Stiebel Eltron Tempra 24 Plus: Powerful Heater – Excellent Choice

The Stiebel Eltron Tempra 24 Plus whole house tankless electric water heater represents a significant leap in home water heating technology. For homeowners seeking an efficient, reliable, and space-saving solution for their hot water needs, this model stands out as a formidable contender. This in-depth review will explore every facet of the Tempra 24 Plus, from its core technology to its real-world performance, helping you determine if it’s the right investment for your household.

Stiebel Eltron Tempra 24 Plus Overview

The Stiebel Eltron Tempra 24 Plus is a premium whole house tankless electric water heater designed to deliver on-demand hot water with exceptional efficiency. Unlike traditional tank-style heaters that constantly heat and store water, this unit only activates when hot water is called for, consuming energy solely when needed. This fundamental difference is key to its significant energy savings and environmental benefits.

Stiebel Eltron, a German company with a long-standing reputation for engineering excellence in heating technology, has packed the Tempra 24 Plus with advanced features. Its robust 24 kW heating capacity ensures it can meet the demands of most medium to large-sized homes, even in colder climates, providing a continuous flow of comfortably hot water for multiple applications simultaneously. This means no more waiting for the tank to refill or experiencing cold water interruptions during showers.

The core philosophy behind tankless water heaters like the Stiebel Eltron Tempra 24 Plus is to provide hot water exactly when and where it’s needed, eliminating standby heat loss. This translates directly into lower utility bills and a reduced carbon footprint. The ‘Plus’ in its name signifies enhanced capabilities, primarily its Advanced Flow Control technology, which is crucial for maintaining consistent output temperature regardless of fluctuating incoming water pressure or flow rates.

Homeowners considering a switch to a tankless system often prioritize efficiency, comfort, and space. The Tempra 24 Plus addresses all these concerns with its compact, wall-mountable design that frees up valuable utility space. Its quiet operation further adds to its appeal, making it an unobtrusive addition to any modern home. Understanding these foundational aspects helps set the stage for appreciating its specific features and benefits.

The unit’s sleek design also makes it less of an eyesore compared to bulky traditional tanks. This aesthetic advantage, combined with its functional superiority, contributes to its overall value proposition. It’s not just a utility appliance; it’s an upgrade to your home’s infrastructure that enhances comfort and efficiency for years to come.

For more technical details on tankless water heaters, you can visit Wikipedia’s Tankless Water Heater page.

Stiebel Eltron Tempra 24 Plus Key Features & Specs

The Stiebel Eltron Tempra 24 Plus is engineered with several impressive features that contribute to its high performance and user satisfaction. Understanding these specifications is vital for assessing its suitability for your specific needs. Its design prioritizes both efficiency and consistent hot water delivery, setting it apart from many competitors.

At its heart, the Tempra 24 Plus boasts a powerful 24 kW heating element, operating on 240V, single-phase, 50/60 Hz electrical supply. This robust power allows it to heat water rapidly and maintain desired temperatures even during peak demand. This high wattage is essential for ensuring a comfortable hot water experience across multiple fixtures.

One of the most critical features is its Advanced Flow Control (AFC). This patented technology automatically adjusts the flow of water to maintain a consistent output temperature, even when multiple showers or faucets are running simultaneously. If the demand for hot water exceeds the unit’s capacity at the set temperature, the AFC will slightly reduce the water flow to prevent any noticeable temperature drops, ensuring a stable and comfortable experience.

The unit also features self-modulating power regulation. This means the Tempra 24 Plus only uses the precise amount of electricity needed to heat the water to the desired temperature, based on the incoming water temperature and flow rate. This intelligent power management maximizes energy efficiency, preventing wasteful operation and saving you money on electricity bills.

With a compact design, measuring approximately 14-1/2 inches wide, 14-1/2 inches high, and 4-5/8 inches deep, the Stiebel Eltron Tempra 24 Plus is significantly smaller than traditional tank heaters. This allows for flexible installation in tight spaces, such as utility closets, basements, or even under sinks in some commercial applications, freeing up valuable floor space in your home.

