QUOTE(whitesmith @ Jan 17 2021, 09:10 PM)
Hello, Im staying at Terrace which doing reno now.
I'm going to install a centralise pump near to my tanky , so that it boost up my whole house water pressure, so question arise, in this case
1. do i need to buy water heater with DC pump? would this increase my water pressure / may potentially decrease the water pressure ( if let say the water input pressure from pump is higher than the water heater could produce )
2. Does anyone had a good rain shower to suggest? Currently, I'm looking for alpha reno-i / bosch tronic 8000s , any user review ? please share... ( bosch is quite new, i'm not sure how good is the pressure output, and my family like hot and high pressure shower )
1. if the pump is after the tangki (i.e. PUMP INPUT = tangki, PUMP OUTPUT = WH or whole house all) then its already pressurised so no point getting WH with pump. waste money and or may damage the WH built in pump.
2. WH rain shower if you want hotel feel then centralised storage heater + water pump is the best.
Normal 3kW class instant WH is only good enough for its own default shower head.
2.1 There are 4.8kW class WH (hitachi, panasonic for-highlands model) which provide more heat output which will be needed as the water (once with water pump) will have less exposure time to be heated due to fast moving water volume.
2.2 For 4.8kW class WH u need to upgrade wiring to DB box as standard wiring CANNOT handle their running amps (21A load).
Standard 2.5mm cable is rated for up to 21A max load so not recommended to push it redline.
Minimum 4mm (max load 4mm), better 6mm (for long cable runs between WH and DB due to voltage drop consideration) - use mega kabel/caramay cable.
This post has been edited by ceo684: Jan 17 2021, 09:16 PM