What Is an Instant Water Heater?
An instant water heater, also known as a tankless water heater, is a type of water heater that heats water on demand instead of storing it in a tank. This type of water heater is becoming increasingly popular due to its energy efficiency and convenience.
Instant water heaters work by using a heat exchanger to heat the water as it flows through the unit. A sensor detects when hot water is needed, and the unit activates to heat the water. The flow rate of the water determines the heating capacity of the unit, with higher flow rates requiring more heating capacity.
Unlike traditional water heaters that store hot water in a tank, instant water heaters provide hot water on demand. This means that there is no need to wait for the tank to fill up with hot water, and there is no risk of running out of hot water.
Instant water heaters come in different sizes and capacities to suit different needs. Point-of-use instant water heaters are designed to provide hot water to a single fixture, such as a sink or shower. These units are compact and efficient, making them ideal for small spaces.
The maximum temperature of an instant water heater can be controlled to ensure that the water is not too hot or too cold. Some units also feature self-modulating technology that adjusts the heating capacity based on the flow rate of the water.
Instant water heaters can run on different fuel types, including electricity, natural gas, and propane. The efficiency rating of an instant water heater is measured in gallons per minute (GPM) and British thermal units (BTU). A higher GPM and BTU rating means that the unit can provide more hot water at a faster rate.
Benefits of Installing an Instant Water Heater
An instant water heater, also known as a tankless water heater, provides hot water on demand without the need for a storage tank. Here are some of the benefits of installing an instant water heater:
Energy Efficiency and Savings
Instant water heaters are more energy-efficient than traditional storage tank water heaters. They only heat water when it is needed, which reduces standby energy losses. According to the Department of Energy, an instant water heater can be 24-34% more energy-efficient than a storage tank water heater. This means that homeowners can save money on their energy bills.
Space-Saving
Instant water heaters are more compact than traditional storage tank water heaters. They take up less space, which is ideal for homeowners who have limited space. This makes them perfect for small apartments or homes where space is at a premium.
Longer Lifespan
Instant water heaters have a longer lifespan than traditional storage tank water heaters. They can last up to 20 years, which is twice as long as storage tank water heaters. This means that homeowners do not have to replace their water heater as often, which saves them money in the long run.
High Flow Rate
Instant water heaters have a high flow rate, which means that they can provide hot water to multiple outlets at the same time. This makes them ideal for larger families who need to use hot water for multiple activities simultaneously.
Hot Water Recirculation
Instant water heaters with recirculation technology can provide hot water instantly without having to wait for the water to heat up. This saves water and reduces water bills.
Tips for Buying an Instant Water Heater
When it comes to buying an instant water heater, there are several factors to consider. Here are some tips to help you make an informed decision:
1. Determine the Size and Capacity
Before buying an instant water heater, consider the size and capacity that will best suit your hot water needs. If you have a large family or frequent guests, you may need a unit with a higher flow rate, such as the Ecosmart Eco 27 with a flow rate of up to 7.5 GPM.
2. Choose Between Electric or Gas Models
Instant water heaters come in both electric and gas models. Electric models are generally less expensive to purchase and install, but may not be as energy efficient as gas models. Gas models, such as the Rinnai RL75iN, are often more expensive, but can save you money on your energy bills in the long run.
3. Consider Professional Installation
While some instant water heaters can be installed by homeowners, it is often best to have a professional install the unit to ensure proper installation and avoid any potential issues with the electrical system.
4. Look for Energy Efficient Models
When shopping for an instant water heater, look for models that are energy efficient. This can help you save money on your energy bills and reduce your carbon footprint.
5. Check for Special Features
Some instant water heaters come with special features such as digital thermostats, Wi-Fi compatibility, and temperature settings. Consider which features are important to you and your hot water needs.
6. Consider Value and Budget
Instant water heaters can range in price from a few hundred to several thousand dollars. Consider your budget and the value of the unit before making a purchase.
7. Maintenance and Repair
Instant water heaters require regular maintenance, such as flushing the unit to prevent water damage and ensure proper function. Consider the maintenance requirements and potential repair costs when making a purchase.
8. Determine if a Whole House or Point-of-Use Unit is Best
Consider whether a whole house or point-of-use unit is best for your hot water needs. A whole house unit is best for larger homes or remodels, while a point-of-use unit is best for specific fixtures or hot water needs.
By considering these tips, you can make an informed decision when purchasing an instant water heater that meets your hot water needs and budget.
