Ultimate Guide to Installing instant Water Heater

Instant water heaters are increasingly popular for their efficiency and convenience. If you’re considering installing instant water heater, understanding the process and the considerations involved is crucial to ensure optimal functionality and energy savings. Here’s what you need to know about installing instant water heater.

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Key Considerations Before Installation

  • Consumption and Usage Patterns: Assess how much hot water your household uses to determine the size and type of instant water heater that best meets your needs.
  • Budget: While instant water heaters can be more expensive upfront, they are generally more energy-efficient, potentially saving money on long-term utility bills.
  • Current Setup: Consider your existing water heater setup. Switching from a traditional to instant water heater might require additional plumbing or electrical work, impacting installation costs.
  • Space Requirements: Instant water heaters are compact and can be installed in smaller spaces, making them ideal for apartments or homes with limited space.

Installation Steps

  • Turn Off Water Supply: Ensure the water supply is shut off to avoid any potential leaks or water damage during installation.
  • Remove Existing Water Heater: If replacing an old unit, disconnect and carefully remove the existing water heater. This may involve draining the unit, disconnecting gas or electrical connections, and eliminating mounting hardware.
  • Prepare the Installation Area: Ensure the area where the new heater will be installed is clean and accessible. If the new unit is a different size or type, adjustments may be needed to the existing plumbing.
  • Install New Water Heater: Follow the manufacturer’s instructions to install the new instant water heater. This typically involves mounting the unit, making necessary plumbing connections, and setting up any electrical components.
  • Test the Installation: Once installed, turn the water supply back on and test the unit to ensure it is working correctly and there are no leaks. Adjust the thermostat to the desired temperature setting.

Why Professional Installation Matters

  • Safety: Proper installation by a professional is crucial, especially since incorrect installation can lead to water damage, electrical issues, or gas leaks if the unit is gas-powered.
  • Compliance with Local Codes: Professionals are familiar with building codes and regulations, ensuring that your installation complies with local standards and safety guidelines.
  • Expertise: Certified installers have the necessary skills and tools to handle the installation efficiently, addressing any issues that may arise during the process.
  • Warranty and Service Guarantees: Many professional installers like warranties and guarantees on their work, providing peace of mind and protection against future problems.
  • Convenience: Professional installation means you don’t have to handle the heavy lifting, complex connections, or disposal of your old unit, making the process hassle-free.

Popular Models in Singapore

For those in Singapore considering instant water heater, popular models include:

  • Ariston SMC33: Known for its reliability and efficiency.
  • Rheem RTLE-33M Prestige Plus: Offers advanced temperature control and energy savings.
  • Rubine RWH-1388: A compact model great for smaller households.
  • 707 Compact: An affordable option that doesn’t compromise on performance.


Investing in instant water heater is wise for those looking to enhance their energy efficiency and enjoy a continuous hot water supply. However, considering professional installation is essential to benefit from your investment. It ensures safety, compliance with local codes, and optimal operation of your new appliance, ultimately enriching your home’s comfort and convenience.

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