10 Best Booster For Water Heaters 2025 in the United States

The Stiebel Eltron Tempra 24 Plus is a tankless water heater that caters to users seeking a continuous hot water supply without the interruption of traditional heaters. Its advanced flow control technology ensures a consistent temperature, making it suitable for households needing reliable hot showers. The compact design is a space saver and eco-friendly, as it includes auto-modulation to manage energy usage efficiently.

With a 24kW power rating and a wide output range from 68°F to 140°F, it is versatile for different household needs. However, it requires a significant minimum electric service of 150 A, which might be a drawback for homes not equipped to handle such a load. The installation could also require professional assistance, adding to the initial cost. Safety is addressed with options to limit maximum water temperature, preventing scalding risks. Additionally, with warranties covering leakage and parts, it promises durability and reliability.

The LED display and user-friendly controls enhance its usability. Despite its higher initial installation requirements, its energy-saving benefits could lead to reduced costs in the long run. This model is ideal for those prioritizing energy efficiency and consistent hot water delivery for a whole house, assuming their electrical setup meets the requirements.

The Hatco C-12 Compact Electric Booster Water Heater is designed to enhance your hot water supply, making it suitable for commercial settings like restaurants or small businesses that require consistent hot water for sanitation needs. With a powerful 12 KW power rating, it effectively improves temperature rise, ensuring your water meets necessary temperature standards for health and safety. The 240V-3PH (three-phase) setup provides great efficiency but may require specialized electrical infrastructure, which could be a drawback for some users.

Its dimensions of 15 x 24 x 20 inches and weight of 120 pounds show that it's relatively compact for a booster heater, but installation may still require professional assistance due to its electrical needs. One of the strong points is its compatibility with various water systems, making it a versatile choice. However, potential buyers should consider whether their existing systems can accommodate the 240-volt requirement, as this may limit its use in residential settings.

Additionally, as a commercial-grade product, it may be overkill for home use, leading to unnecessary energy costs. The Hatco C-12 Compact Electric Booster Water Heater is an excellent option for commercial establishments needing an efficient, powerful water heating solution, but it may not be the best fit for residential users or those without the proper electrical setup.

The Rheem RTEX-36 36kW Electric Tankless Water Heater is a robust choice for those seeking a powerful and efficient booster for their water heating needs. With a power rating of 36 kW and a maximum flow rate of 6 gallons per minute, it can comfortably serve households with moderate hot water demands. The model operates at 240 volts, making it suitable for most residential installations.

One notable strength of this unit is its energy efficiency, boasting a 99.8% efficiency rate, which means lower energy bills and a greener footprint. Additionally, the digital temperature control allows for precise adjustments, ensuring the water temperature is always just right. Its compact and stylish design also makes it a good fit for spaces where aesthetics are a consideration.

However, there are some points to consider before purchasing. The installation requires a 240V electrical connection, which might not be available in all homes without some electrical upgrades. While its flow rate is adequate, it might fall short for larger households or those with high simultaneous hot water usage. Safety features are not elaborated upon, so it's important to ensure that the unit complies with your local safety standards. Customer feedback is generally positive, with a 4.4 out of 5-star rating, indicating user satisfaction, but the sample size is quite small. This water heater is well-suited for medium-sized households looking for an efficient and stylish unit, but make sure your home meets the necessary electrical requirements for installation.