A clear digital temperature display with a touch-sensitive control panel allows for precise temperature setting. Users can adjust the output temperature in 1-degree Fahrenheit increments, typically between 86°F and 140°F, providing complete control over their hot water experience. This level of precision is a major convenience for users with specific temperature preferences.

Installation is designed to be straightforward for qualified electricians and plumbers, with standard 3/4-inch NPT water connections. The unit is built with durable components, including copper heating elements, ensuring a long operational life and reliable performance. Stiebel Eltron’s commitment to quality is evident in the robust construction of the Tempra 24 Plus.

Finally, the unit operates exceptionally quietly. Without the constant rumbling or heating sounds associated with tank-style heaters, the Tempra 24 Plus provides hot water without any auditory disturbance. This quiet operation is a subtle yet significant advantage, contributing to a more peaceful home environment. Its comprehensive feature set makes it a top-tier choice for modern hot water solutions.

Pros & Cons

Evaluating the advantages and disadvantages of any product is crucial for making an informed decision. The Stiebel Eltron Tempra 24 Plus, while a high-performing unit, comes with its own set of strengths and weaknesses that potential buyers should consider carefully. These factors can significantly influence overall satisfaction and suitability for different households.

Pros:

• Exceptional Energy Efficiency: One of the most compelling reasons to choose the Tempra 24 Plus is its energy efficiency. By heating water only when needed, it eliminates standby heat loss common in tank heaters, potentially saving 15-20% on water heating costs. This self-modulating technology ensures minimal energy waste.
• Continuous Hot Water Supply: Say goodbye to cold showers! This unit provides an endless supply of hot water, capable of supporting multiple showers, a dishwasher, and a washing machine simultaneously without running out. This is a game-changer for larger families or homes with high hot water demand.
• Space-Saving Design: Its compact, wall-mounted form factor is a huge advantage, especially in homes where space is at a premium. It frees up valuable floor space in utility closets, basements, or garages that a bulky tank heater would occupy.
• Advanced Flow Control (AFC): The patented AFC technology ensures a consistent hot water temperature, even if flow rates fluctuate. This means a more comfortable and predictable shower experience, avoiding sudden temperature changes that can be jarring.
• Precise Temperature Control: The digital display allows users to set the desired water temperature with 1-degree Fahrenheit accuracy. This level of control enhances comfort and can help prevent scalding, making it safer for households with children or elderly individuals.
• Durability and Reliability: Stiebel Eltron is known for its robust German engineering. The Tempra 24 Plus is built with high-quality components, promising a long operational life and consistent performance. This translates to fewer worries about breakdowns and replacements.
• Quiet Operation: Unlike some tank heaters that can make noise during heating cycles, the Tempra 24 Plus operates very quietly. Its electric heating elements do not produce combustion noise, contributing to a more peaceful home environment.

Cons:

• High Electrical Requirements: This is arguably the biggest hurdle for many homeowners. The 24 kW unit requires a substantial 240V electrical service, typically needing a dedicated 100-amp breaker. Older homes or those with smaller electrical panels might require a costly electrical upgrade, including new wiring and a larger breaker, or even a panel replacement.
• Significant Upfront Cost: The initial purchase price of the Stiebel Eltron Tempra 24 Plus is higher than many traditional tank-style water heaters. When factoring in potential installation costs, especially if an electrical upgrade is needed, the total investment can be considerable. While long-term savings often justify this, it’s a significant initial outlay.
• Flow Rate Limitations (in extreme cold): While excellent, even the 24 kW unit has limitations, particularly in regions with very cold incoming water temperatures (e.g., below 40°F). In such scenarios, the maximum achievable flow rate at a comfortable temperature might be slightly reduced, potentially limiting simultaneous usage of multiple high-flow fixtures.
• Potential for ‘Cold Water Sandwich’ Effect: While less common with advanced units like the Tempra Plus, some tankless heaters can briefly deliver cold water when a hot water tap is turned off and then quickly on again. This is due to residual hot water in the pipes cooling before the heater can re-engage.
• Professional Installation Recommended: Due to the high electrical demands and plumbing intricacies, professional installation is strongly recommended. This adds to the overall cost and complexity, and DIY installation is generally not advised unless you have extensive experience.

