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

Price: $399.00
(as of Oct 23, 2026 11:10:13 UTC – Details)

Product description

Ranein Gas Tankless Water Heatear

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Customer Reviews

4.1 out of 5 stars 745

4.1 out of 5 stars 745

4.1 out of 5 stars 745

4.1 out of 5 stars 745

4.1 out of 5 stars 745

4.1 out of 5 stars 745

Price

$399.00$399.00

$299.00$299.00

$599.00$599.00

$699.00$699.00

$579.00$579.00

$699.00$699.00

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- 4.3 GPM

2.0- 3.6 GPM

2.9- 5.3 GPM

4.2- 8.5 GPM

2.9- 5.3 GPM

4.2- 8.5 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

1/2″ NPT

1/2″ NPT

3/4″ G

3/4″ G

3/4″ G

3/4″ G

Cold Water Inlet

1/2″ NPT

1/2″ NPT

1/2″ NPT

3/4″ G

1/2″ NPT

3/4″ G

Hot Water Outlet

1/2″ NPT

1/2″ NPT

1/2″ NPT

3/4″ G

1/2″ NPT

3/4″ G

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

Powerful On-Demand Heating: 100,000 BTU & 4.3 GPM for this tankless water heater propane, supports 3-4 water points simultaneously, delivers endless propane hot water on demand with no waiting.
4 Intelligent Preset Modes: One-click switch for 4-season/Kitchen/Bathtub/Shower modes on the propane tankless water heater; 4-season auto-matches temp, kitchen defaults to 100°F, bathtub supports 50-800L volume adjustment.
Precision Temp Control: Gas-water-temperature intelligent linkage for the propane heater, 95°F-155°F adjustable range, high-temp lock prevents scalding, safe for kids and elders.
Oxygen-Free Copper Heat Exchanger: Enhances heat transfer efficiency of the propane hot water heater, corrosion-resistant and durable; paired with enhanced combustion tech for energy saving.
All-Round Safety & Anti-Freeze Protection: Equipped with dedicated anti-freeze device, resists 14°F/-10°C low temperature to effectively prevent pipe freezing and cracking; plus overheat, dry burn, exhaust blockage and low water pressure startup protection; powerful fan exhaust prevents CO leakage.
Clear LED Display & Temp Memory: LED screen shows real-time water temp, operating status and fault codes; temp memory retains preferred settings, no repeated adjustment needed for the propane tankless heater.
Included Vent Pipe & Installation Note: Comes with original vent pipe (no extra purchase) for the indoor propane tankless water heater. Install by licensed professionals, not for >2,000ft elevation. Recommend draining water completely if temp drops below 14°F/-10°C or unused for long to prevent pipe cracking.
Customers find the water heater reliable and easy to install, taking less than half an hour to set up. The device maintains consistent temperature and provides hot water on demand, with one customer noting it can handle multiple faucets simultaneously. They appreciate its quick heating speed, with one mentioning a 10-second temperature rise from 64°F to 125°F, and its energy efficiency in reducing gas bills. While some customers report the unit is still going strong, others mention it failing after 8 months of use. Additionally, several customers report leakage issues from inside the unit.