10 Best Outdoor Propane Tankless Water Heater 2025 in the United States

The Rinnai V53DeP is a versatile outdoor propane tankless water heater designed to provide endless hot water with a maximum flow rate of 5.3 gallons per minute (GPM). This is suitable for households needing to run multiple appliances simultaneously, up to four. Its compact size (13"W x 30"H) and wall-mounting design make it space-efficient and ideal for outdoor installation.

The unit is energy-efficient, only heating water when necessary, which can help reduce energy costs. Enhanced scale detection is a notable feature that helps in preventing long-term damage, potentially increasing the heater's lifespan. However, professional installation is recommended, which might add to the initial cost.

The heater also boasts high efficiency and Wi-Fi capability, allowing for remote monitoring and control. It comes with a robust warranty: 10 years for the heat exchanger, 5 years for labor, and 1 year for parts. This product is well-suited for someone looking for a reliable, long-lasting, and energy-efficient outdoor tankless water heater capable of serving a medium-sized household.

The Rheem RTGH-95DVELP-3 is designed to cater to households needing a reliable outdoor propane tankless water heater. With a maximum flow rate of 9.5 gallons per minute, this unit is capable of providing hot water for multiple applications simultaneously, which is a significant advantage for larger families or homes with many water demands. Its high BTU rating ensures efficient heating, making it an energy-conscious choice, as it only operates when hot water is needed, potentially saving users on energy bills.

One of the standout features is the built-in EcoNet Wi-Fi technology, allowing users to control settings, track energy usage, and receive maintenance alerts from their mobile devices. This makes managing your water heater much more convenient and modern. The Hot-start programming feature helps prevent cold-water bursts, ensuring an uninterrupted flow of hot water, which is particularly beneficial during peak usage times.

In terms of safety, the LeakGuard detection and prevention feature is a great addition, giving homeowners peace of mind against potential water damage. The size is compact for an indoor unit, but users may need to ensure adequate wall space for mounting.

The FOGATTI Propane Tankless Water Heater is designed for outdoor installation and offers an impressive flow rate of up to 5.1 gallons per minute (GPM). With a BTU rating of 120,000, this unit can efficiently supply hot water to multiple points in a household, making it ideal for families.

This tankless water heater stands out for its precise temperature control, capable of maintaining water temperature within a 1°F margin, which is beneficial throughout the year. Additionally, its compact size (23.9)