⚡ Quick Answer (Start Here)
Before installing your water heater, you must decide:
📍 Where to install
⚡ What power supply is allowed
🚿 What type of system (instant vs storage)
👨🔧 Whether you need a licensed plumber / electrician
👉 Getting this wrong can cause:
poor performance
safety risks
costly rework
📍 Step 1: Where Should You Install the Heater?
For Instant Heaters:
Installed inside bathroom
Near shower area
Direct connection to shower head
👉 Best for:
single bathroom use
compact spaces
For Storage Heaters:
Installed:
above ceiling
high wall position
service yard / concealed area
👉 Best for:
multiple users
rain shower setups
⚠️ Important Placement Rules
Must be accessible for servicing
Avoid direct water splashing on electrical parts
Avoid exposure to rain on any part of the water heater
Ensure proper wall support (for storage tanks)
👉 Your licensed plumber will advise the correct location
⚡ Step 2: What Power is Allowed?
For JOVEN Instant Heater Power (Singapore Typical)
Power | Usage |
3.0 - 3.3 kW | Basic heating |
For JOVEN Storage Heater Power (Singapore)
Power | Usage |
3.0 kW | Basic heating |
Check Before Installation:
What is your maximum allowed current for your unit
Is there a dedicated circuit?
Is wiring suitable for the heater power?
Is there an isolator switch installed?
👉 If unsure → consult a Licensed Electrical Worker (LEW)
Recommendations by Housing Development Board (HDB):
For flats provided with 30amps main switch:
Consumption of individual appliance should not exceed 3kw for instantaneous water heater, washing machine with heater, electric oven, oven, and cooker unit
Consumption of appliance should not exceed 1.5kw for storage water heater
No restriction on the number of appliances installed but subject to the limitation of existing main switch rating
For flats provided with 40amps main switch and flats upgraded under MUP/ HIP:
No restriction on the number of appliances installed but subject to the limitation of existing main switch rating and the rating of appliances not exceeding 15amps power point
🚿 Step 3: What Shower Setup Are You Using?
🚨 Very Important (Most Common Mistake)
Your shower type must match your heater
Instant Heater:
❌ Not suitable for large rain showers (Use the provided JOVEN shower head for any of the Instant Heater models purchased)
✔ Best with handheld / low-flow shower head
Storage Heater:
✔ Suitable for rain showers
✔ Better for multiple users
👉 Wrong combination =
❌ water not hot enough
❌ unstable temperature
🔄 Step 4: Single Point or Multipoint System?
Single Point (Most Common)
One heater → one shower
Multipoint System
One heater → multiple outlets → JOVEN Storage Water Heater
(e.g. shower + basin)
🚨 Critical Warning
👉 Do NOT install:
❌ Open outlet instant heater → multipoint system
This can cause:
pressure issues
heater damage
safety risks
👨🔧 Step 5: Do You Need a Licensed Plumber / Electrician?
🇸🇬 Singapore Regulation
According to Public Utilities Board (PUB):
All water heaters must be installed by a licensed plumber
Installation must comply with water regulations
Improper installation may result in:
safety hazards
system failure
non-compliance issues
⚠️ Why This Matters
A licensed plumber ensures:
Correct piping connections
Proper pressure control
Safe system configuration
Compliance with regulations
🧠 Simple Decision Guide
Situation | Recommended Setup |
Small bathroom | Instant heater |
Rain shower | Storage heater/ Instant Heater (Selected Models) |
Multiple users | Storage heater |
Strong pressure system | Storage Heater with Pressure Reducing Valve installed(PRDV) |
💡 JOVEN Recommendation
JOVEN heaters are designed for:
✅ Safe installation
✅ Efficient heating
✅ Long-term durability
👉 But correct system planning is critical
📅 Before You Install – Checklist
✔ Confirm heater type (instant / storage)
✔ Confirm installation location
✔ Confirm electrical capacity
✔ Confirm shower type
✔ Engage licensed plumber
❓ Frequently Asked Questions
Can I install the heater myself?
👉 ❌ No — must be installed by a licensed plumber (Singapore regulation)
Can electrician install heater?
👉 Electrician handles wiring, but plumber must install water system
What happens if installed wrongly?
👉 Poor performance, safety risk, and possible non-compliance