Tankless Water Heaters
Best Tankless Water Heater for Family of 4 (2026): 3 Models Side by Side
As an Amazon Associate I earn from qualifying purchases. Specs below come from each product's Amazon listing; we do not test products in person.
For a family of 4, the VancEpic tankless water heater leads this list as Best Overall: it supports 3 to 4 simultaneous taps at a maximum flow of 4.3 GPM with 100,000 BTU of output. The Rheem follows with the highest flow rate in this list, at 7.0 GPM.
Starting out? See the main guide: Best Tankless Water Heater
Top picks at a glance
-
Best OverallVancepic Tankless Water Heater Propane9.8 View on Amazon -
Runner-UpVELPAX Propane Tankless Water Heater9.6 View on Amazon -
Highest Flow RateRheem RTG Series 7.0 GPM Liquid Propane9.2 View on Amazon
Compare the specs
Ranked on flow rate, temperature control from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | Flow rate | Fuel | Temperature control | Weight | Warranty |
|---|---|---|---|---|---|
| 1. Vancepic Tankless Water Heater Propane | 4.3 GPM | Propane | Yes | 21.01 lb | 2-year |
| 2. VELPAX Propane Tankless Water Heater | 4.74 GPM | propane | Yes | — | — |
| 3. Rheem RTG Series 7.0 GPM Liquid Propane | 7 GPM | Liquid Propane | Yes | 39.25 lb | 1-year |
Vancepic Tankless Water Heater Propane
A propane heater with 4.3 GPM maximum flow and support for 3 to 4 simultaneous taps, with temperature adjustable from 95 to 149 degrees Fahrenheit.
- Flow rate: 4.3 GPM
- Fuel: Propane
- Temperature control
- 2-year warranty stated
Good for
- Buyers who want 3 to 4 simultaneous taps
- Owners of multi-bathroom homes who want on-demand hot water
Skip it if
- Your home is above 2,000 ft elevation
- You need more than 4.3 GPM maximum flow
It delivers a maximum flow of 4.3 GPM at 100,000 BTU, with temperature adjustable from 95 to 149 degrees Fahrenheit. It has 4-Season, Kitchen and Bathtub modes, with Kitchen adjustable to 100 degrees Fahrenheit and Bathtub set from 50 to 800L with a full-water beep. It has overheat, dry-burn and pressure relief protections, a control lock, and an anti-freeze function to 14 degrees Fahrenheit. Installation by a licensed technician is required, and an exhaust pipe is included.
VELPAX Propane Tankless Water Heater
A propane heater with 4.74 GPM maximum flow for 2 to 3 points of use, with temperature adjustable from 95 to 149 degrees Fahrenheit.
- Flow rate: 4.74 GPM
- Fuel: propane
- Temperature control
Good for
- Buyers who want 4.74 GPM for bathrooms and kitchens
- Owners of cabins and apartments who want on-demand hot water
Skip it if
- You need 4 simultaneous taps
- You need more than 4.74 GPM maximum flow
It delivers up to 4.74 gallons per minute at 68,000 BTU per hour, with temperature adjustable from 95 to 149 degrees Fahrenheit on an LED display. It has a flame failure device, anti-freeze protection and overheating protection, with a stainless steel body and an oxygen-free copper water tank. It operates with 3.6 PSI of water pressure and comes with 1/2 inch NPT fittings and a 2.5 inch horizontal vent pipe.
Rheem RTG Series 7.0 GPM Liquid Propane
A liquid propane heater with 7.0 GPM at a 35 degree Fahrenheit temperature rise, for 2 to 3 simultaneous showers.
- Flow rate: 7 GPM, the highest here
- Fuel: Liquid Propane
- Temperature control
- 1-year warranty stated
Good for
- Buyers who want the highest flow rate here
- Owners of large families with multi-bathroom homes
Skip it if
- You need indoor installation
- You want a heater under 39.25 lb
It delivers 7.0 GPM at a 35 degree Fahrenheit temperature rise with 160,000 BTU per hour output, for whole house use. It has a digital LED temperature control panel with precision plus or minus 1 degree Fahrenheit adjustments, built-in freeze protection and flame failure protection. It is for outdoor installation, with a durable metal cabinet, wall mounting by a qualified installer and mounting hardware included.
How to choose
Flow rate and simultaneous use
Flow rate, measured in gallons per minute, sets how much hot water a heater can deliver at once. The VancEpic supports 3 to 4 simultaneous taps at 4.3 GPM, the VELPAX supports 2 to 3 points of use at 4.74 GPM, and the Rheem supports 2 to 3 simultaneous showers at 7.0 GPM with a 35 degree Fahrenheit temperature rise. Compare those figures with how many taps or showers your household runs at once, rather than judging by flow rate alone.
Temperature control and output
Temperature control sets the water temperature a heater holds. The VancEpic and the VELPAX both adjust from 95 to 149 degrees Fahrenheit, and the VELPAX also has a maximum temperature rise of 149 degrees Fahrenheit. Output also differs: the VancEpic gives 100,000 BTU, the VELPAX gives 68,000 BTU per hour, and the Rheem gives 160,000 BTU per hour.
Fuel, placement and installation
All three heaters use propane: the VancEpic uses propane, the VELPAX uses propane LPG, and the Rheem uses liquid propane. The VancEpic requires installation by a licensed technician, includes an exhaust pipe, and is not for elevations above 2,000 ft. The VELPAX comes with 1/2 inch NPT fittings and a 2.5 inch horizontal vent pipe, with a smoke exhaust pipe required. The Rheem supports wall mounting by a qualified installer.
FAQ
Which heater supports the most simultaneous taps?
The VancEpic supports 3 to 4 simultaneous taps, the highest tap figure here. The VELPAX supports 2 to 3 points of use, and the Rheem supports 2 to 3 simultaneous showers.
Do all three heaters use propane?
Yes. The VancEpic uses propane, the VELPAX uses propane LPG, and the Rheem uses liquid propane.
Which heater is for outdoor installation?
The Rheem is the outdoor heater in this list. The VancEpic and the VELPAX are indoor heaters.
What temperature control do these heaters have?
The VancEpic and the VELPAX adjust from 95 to 149 degrees Fahrenheit. The Rheem has a digital LED temperature control panel with precision plus or minus 1 degree Fahrenheit adjustments.
