Instant water heater is called instantaneous system as it heats up cold water instantly to warm water after passing through the heating element without waiting time.
Difference between Storage Water Heater & Instant Water Heater

Instant Water Heater
1 Standing Shower
1 Power Point
Cold Water Pipe

Storage Water Heater System
Storage Water Heater System are the type for multipoint solutions which operates with mixer tap system and can supply to more than 1 shower point such as bathtub, jacuzzi, rain shower, sink or basin or washing machine.
Multipoint System
1 Power Point
Hot & Cold Pipes
Here are few tips to consider before buying a instant water heater:
1. Check the water pressure by checking distance from water tank or source from main.
Water Pressure System
from Mains or Ground Floor:

If your water pressure is from the mains, typically it will be higher hence eliminates the need for the centralised domestic water pump.
Water Pressure System
from Mains or Ground Floor:

If water pressure is from the water tank and your home is 2-3 storeys high, generally you will need a water pump.
Water Pressure for Apartment / Condominiums:

2. Check sufficient water pressure.

Comfortable Water Pressure
More than 1 Bar or 14.35psi of water pressure

Booster Pump Water Pressure
4x booster power from normal water pressure.
Option 1: Instant Water Heater with Pump for 1 Shower Point
Inverter Booster
Pump

50% Energy Saving
Low Noise Operations less than 35dB
Durable

SB Series, SL Series, SC Series
Turbo Booster
Pump

30% Energy Saving
Low Noise Operations less than 65dB
Durable

SB Series, SL Series, SC Series
AC Double Ball Bearing
Booster Pump

-
Low Noise Operations less than 80dB
Durable

800 Series & 838 Series
Option 2: Centralised Domestic Water Pump for Multi Shower Point boosts water pressure for entire house
JHP Series Water Pump
Powerful Water Booster
Noise Reduction Technology
Multistage Centrifugal Pump

JHP Series

*If a centralised Booster Pump is installed for house, then you Instant Water Heater does not need a booster pump.
3. Choose your accessories

With Rain Shower
8'' rain shower bar set
5 spray option
With diverter valve
(switches between normal & rain shower)
3.8'' shower head

Without Rain Shower
Chrome Slider Bar Set
3 or 5 spray options
Without
diverter valve
3.8'' shower head
4. Choose your colour

White
Original White Plastic
Long Lasting
Non-UV resistant

2K Spray
Double Layer Spray Paint Finishing
Long Lasting
Protects from sun UV rays
5. Check your installation point
Plug Point & Wiring Connection: 15 Amp. for 3.6kW
Recommend concealed wiring behind the water heater outlet.

Piping: 1/2 BSP Standard Piping
Connect to inlet of water heater height more than 4ft from the ground.
Inlet always on the right and outlet on the left.

Sample Guideline for Instant Water Heater Installation