3 Best Instant Water Heaters in Malaysia
JOVEN SL30IP Inverter DC PUMP Instant Water Heater
The JOVEN SL30IP Inverter DC PUMP Instant Water Heater is a sleek and stylish water heater designed for indoor placement. It features an energy-saving inverter DC pump that provides 50% energy savings compared to the conventional booster pump.
Pros:
- Energy-saving inverter DC pump
- 50% energy savings compared to conventional booster pump
- Silent operation below 35dB
- Double layer 2K spray paint finish with two colour options
- Stepless electronic power control
- Slim and chromed slider bar
- Rainshower 8 inch with divearter valve 3.8 inch showerhead
Cons:
- May not be suitable for large households with high hot water demand
- Initial cost may be higher than other models
Specifications:
- Model: SL30IP
- Power: 3.6kW
- Voltage: 240V a.c. 50Hz
- Water Connection: 15mm (1/2″ BSP)
- Min. Water Flow Rate: 2 litres/minute
- Max. Water Pressure: 3.87kgf/cm² (55psi)
- Min. Water Pressure: 0.2kgf/cm² (2.84psi)
- IP Rating: IP25
- Product Dimensions (mm): 360(H) x 240(W) x 85(D)
- Product Weight: 2.5kg
JOVEN SL30IP Inverter DC PUMP Instant Water Heater is a reliable and energy-efficient water heater that is ideal for small to medium-sized households. Its inverter DC pump provides 50% energy savings compared to the conventional booster pump, and its silent operation ensures a peaceful shower experience.
Panasonic R Series DH-3RL1MW Instant Water Heater
The Panasonic R Series DH-3RL1MW Instant Water Heater is a popular choice for households seeking a safe, user-friendly, and reliable water heating solution. This model features basic yet convenient shower functions for hassle-free everyday use.
Pros：
- Instant hot water: The DH-3RL1MW provides instant hot water, which means you don’t have to wait for the water to heat up before taking a shower.
- User-friendly: The water heater is easy to use and has basic shower functions that are convenient for everyday use.
- Safe: The heater has an auto thermal cut-off feature that prevents overheating, and the reinforced polyamide heater tank is made of non-combustible material.
- Flow sensor: The heater shuts off if the water flow is too low, which prevents overheating.
Cons：
- Basic features: The DH-3RL1MW has basic shower functions and may not be suitable for those who require more advanced features.
- Low water pressure: The water heater requires a minimum water pressure of 4.9 kPa / 0.05 kgf/cm² / 0.71 psi, which may not be suitable for areas with low water pressure.
Specifications：
- Model: DH-3RL1MW
- Power Supply: AC 240V
- Power Consumption: 3.6kW
- Water Pressure Range: 4.9 – 380 kPa
- Water Connection: 15mm (1/2″)
- Heater Unit: Reinforced Polyamide
- Shower Head: Single Function
- Safety Devices: Thermal Cut-Off, Flow Sensor
- Dimensions (H x W x D): 380 x 190 x 92 mm
- Weight: 1.8 kg
Panasonic R Series DH-3RL1MW Instant Water Heater is a reliable and user-friendly water heating solution with basic shower functions. It provides instant hot water and has safety features such as an auto thermal cut-off and flow sensor. However, it may not be suitable for those who require more advanced features, and it requires a minimum water pressure of 4.9 kPa / 0.05 kgf/cm² / 0.71 psi.
Alpha Evo i/E DC Pump or Non Pump Instant Water Heater
The Alpha Evo i/E DC Pump or Non Pump Instant Water Heater is a popular choice for households looking for an efficient and reliable water heating solution. Here are some pros, cons, and specifications of this model:
Pros：
- Energy and water saving: The 36 Watt DC pump enhances showers with more power while maximizing energy and water savings.
- Customizable water pressure: The pump control feature allows users to fine-tune their shower’s water pressure to their exact liking.
- Dual safety thermal protection: The heater automatically breaks off power supply if there is an abnormal rise in shower temperatures, ensuring user safety.
Cons：
- Noise level: The pump can be noisy, which may be a concern for some users.
- Limited color options: The EVO-i model only comes in one color, which may not be suitable for all bathroom aesthetics.
Specifications：
- Pump type: DC pump or non-pump
- Pump rating: 36W
- Heater power rating: 3.64kW 240V~ 50Hz
- Water connection: 15mm (1/2″ BSP), single point system
- Operating condition: Open outlet protection against electric shock Class 1
Alpha Evo i/E DC Pump or Non Pump Instant Water Heater is a reliable and efficient option for households looking for a customizable and safe water heating solution. While it may be noisy and limited in color options, its energy and water saving features and customizable water pressure make it a popular choice among users.
