Geyser suggestion required

My home water gas geyser burst, can anyone pls guide me how much it cost to buy new one? and which one is better for small apartment ?

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If you have salty water in your lines go for unigas (its main dealer is opposite metropole hotel Karachi)
If you have sweet water in your line just go for singer.
Get the thermostate checked of the old geyser if it’s working fine you will save 3-5k on it

What type of geyser were you using before? Instant or the normal big geyser?