We Use CookiesWe use cookies to enhance the security, performance,
functionality and for analytical and promotional activities. By continuing to browse this site you
are agreeing to our privacy policy
10 Best Outdoor Tankless Water Heaters 2025 in the United States
From leading brands and best sellers available on the web.
Related Products
How do we rank products for you?
Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.
Most Popular Categories Right Now
FAQ
Buying Guide for the Best Outdoor Tankless Water Heaters
Choosing the right outdoor tankless water heater can significantly enhance your comfort and convenience, especially if you live in an area where hot water is essential. Tankless water heaters provide hot water on demand, which means you don't have to wait for a tank to fill up and heat. This can save energy and reduce your utility bills. When selecting an outdoor tankless water heater, it's important to consider several key specifications to ensure you get the best fit for your needs.Flow Rate (GPM)Flow rate, measured in gallons per minute (GPM), indicates how much hot water the heater can produce at a given time. This is crucial because it determines whether the heater can meet your household's hot water demands. For example, a flow rate of 3-4 GPM is suitable for small households or single applications like a shower, while 7-10 GPM is better for larger households with multiple simultaneous hot water needs. Assess your household's hot water usage to choose the right flow rate.
Energy EfficiencyEnergy efficiency is measured by the unit's Energy Factor (EF) or Uniform Energy Factor (UEF). This spec indicates how efficiently the heater converts energy into hot water. Higher EF or UEF values mean better efficiency and lower operating costs. Look for models with high efficiency ratings if you want to save on energy bills and reduce your environmental footprint. Consider your usage patterns and prioritize efficiency if you use hot water frequently.
BTU RatingBTU (British Thermal Unit) rating measures the heater's heating capacity. Higher BTU ratings mean the heater can produce more hot water quickly. For larger households or colder climates, a higher BTU rating (e.g., 150,000-200,000 BTUs) is recommended to ensure a steady supply of hot water. For smaller households or warmer climates, a lower BTU rating (e.g., 100,000-150,000 BTUs) may be sufficient. Match the BTU rating to your hot water needs and climate conditions.
Temperature RiseTemperature rise refers to the increase in water temperature that the heater can achieve. This is important because it affects how hot the water will be when it reaches your tap. If you live in a colder area where the incoming water temperature is low, you'll need a heater with a higher temperature rise capability. Typically, a temperature rise of 50-70 degrees Fahrenheit is adequate for most households. Consider your local water temperature and desired hot water temperature to choose the right model.
Installation and VentingOutdoor tankless water heaters require proper installation and venting to ensure safe and efficient operation. Some models are easier to install and come with venting kits, while others may require professional installation. Consider the complexity of installation and whether you are comfortable doing it yourself or if you need professional help. Proper venting is crucial to prevent carbon monoxide buildup and ensure the heater operates efficiently. Check the installation requirements and choose a model that fits your installation capabilities.
Durability and Weather ResistanceSince outdoor tankless water heaters are exposed to the elements, durability and weather resistance are important factors. Look for models with robust construction, corrosion-resistant materials, and weatherproof features to ensure longevity. Some heaters come with protective enclosures or are designed to withstand extreme temperatures. If you live in an area with harsh weather conditions, prioritize models with high durability and weather resistance to ensure reliable performance.
Warranty and SupportA good warranty and reliable customer support can provide peace of mind and protect your investment. Warranties typically cover parts and labor for a certain period, and longer warranties indicate confidence in the product's quality. Check the warranty terms and the availability of customer support services. Choose a model with a comprehensive warranty and good support to ensure you can get help if any issues arise.