doofus

Hi there, Can you give me a quote based on this: 1. New 5-room BTO, using rain shower for both MBR bath and common bath only. 2. 2 - 3 adults. Peak usage - mornings 7 am - 7.20 am and night 9 pm both baths will have concurrent usage. I suppose a 30-40 L should suffice? 3. Ideally prefer digital water heater 4. Can you help advise where is best location to place the storage heater. Ideally in service yard but understand there is space limitation due to clothes hanger on top. Thanks in advance!