Outdoor LPG Gas Water Heater | Instant Tankless Hot Water Boiler with Intelligent Temp Control

Outdoor LPG Gas Water Heater – Instant Tankless Hot Water Boiler with Intelligent Temperature Control

This outdoor LPG gas water heater provides instant, on-demand hot water without the need for a storage tank. Designed for outdoor installation, it’s perfect for outdoor showers, cabins, RVs, campsites, horse stables, pool houses, and any location where hot water is needed but indoor plumbing isn’t available. The intelligent temperature control system maintains a consistent water temperature regardless of flow rate or incoming water temperature.

Unlike traditional tank water heaters that continuously heat and reheat stored water (wasting energy), this tankless unit heats water only when you need it, resulting in significant energy savings and endless hot water supply. The compact, lightweight design makes it easy to install and relocate as needed.

Key Features

• Instant Hot Water: On-demand tankless heating — no waiting for a tank to fill, no running out of hot water
• Intelligent Temperature Control: Digital thermostat maintains consistent output temperature (30-65°C / 86-149°F adjustable)
• Energy Efficient: Heats water only when needed — up to 50% energy savings compared to tank heaters
• Outdoor Rated: Designed for exterior installation with weather-resistant housing
• 12V DC Ignition: Battery-powered ignition (no external power required) — works off-grid
• Multiple Safety Features: Overheat protection, flame failure device, anti-freeze protection, oxygen depletion sensor
• Compact & Lightweight: Easy to wall-mount and relocate
• LPG/Propane Compatible: Works with standard propane tanks (20 lb, 30 lb, 40 lb)

Specifications

Installation Guide

1. Choose location: Select an outdoor location on an exterior wall, sheltered from direct rain and snow. Ensure adequate ventilation — the unit must be installed outdoors with at least 12″ clearance from any openings (windows, doors, vents). Do NOT install indoors or in an enclosed space — risk of carbon monoxide poisoning!
2. Mount the unit: Use the included mounting bracket to secure the water heater to the wall. Ensure it is level and securely fastened. The bottom of the unit should be at least 12″ above the ground to prevent water damage.
3. Connect water lines: Connect the cold water inlet (bottom left, marked blue) to your cold water supply. Connect the hot water outlet (bottom right, marked red) to your hot water distribution. Use 1/2″ NPT fittings with Teflon tape. Install a shutoff valve on the cold water inlet for easy maintenance.
4. Connect gas line: Connect the propane gas supply to the gas inlet (bottom center, marked with gas symbol). Use a gas-rated flexible connector or rigid pipe. Install a shutoff valve on the gas line. Ensure all gas connections are tight.
5. Install batteries: Open the battery compartment on the bottom or side of the unit. Insert 2x D-cell batteries (not included) for the electronic ignition. Observe correct polarity.
6. Test for gas leaks: Turn on the propane supply. Apply soapy water to all gas connections. Check for bubbles — any bubbling indicates a leak. If you find a leak, turn off the gas, tighten the connection, and retest. NEVER use a flame to check for gas leaks!
7. Flush the system: Turn on the cold water supply. Open a hot water faucet to allow air to purge from the lines. Let the water run for 1-2 minutes to flush any debris from the installation.
8. Test operation: Turn on a hot water faucet. The unit should automatically ignite (you’ll hear the spark and the burner will light). Hot water should flow within 5-10 seconds. Adjust the temperature using the digital control panel. Verify the water temperature is consistent and the unit shuts off when the faucet is closed.
9. Final checks: Verify the burner flame is blue and stable (not yellow or sooty). Check all water and gas connections for leaks after the unit has been running for 10-15 minutes. Ensure the exhaust gases are venting freely and not entering any building openings.

Safety Features

• Flame Failure Device (FFD): Automatically shuts off gas supply if the flame goes out, preventing unburned gas from escaping.
• Overheat Protection: Shuts down the unit if the water temperature exceeds safe limits (typically 75°C / 167°F), preventing scalding and damage.
• Anti-Freeze Protection: Built-in heating element or drain plug prevents water from freezing inside the unit during cold weather. Always drain the unit if temperatures will drop below freezing.
• Oxygen Depletion Sensor (ODS): Monitors oxygen levels in the surrounding air and shuts down the unit if oxygen is depleted, preventing carbon monoxide buildup.
• High Water Pressure Protection: Pressure relief valve protects the unit from excessive water pressure (above 0.8 MPa / 116 PSI).
• Low Water Flow Protection: The unit only ignites when water flow exceeds 2.5 L/min, preventing dry firing and damage to the heat exchanger.
• Child Lock: Digital control panel can be locked to prevent accidental temperature changes by children.

