If you’re upgrading a gas water heater and need steady hot water for multiple fixtures, a 65 gallon capacity is a solid choice. This guide highlights five top gas models that balance flow, efficiency, and installation needs. Best for large households, commercial use, or properties with high simultaneous hot water demand, these units cover traditional storage heaters and modern tankless options. Below is a quick, practical snapshot of each contender to help you compare at a glance.
Choosing the right model depends on your space, climate, and water usage. The table summarizes the five products selected here, including capacity, primary use, and installation considerations.
| Product | Best For | Key Benefit |
|---|---|---|
| 65 gal. Commercial Gas Water Heater, NG, 360000 BtuH | Small to mid-size commercial spaces; garages or shops | High capacity storage for steady totals |
| GASLAND Gasmart E 199,000 BTU Tankless Water Heater | Homes needing continuous on-demand hot water | Space-saving with high efficiency |
| Rheem RTG Series 7.0 GPM Tankless Water Heater Indoor | Large homes with many showers | Reliable on-demand performance |
| APUS Natural Gas Tankless Water Heater, 95,000 BTU | Smaller homes or apartments needing compact unit | High efficiency and precise control |
| Rheem RTG Series 8.4 GPM Tankless Water Heater Outdoor | Homes with outdoor installation or limited indoor space | Outdoor design with strong capacity |
65 Gallon Commercial Gas Water Heater, NG, 360000 BTUH
This 65 gal. commercial unit delivers 360,000 BTU/hour and is best for small-to-mid-size commercial settings or sites where a robust storage heater is needed. It provides reliable hot water for businesses with steady demand. The model’s construction notes include being manufactured by Rheem-Ruud in the United States. It suits facilities such as shops, small offices, or multi-tenant spaces that require a consistent hot-water supply. A potential limitation is that it relies on a storage tank, which may have longer recovery times during peak usage compared to tankless options.
GASLAND Gasmart E 199,000 BTU Tankless Water Heater
Ideal for households seeking unlimited hot water on demand without a bulky storage tank. This GASLAND model is CSA certified with safety features and an energy efficiency of up to 0.8 UEF, delivering about 34% energy savings versus a typical 50-gallon tank. It’s notably space-saving, designed for indoor installation in closets, basements, or laundry rooms. Best for how households manage simultaneous demands, such as two or three fixtures running simultaneously. A limitation to consider is the capacity—high-demand multi-bath homes may prefer larger GPM options.
Rheem RTG Series 7.0 GPM Natural Gas Tankless Water Heater Indoor
This indoor tankless model provides 7.0 GPM at a 35°F rise, equating to about 160,000 BTU/hour. It’s designed for whole-house use, suitable for large families with multiple showers or bathrooms running simultaneously. The non-condensing design prioritizes reliability and straightforward venting. Best for indoor installations where space-saving matters and outdoor venting isn’t feasible. Choose this if you want a robust on-demand system and don’t require outdoor placement features.
APUS Natural Gas Tankless Water Heater, 95,000 BTU
APUS offers a compact, high-capacity on-demand heater with 95,000 BTU and 4.42 GPM, suitable for 2 showers plus a sink. It emphasizes precise temperature control within a narrow range and high efficiency with up to 0.81 UEF. Oxygen-free copper heat exchangers and segmented combustion support durable operation and energy savings. Best for smaller homes or spaces where floor area is a premium. A limitation is that higher simultaneous demand in larger homes may necessitate additional units or a higher GPM model.
Rheem RTG Series 8.4 GPM Outdoor Tankless
This outdoor installation tankless unit handles larger households or homes with heavy hot-water use, offering 8.4 GPM at a 35°F rise with 180,000 BTU/hour. Outdoor placement reduces indoor venting needs and can simplify installation in spaces with limited interior room. It’s a strong pick for families with multiple bathrooms and frequent simultaneous hot-water usage. A caveat is outdoor exposure—weatherproofing and proper mounting must be ensured by a qualified installer.
Buying Guide: Key Purchase Considerations
What size is right for your home or business?
Storage vs. tankless: Storage heaters supply a fixed volume; tankless models provide on-demand hot water. For households with multiple showers in use at once, a tankless option with sufficient GPM is often preferred.
What installation constraints exist?
Indoor vs. outdoor placement affects venting, space, and electrical or gas line requirements. Outdoor models typically require weatherproofing and appropriate mounting, while indoor units demand venting compatibility and accessible service space.
How important is efficiency?
UEF values indicate energy efficiency; higher is better. Tankless units generally achieve higher efficiency than tank-style heaters, but actual savings depend on usage patterns and climate.
What about safety features?
CSA certification, flame sensors, pressure relief, and anti-freeze protection are important for safe operation, especially in climates with freeze risks or in commercial settings with variable demand.
What is maintenance and service like?
Tankless systems often require periodic descaling in hard-water areas and filter checks. Storage water heaters may require anode rod inspections and periodic flushing to prevent sediment buildup.
FAQ
- Do I need a 65 gallon tank for a home?
Not always. This size is common for larger households or commercial spaces with high simultaneous hot-water demand. A tankless system can also meet demand with the right GPM rating. - Is outdoor installation better than indoor?
Outdoor installation eliminates indoor venting but requires weatherproofing and durable mounting. Indoor units save space but need proper venting and clearance. - What dominates energy bills, storage vs. tankless?
Tankless units typically offer better energy efficiency on a per-use basis, especially in homes with variable hot-water demand. Overall savings depend on usage patterns and climate. - How do I choose between GPM and BTU ratings?
GPM measures flow at a given temperature rise; BTU indicates heating capacity. For whole-house needs, prioritize GPM at your typical temperature rise and ensure adequate BTU for peak usage. - Is professional installation required for these units?
Yes. Tankless systems and high-capacity storage heaters involve gas, venting, and electrical work that should be performed by a licensed professional. - What maintenance helps extend the life of a gas water heater?
Flushing sediment from storage tanks and descaling tankless units in hard-water areas, inspecting connections, and replacing worn components as needed.