks and among regular geysers also, there are models with copper tanks, but stainless tanks are more prevalent as they are relatively cheaper.
Regards,
Mohit