Finding a reliable refurbished gas water heater that delivers on‑demand hot water is essential for households that want steady showers and quick tap water. This guide highlights five top options, explaining who each is best for and why they were selected. Whether you need high flow for multiple fixtures or compact units for tight spaces, these models offer strong efficiency and dependable performance. Read on to compare suitability for family sizes, installation spaces, and energy goals.
| Product | BTU / GPM | Best For | Notes |
|---|---|---|---|
| APUS 95,000 BTU Indoor | 95,000 BTU / 4.42 GPM | Smaller homes with 2 showers + 1 sink | Good stability and precision |
| Ranein 190,000 BTU Indoor | 190,000 BTU / 8.5 GPM | Homes needing high simultaneous hot water | Strong flow, compact footprint |
| APUS 140,000 BTU Indoor | 140,000 BTU / Up to 6.8 GPM | Mid‑size households with multiple outlets | Fast hot water and boosted flow |
| GASLAND Gasmart E 199k BTU | 199,000 BTU / Up to 7.6 GPM | Whole‑home, CSA safety, reliable power | Energy efficient with enhanced safety features |
| EXCEL Propane LPG Tankless | Propane unit, 1.6 GPM | Vent‑free, compact setups | Simple, space‑saving option |
APUS Natural Gas Tankless Water Heater, 95,000 BTU
Best for compact homes needing reliable on‑demand hot water. This model provides 95,000 BTU with a 4.42 GPM flow and features low‑flow start at 0.66 GPM to ensure hot water reaches taps quickly. It uses high‑precision sensors and smart CPU control to keep water temperature within ±1°F of the set point (95°F–140°F), reducing temperature swings during peak use. It also emphasizes efficiency with an oxygen‑free copper heat exchanger and segmented combustion for higher thermal efficiency and energy savings.
- Best for: Small households sharing two showers and a sink.
- Why selected: Strong combination of flow, precise temperature control, and compact footprint.
- Caution: Higher BTU models may require adequate venting and gas supply sizing.
Ranein Natural Gas Tankless Water Heater, 8.5 GPM, 190,000 BTU
Best for larger households or homes with multiple simultaneous hot water demands. This unit emphasizes safety and efficiency with a robust 190,000 BTU burner and an 8.5 GPM flow rate. Its design includes a blower system that adjusts to wind and water temperature changes to support full combustion and safer operation. It’s compact for its capacity and claims quick heat delivery with minimal wait time.
- Best for: Homes needing multiple outlets running at once.
- Why selected: High flow with safety features and compact footprint.
- Caution: Installation may require careful venting planning in smaller spaces.
APUS Natural Gas Tankless Water Heater, 140,000 BTU
Best for mid‑sized homes with several simultaneous hot water needs. This model delivers 140,000 BTU and up to 6.8 GPM with instant hot water via APUS’s single‑circulation tech. The ECO smart cycle claims to improve energy efficiency, supported by a UEF around 0.81. A built‑in booster pump can increase water flow to approximately 6.8 GPM, helping two showers and two sinks run together with steady temperatures.
- Best for: Families with two showers and multiple fixtures.
- Why selected: Strong balance of flow, speed, and efficiency features.
- Caution: Ensure electrical and gas supply meet higher demand during peak use.
GASLAND Gasmart E 199k BTU Tankless
Best for whole‑house use with a focus on energy efficiency and safety. This unit operates at 199,000 BTU with a maximum flow of 7.6 GPM, designed to deliver continuous hot water for showers, laundry, and dishes. It holds CSA certification and emphasizes safety features and environmental considerations, including a lower NOx footprint compared to older tanks.
- Best for: Larger homes needing reliable on‑demand hot water across multiple fixtures.
- Why selected: High flow, CSA safety, and compact design for indoor installation.
- Caution: Higher capacity may require adequate venting and gas supply sizing.
EXCEL PROPANE LPG Tankless Gas Water Heater
Best for propane setups and vent‑free applications where space is at a premium. This compact LP gas tankless unit operates on propane with a 1.6 GPM output, making it suitable for smaller homes, cabins, or apartments where a full gas line installation is not feasible. It starts with relatively low water pressure requirements and is designed for easy, quick setup.
- Best for: Narrow spaces and ventless installations with modest hot water needs.
- Why selected: Vent‑free operation and compact footprint.
- Caution: Lower flow means it’s best for limited simultaneous use.
Buying Guide: Key Considerations For Refurbished Gas Tankless Heaters
- What size is right for my home? Match BTU and GPM to your peak hot water needs. Higher BTU and GPM support more simultaneous fixtures.
- Where will it be installed? Check space, venting requirements, and electrical or gas supply capacities.
- Is energy efficiency important? Look for high UEF ratings and smart controls that reduce standby loss and adjust to demand.
- Gas type and fuel availability? Ensure the unit uses the correct gas type (natural gas or propane) for your home.
- Maintenance and parts availability? Choose models with widely available replacement parts and service networks.
- Safety features? CSA/UL certifications, flame safety, and overheat protections are important for indoor use.
Frequently Asked Questions
- What does “tankless” mean for refurbished units? They heat water on demand without storing hot water in a tank, reducing standby losses.
- Can refurbished gas water heaters save energy? Yes, many units achieve high efficiency with modern heat exchangers and combustion technology.
- Do I need professional installation? Yes. Gas line, venting, and electrical connections require licensed installation for safety and code compliance.
- How does flow rate affect performance? Higher GPM supports more simultaneous outlets; plan for worst‑case demand.
- What about venting requirements indoors? Most indoor units require proper venting to exhaust combustion byproducts safely.
- Are refurbished units reliable? When purchased from reputable sellers and properly installed, refurbished units can deliver consistent hot water.