Best Water Heater Installation in Singapore: Ultimate Guide for Homes & Businesses
- sgelectricalplumbe
- Aug 21
- 8 min read
Updated: Aug 27
Water heaters are crucial for every home or business in Singapore, where a hot water supply is essential for daily living. Whether you aim to install a new system or replace an old one, knowing the various types, features, and maintenance tips can save you both time and money. This comprehensive guide arms you with everything you need to make a well-informed decision about water heaters.
1. Types of Water Heaters - Best Water Heater Installation in Singapore
When it comes to water heaters, there are primarily two types: instant water heaters and storage water heaters.
Instant Water Heaters
Instant water heaters, also called tankless water heaters, heat water on demand. This means you can enjoy hot water immediately without waiting. They are compact and energy-efficient, making them ideal for smaller spaces like apartments or individual bathrooms. For example, a typical instant water heater can save up to 30% on energy costs compared to traditional storage heaters.
Pros:
Energy-efficient—no standby heat loss
Unlimited hot water supply
Longer lifespan than tank models
Cons:
Higher upfront cost
May require electrical or gas upgrades
Best Water Heater Installation in Singapore
Storage Water Heaters
These are the most common water heaters. They store hot water in a tank, which is kept heated and ready for use. Storage water heaters come with a tank that holds a set amount of hot water. They are particularly suited for larger households or businesses where multiple outlets may need hot water at the same time. For instance, a family of four might benefit from a 150-litre storage heater, ensuring that everyone has access to hot water whenever necessary.
Both types offer distinct advantages, so narrow down based on your specific needs.
Pros:
Affordable upfront cost
Simple to install and repair
Cons:
Higher energy bills due to standby heat loss
Limited supply of hot water (once the tank is empty, you wait)
Best Water Heater Installation in Singapore
Gas Water Heaters
Here’s an image showcasing a typical gas water heater installation in Singapore—usually mounted in well-ventilated areas like service yards or kitchens. It’s a sleek, space-saving alternative to bulky electric units.
Why Choose a Gas Water Heater
Cost-efficient to run: Gas-fired heaters typically result in lower monthly bills compared to electric models, thanks to the cheaper energy cost of gas. This makes them a long-term economical option.
Compact and discreet: They’re often installed outside the bathroom—making bathrooms cleaner and more minimalist in appearance.
Continuous supply: Unlike storage heaters, gas instant heaters can provide nearly unlimited hot water, ideal for families with heavy usage.
Installation Requirements & Regulations
Designated installation zones: In HDB flats, gas heaters must be installed in the kitchen or service yard; in condos, they’re typically placed on air-con ledges.
Compliance is mandatory:
Must meet PUB SS636:2018 (for plumbing) and EMA SS638:2018 (for electrical work) standards.
Specific gas heater installations also require adherence to SS608:2015+A3:2023 plus regulations from EMA and gas authorities.
Certification required: Installations must be performed by a PUB-licensed plumber and/or EMA-licensed gas service worker, including post-install safety checks and documentation. Non-compliance carries fines up to SGD 5,000.
Cost Estimates
Installation Costs:
Typical water heater installation (electric or storage): SGD 300–800
Gas water heater installation: SGD 500–1,000 (may vary depending on complexity and piping needs)
2. Factors to Consider When Choosing a Water Heater
Selecting the right water heater requires evaluating several factors:
Size and Capacity
The size of the water heater should meet the hot water demands of your household or business. For instance, a family of four may need a heater with a capacity of at least 150 liters, while a single person could opt for a smaller 30-liter instant heater.
Energy Efficiency
Choose energy-efficient models to lower your monthly utility bills. Water heaters with higher Energy Factor (EF) ratings can reduce energy consumption by up to 50%. Aim for heaters that are ENERGY STAR certified, which signifies better efficiency.
Installation Space
Evaluate the space available for installation. Instant water heaters require significantly less installation area compared to storage heaters, making them ideal for limited spaces.
Budget
Set a realistic budget for your investment. Although it might be tempting to opt for cheaper options, investing in a high-quality water heater can lead to savings in energy bills and repairs. On average, a high-efficiency unit may cost around 30% more upfront but can save you hundreds in operational costs over time.
3. Signs You Need a New Water Heater
Knowing when to replace your water heater can prevent unexpected cold showers. Look out for these key signs:
Age of the Unit
Most water heaters have a lifespan of 8 to 12 years. If yours is older than this, consider a replacement to avoid sudden breakdowns.
Inconsistent Water Temperature
Fluctuations in water temperature are often a sign that the heating element is failing, indicating it might be time for a new unit.
Strange Noises
Sounds like banging or popping from your water heater suggest sediment build-up, which can lead to inefficiency and premature failure.
Leaks
Any signs of water pooling around your water heater indicate a possible malfunction that requires immediate attention.
4. Water Heater Installation Process
Installing a water heater involves several steps, which can help you understand the process better:
Step 1: Choose the Right Location
Pick a location that allows easy access for future maintenance. Make sure the spot complies with local building regulations to avoid any issues later.
Step 2: Prepare the Area
Clear the installation area of any obstructions. Ensure proper ventilation if your heater requires it.
Step 3: Disconnect the Old Unit
For replacements, safely disconnect the old water heater from its power supply and plumbing lines.
Step 4: Install the New Unit
Install according to the manufacturer's guidelines. If you feel uncertain, hiring a certified professional is recommended for optimal safety and performance.
Step 5: Test the System
After installation, test the system for proper functionality. Check for leaks and verify that the water heats adequately.