Who Should Buy the Stiebel Eltron Tempra 24 Plus?

Deciding if the Stiebel Eltron Tempra 24 Plus is the right choice for your home involves considering your specific hot water needs, existing infrastructure, and long-term financial goals. This tankless electric water heater is not a one-size-fits-all solution, but it excels in certain scenarios, offering significant benefits to the right user. Let’s explore who would most benefit from this powerful and efficient appliance.

Firstly, homeowners looking to maximize energy efficiency and reduce utility bills should seriously consider the Tempra 24 Plus. If you’re currently using an old, inefficient tank-style water heater, the savings from eliminating standby heat loss can be substantial over the lifespan of the unit. This makes it an excellent investment for environmentally conscious individuals and those focused on long-term cost reduction.

Secondly, households that frequently experience a shortage of hot water will find this unit revolutionary. If your family of four or more often finds themselves waiting for the hot water tank to refill, or if multiple people need to shower back-to-back, the Stiebel Eltron Tempra 24 Plus offers an endless supply of hot water. This capability ensures comfort and convenience, even during peak morning or evening routines.

Those with limited utility space will also appreciate the compact, wall-mounted design. If your current water heater takes up valuable real estate in a small utility closet, basement, or garage, switching to a tankless system like the Tempra 24 Plus can free up that space for storage or other uses. Its unobtrusive presence is a significant benefit for modern, space-conscious homes.

New home constructions or major renovations present an ideal opportunity for installing the Stiebel Eltron Tempra 24 Plus. In these situations, it’s easier and often less costly to incorporate the necessary electrical upgrades (dedicated 240V, 100A circuit) into the initial planning and building process. This avoids the retrofitting challenges and expenses that older homes might face.

However, it’s also a viable option for owners of older homes, provided they are prepared for the potential electrical panel upgrade. If your home has an outdated electrical system, the investment in upgrading it for the Tempra 24 Plus can be seen as a broader improvement to your home’s infrastructure, preparing it for other modern electrical appliances. This upgrade can add significant value to your property in the long run.

Finally, anyone who values precise temperature control and a consistent hot water experience will appreciate the advanced features of the Tempra 24 Plus. Its digital display and Advanced Flow Control ensure that your hot water is always at the desired temperature, providing a level of comfort and predictability that enhances daily living. This makes it suitable for families with young children or elderly members where consistent water temperature is important for safety.

In summary, the Stiebel Eltron Tempra 24 Plus is best suited for homeowners who are ready to make an initial investment for long-term energy savings, desire continuous hot water, have space constraints, or are undertaking new construction/major renovations. It’s a premium product for those seeking top-tier performance and efficiency in their hot water system. For more information on Stiebel Eltron products, you can visit their official website at Stiebel Eltron USA.

FAQ about Stiebel Eltron Tempra 24 Plus

Here are some frequently asked questions about the Stiebel Eltron Tempra 24 Plus to help clarify common concerns and provide further insight into this advanced tankless water heater.

Q1: What are the electrical requirements for the Stiebel Eltron Tempra 24 Plus?

A1: The Tempra 24 Plus requires a substantial electrical service. It operates on 240V, single-phase, and draws a maximum of 100 amps. This typically means you’ll need a dedicated 100-amp double-pole breaker and appropriate gauge wiring (e.g., 2 x 6 AWG with ground) run directly from your electrical panel. It is crucial to verify your home’s electrical panel capacity before purchase and consult with a licensed electrician for proper installation.

Q2: How much hot water can the Stiebel Eltron Tempra 24 Plus produce?

