Ranein Propane Gas Tankless Water Heater, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

Price: $399.00
(as of Feb 09, 2026 18:33:36 UTC – Details)

Product description

1 4-section Burner

2 Oxygen-Free Copper

3 Temperature Sensor

1 Anti-Backflow Fan

2 Quiet Work

3 LED Display

1 2+8

2 About Us

3 After Sales

4 Q&A

Ranein Gas Tankless Water Heatear

Add to Cart

Add to Cart

Customer Reviews

4.2 out of 5 stars 602

4.2 out of 5 stars 602

4.2 out of 5 stars 602

4.2 out of 5 stars 602

4.2 out of 5 stars 602

4.2 out of 5 stars 602

Price

$399.00$399.00

$299.00$299.00

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Water Points

Bathroom x 2, Kitchen x 1

Bathroom x 1, Kitchen x 1

Bathroom x 2, Kitchen x 2

Bathroom x 3, Kitchen x 3

Bathroom x 2, Kitchen x 2

Bathroom x 3, Kitchen x 3

Suggested Housing

Apartment, Townhouse

Apartment

SFR, Townhouse

Single Family Residence

SFR, Townhouse

Single Family Residence

BTU

100,000 BTU

80,000 BTU

130,000 BTU

190,000 BTU

130,000 BTU

190,000 BTU

GPM

2.2- 5.0 GPM

2.0- 4.6 GPM

2.9- 6.1 GPM

4.2- 8.9 GPM

2.9- 6.1 GPM

4.2- 8.9 GPM

Mounting Location

Indoor Installation

Indoor Installation

Indoor Installation

Indoor Installation

Outdoor Installation

Outdoor Installation

Input Voltage

110- 120 Volts (AC)

110- 120 Volts (AC)

110- 120 Volts (AC)

110- 120 Volts (AC)

110- 120 Volts (AC)

110- 120 Volts (AC)

Gas Inlet

NPT 1/2″

NPT 1/2″

NPT 3/4″

NPT 3/4″

NPT 3/4″

NPT 3/4″

Cold Water Inlet

NPT 1/2″

NPT 1/2″

NPT 1/2″

NPT 3/4″

NPT 1/2″

NPT 3/4″

Hot Water Outlet

NPT 1/2″

NPT 1/2″

NPT 1/2″

NPT 3/4″

NPT 1/2″

NPT 3/4″

Flue Pipe Dia

Φ 3″

Φ 3″

Φ 3.15″

Φ 3.9″

No need

No need

Water Pressure Range

3.6- 116 PSI

14- 150 PSI

3.6- 116 PSI

3.6- 116 PSI

3.6- 116 PSI

3.6- 116 PSI

Minimum water flow

0.75 GPM

0.7 GPM

0.75 GPM

0.75 GPM

0.75 GPM

0.75 GPM

Performance: The on-demand tankless water heater boasts a heating capacity of 100,000 BTU and a hot water flow rate of 4.3 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household’s bathroom, kitchen, and bar area.
Upgrade Features: Four Seasons Function: Automatically adjust the water temperature output based on the seasonal water temperature changes. Kitchen Function: Default water output temperature is 100°F, suitable for kitchen use. Bathtub Function: Adjustable water output quantity with a reminder when the set output quantity is reached, catering to various environmental needs.
No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
Save Money: The kit already includes the exhaust pipe, so you don’t need to spend extra money on purchasing it separately. With an oxygen-free copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 1/2″ NPT water fitting and gas inlet.
Protection & Installation Note: Built-in anti-freeze unit resists low temperatures down to 14°F (-10°C); open the drain valve to empty the tank after use if temp drops below this to prevent pipe cracking. Must be installed by licensed professionals per local codes—not recommended for areas over 2,000 feet elevation.