Common Applications

• Outdoor Showers: Perfect for beach houses, pool areas, campsites, and horse stables
• Cabins & Tiny Homes: Provides hot water for off-grid cabins without electricity
• RVs & Campers: Can be mounted externally on an RV for additional hot water capacity
• Workshops & Garages: Hot water for hand washing, cleaning, and projects
• Agricultural Use: Livestock washing, equipment cleaning, greenhouse use
• Emergency Backup: Reliable hot water during power outages (runs on propane and batteries)
• Food Trucks & Concessions: Compact hot water solution for mobile food service

Maintenance Tips

• Descale annually: If you have hard water, descale the heat exchanger annually using a commercial descaling solution or white vinegar. This prevents mineral buildup that reduces efficiency and can cause blockages.
• Clean the air intake: Keep the air intake and exhaust areas clear of debris, spider webs, and insect nests. Spiders are attracted to the smell of propane and can build nests that block airflow.
• Check batteries: Replace the ignition batteries annually or when the spark becomes weak. Always carry spare batteries.
• Inspect gas lines: Check the gas hose and connections annually for cracks, brittleness, or corrosion. Replace if damaged.
• Drain in winter: If temperatures will drop below freezing, drain the unit completely to prevent water from freezing and cracking the heat exchanger. Open the drain plug and disconnect the water lines.
• Clean the filter: The cold water inlet has a mesh filter to catch debris. Clean it every 3-6 months by removing the inlet fitting and rinsing the filter.

Frequently Asked Questions

Q: Can this be installed indoors?

A: NO. This is an outdoor-rated water heater and MUST be installed outdoors in a well-ventilated area. Installing it indoors or in an enclosed space (garage, shed, bathroom) creates a serious risk of carbon monoxide poisoning and fire. The unit burns propane and produces exhaust gases that must be vented directly to the outside atmosphere. If you need an indoor water heater, look for a sealed-combustion (direct-vent) tankless water heater designed for indoor installation.

Q: How long does a propane tank last with this water heater?

A: Propane consumption depends on usage frequency, flow rate, and temperature rise. At full capacity (16 kW), the unit burns approximately 1.5 lbs of propane per hour. A standard 20 lb propane tank (4.7 gallons) would last approximately 13 hours of continuous use at full capacity. For typical household use (showering, dishwashing, hand washing), a 20 lb tank typically lasts 1-2 weeks. A 30 lb tank lasts 2-3 weeks, and a 40 lb tank lasts 3-4 weeks. Actual consumption varies based on your hot water usage patterns.

Q: Does this require electricity to operate?

A: No. This water heater uses 12V DC battery-powered ignition (2x D-cell batteries) and does not require any external electricity. This makes it ideal for off-grid locations, cabins, campsites, and areas without power. The batteries only power the electronic ignition — they do not heat the water. A set of D-cell batteries typically lasts 6-12 months depending on usage frequency.

Q: What’s the difference between tankless and tank water heaters?

A: Tank water heaters store and continuously heat 20-80 gallons of water in an insulated tank. They provide hot water immediately when you turn on the faucet, but you can run out of hot water if you use more than the tank’s capacity. They also waste energy by keeping water hot 24/7. Tankless (on-demand) water heaters heat water instantly as it flows through the unit, without a storage tank. They provide endless hot water (as long as propane and water are available) and only consume energy when hot water is being used. Tankless units are more energy-efficient, more compact, and have a longer lifespan (15-20 years vs. 8-12 years for tank heaters). The main tradeoff is that tankless units have a maximum flow rate — this unit provides 8-10 L/min, which is sufficient for one shower or faucet at a time but may not support multiple simultaneous high-flow uses.

Q: Can I use this with natural gas instead of propane?

A: This unit is configured for LPG (propane) use. Using it with natural gas requires a conversion kit that changes the gas orifice size and regulator pressure. Natural gas operates at a lower pressure (4-7″ WC) than propane (11″ WC) and has a different energy content per cubic foot. We do not recommend attempting a DIY conversion — contact a qualified gas technician or the manufacturer for a proper conversion kit. Using the wrong gas type can cause dangerous operating conditions including sooty flames, carbon monoxide production, and gas leaks.

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• LP Propane Gas Regulator — 2-stage automatic propane regulator

Need help choosing the right water heater for your outdoor application? Contact our technical team with your requirements. Free shipping and duties included on all orders.