A2: The flow rate depends heavily on the incoming water temperature and the desired output temperature. For instance, with an incoming water temperature of 60°F, the Tempra 24 Plus can deliver approximately 4 gallons per minute (GPM) at a 105°F rise. This is generally sufficient for two showers running simultaneously in most climates. In warmer climates with higher incoming water temperatures, its capacity increases significantly, potentially handling three fixtures.

Q3: Is professional installation necessary for the Tempra 24 Plus?

A3: Yes, professional installation by a licensed electrician and plumber is highly recommended, if not mandatory. The high electrical demands require expert wiring to ensure safety and compliance with local codes. Additionally, proper plumbing connections and venting (if applicable to other models, though not for this electric unit) are crucial for optimal performance and to avoid leaks or damage. DIY installation without proper expertise can be dangerous and void warranties.

Q4: How much energy can I save with the Stiebel Eltron Tempra 24 Plus compared to a traditional tank heater?

A4: Energy savings can vary, but many users report saving 15-20% on their water heating costs compared to conventional tank heaters. This is primarily due to the elimination of standby heat loss, as the tankless unit only heats water on demand. The precise savings depend on your household’s hot water usage patterns, electricity rates, and the efficiency of your previous water heater.

Q5: What is the lifespan and warranty for the Stiebel Eltron Tempra 24 Plus?

A5: Stiebel Eltron generally offers a 7-year warranty on leakage and a 3-year warranty on parts for the Tempra series when installed in residential applications. Tankless water heaters typically have a longer lifespan than tank models, often lasting 15-20 years or more with proper maintenance. Regular flushing and descaling can extend the unit’s operational life significantly.

Q6: Can the Stiebel Eltron Tempra 24 Plus handle multiple hot water fixtures at once?

A6: Yes, the 24 kW capacity of the Tempra 24 Plus is designed for whole-house applications and can typically handle multiple fixtures simultaneously. Depending on the incoming water temperature and the desired output, it can comfortably supply hot water for 2-3 showers, a dishwasher, or a washing machine concurrently. Its Advanced Flow Control helps maintain consistent temperature even under high demand.

Q7: What maintenance does the Stiebel Eltron Tempra 24 Plus require?

A7: Tankless water heaters, including the Tempra 24 Plus, benefit from periodic maintenance, primarily flushing the system to remove mineral buildup (scaling). The frequency depends on your water hardness; in areas with very hard water, annual flushing might be necessary. In soft water areas, every 2-3 years might suffice. This process helps maintain efficiency and extend the unit’s lifespan.

Q8: Does the Tempra 24 Plus have a minimum flow rate for activation?

A8: Like most tankless water heaters, the Stiebel Eltron Tempra 24 Plus requires a minimum flow rate to activate its heating elements. This is typically around 0.5 GPM (gallons per minute). If the water flow is below this threshold, the heater will not engage, which is a common characteristic of tankless systems to prevent short cycling and ensure efficient operation.

Final Verdict

The Stiebel Eltron Tempra 24 Plus stands out as a highly capable and efficient whole house tankless electric water heater. Its German engineering, coupled with advanced features like Advanced Flow Control and self-modulating power, ensures a consistent, endless supply of hot water while significantly reducing energy consumption. For those seeking to upgrade their home’s hot water system, it presents a compelling case, especially for medium to large households.

While the initial investment and the substantial electrical requirements might be a consideration for some, the long-term benefits in energy savings, comfort, and space optimization often outweigh these upfront costs. It’s a robust solution for homeowners who value reliability, efficiency, and the luxury of never running out of hot water. The Tempra 24 Plus is more than just a water heater; it’s an investment in your home’s comfort and efficiency for years to come.

Ultimately, if your home’s electrical infrastructure can support it, and you’re prepared for the professional installation, the Stiebel Eltron Tempra 24 Plus is an excellent choice that delivers on its promises. It’s a testament to superior engineering, providing a modern, efficient, and highly effective solution for all your domestic hot water needs.