5. Water Heater Maintenance Tips
Regular maintenance extends the life of your water heater and boosts efficiency. Here are valuable tips:
Flush the Tank
For storage water heaters, flushing the tank annually can eliminate sediment buildup, enhancing efficiency and prolonging the unit’s lifespan.
Inspect for Leaks
Regularly check your water heater for any signs of leaks or damage to ensure ongoing safety and efficiency.
Schedule Professional Maintenance
Consider having a professional service your water heater every few years. An expert can perform a more thorough assessment of your unit.
6. Water Heater Repair
If your water heater isn't performing well, repairs might be necessary. Common issues include:
Heating Element Failure
If you're not getting hot water, the heating element is the first thing to check. Replacing a faulty element is often the solution.
Thermostat Issues
Inconsistent water temperatures could be due to a malfunctioning thermostat, which can be easily replaced.
Sediment Buildup
Excess sediment can hinder performance. Regular flushing helps prevent this, but if issues occur, it’s time to call a technician.
Consult a professional if you are unsure about the problem, as they can accurately diagnose and fix the issue.
🇸🇬 Water Heater FAQ – Best Water Heater Installation in Singapore
Q1: What type of water heater is most common in Singapore homes?
A: In Singapore, instant (tankless) water heaters and storage water heaters are both widely used. Instant heaters are popular in HDBs and condos due to their compact size and energy efficiency, while storage heaters are more common in landed properties or bathrooms with higher water usage.
Q2: Do I need a PUB license to install a water heater in Singapore?
A: Yes. In Singapore, water heater installation must be carried out by a licensed plumber registered with PUB (Public Utilities Board) or a licensed electrical worker (LEW), depending on the type of heater. DIY installations are not allowed as they may breach safety regulations.
Q3: What is the average cost of installing a water heater in Singapore?
A: The average cost ranges from SGD $150 to $300 for instant water heaters and SGD $300 to $500+ for storage water heaters (excluding the unit itself). Costs may vary based on complexity, heater brand, and bathroom layout.
Q4: Can I switch from an instant water heater to a storage heater in Singapore?
A: Yes, it’s possible, but it requires professional assessment. Storage heaters are bulkier and need sufficient wall support and space. Electrical load capacity also needs to be checked to ensure compliance with HDB or condo regulations.
Q5: How long does a water heater last in Singapore's climate?
A: On average, a water heater lasts 8–12 years in Singapore. Humidity and frequent usage can affect lifespan. Regular servicing and descaling help prolong its efficiency.
Q6: What are the best water heater brands available in Singapore?
A: Popular and trusted water heater brands in Singapore include Ariston, Joven, Rheem and 707. Your choice should depend on bathroom size, usage needs, and preferred warranty coverage.
💡Comparison
✅ 1. Instant Water Heater
Feature | Description |
How it works | Heats water on demand as it flows through the unit |
Best for | HDB flats, small condos, single-bathroom units |
Water Pressure | Lower; depends on existing plumbing |
Energy Efficiency | High – no standby heating loss |
Installation Location | Inside bathroom (compact) |
Price (unit + install) | ~$150–$300 for unit, $100–$200 install |
Popular Brands | Joven, Rubine, 707, Ariston |
Pros | Space-saving, low cost, energy efficient |
Cons | Water flow may drop with multiple outlets, can't support rain shower without booster pump |
✅ 2. Storage Water Heater
Feature | Description |
How it works | Stores and heats water in a tank (typically 15–30L) |
Best for | Larger HDBs, condos, landed properties with rain showers |
Water Pressure | Strong; good for rain showers |
Energy Efficiency | Moderate – uses electricity to keep water hot 24/7 |
Installation Location | Concealed in ceiling, above toilet, or storage area |
Price (unit + install) | ~$250–$600 for unit, $200–$400 install |
Popular Brands | Ariston, Rheem, Joven, Rubine |
Pros | Supports multiple points, good pressure, consistent temperature |
Cons | Takes up space, more expensive, standby heat loss |
✅ 3. Gas Water Heater
Feature | Description |
How it works | Heats water instantly using piped town gas |
Best for | Households with existing gas line (usually HDBs or landed homes) |
Water Pressure | Strong enough for most needs, but may reduce if used at multiple outlets |
Energy Efficiency | High – lower running cost compared to electricity |
Installation Location | Typically in kitchen or service yard |
Price (unit + install) | ~$300–$500 for unit, $500–$1,000 install (incl. gas piping) |
Popular Brands | Rinnai, Macro, Paloma |
Pros | Unlimited hot water, lower operating cost, energy-efficient |
Cons | Higher upfront cost, needs proper ventilation and licensed installer, limited placement options |
💡 Which One Should You Choose?
Criteria | Best Option |
Limited bathroom space | Instant heater |
Strong water pressure/rain shower | Storage or gas heater |
Lowest upfront cost | Instant heater |
Lowest running cost (long-term) | Gas heater |
Multiple bathrooms or outlets | Storage or gas heater |
Eco-friendly/energy saving | Gas heater or heat pump (if available) |
Fast, no-wait hot water | Instant or gas heater |
Final Thoughts
Understanding the ins and outs of water heaters is essential for anyone in Singapore. From identifying the right type to knowing when to replace or repair your unit, this guide equips you with the knowledge you need to make informed choices.
Investing in a quality water heater ensures your home or business remains comfortable while also promoting energy efficiency and cost savings. Whether you opt for an instant or storage water heater, regular maintenance and timely repairs are vital to keep your system running smoothly for years to come.
Now armed with this vital information, you are ready to dive in and select the perfect water heater for your home or business!
Best Water Heater Installation in Singapore
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