有時房子沒有地方裝hot water tank,或 hot water travels too far, example: from basement to 3rd floor,可以考慮 tanless water heater:
優點:省水,省氣。我沒用過電的,聽説要考慮馬力是否夠,這裏不敢多言。
缺點/事先功課:聯係gas company,make sure gas supply line BTU can support your hot water heater。need to run a 2" gas pipe (can use the yellow flex kind) to the new tankless water heater.
我六年前裝一個,no maintenance,no issue。Hot water come out immiditely。聽説國內很多家裏都用這個。