If you’re searching for the best 95 UEF tankless water heater, it helps to separate two different numbers: UEF measures energy efficiency, while a temperature setting such as 95°F is a water-temperature target. Of these five options, the Rinnai lists a UEF of 0.98; the APUS lists 0.81 and a temperature range that starts at 95°F. The right choice also depends on your fuel, hot-water demand, and installation needs.
Below, we compare gas and electric models by their listed capacity, efficiency information, and practical fit. Treat GPM figures as a starting point: actual hot-water output depends on incoming water temperature and how many fixtures run at once.
Table of Contents
Quick Comparison
| Product | Fuel | Listed capacity | UEF listed | Best suited for |
|---|---|---|---|---|
| APUS 120,000 BTU Indoor Tankless Water Heater | Natural gas | 5.43 GPM | 0.81 | Homes needing several hot-water points and a 95°F minimum setting |
| Rinnai RX199iN Condensing Tankless Water Heater | Natural gas or propane | 11.1 GPM | 0.98 | High-demand homes seeking a high listed UEF |
| Ranein 3.6 GPM Propane Tankless Water Heater | Propane | 3.6 GPM | Not listed | Smaller households with propane service |
| GASLAND Gasmart E Indoor Propane Tankless Water Heater | Propane | Up to 7.6 GPM | 0.8 | Propane homes seeking a higher-capacity indoor unit |
| Orbek 14kW Electric Tankless Water Heater | Electric | Up to 3.38 GPM | Not listed | Homes with the required electrical capacity |
Our Picks: Best 95 Uef Tankless Water Heater reviews
1. APUS 120,000 BTU: Best for a 95°F Minimum Setting
The APUS is an indoor natural-gas model rated at 120,000 BTU and 5.43 GPM. Its listed capacity is aimed at a household using several hot-water points, with the product description estimating support for three to four points. Actual performance will depend on water temperature and simultaneous demand.
Its temperature range is 95–149°F, with a touchscreen and temperature-control sensors. That 95°F figure is the bottom of its set range—not its UEF. The stated UEF is 0.81, so this is not a 0.95-UEF model. The product also lists an oxygen-free copper heat exchanger, freeze protection that activates near 41°F, and automatic shutoff protections.
The compact wall-mounted cabinet may suit a renovation or utility area where floor space is limited. Before choosing it, confirm that natural gas, indoor venting, and the home’s hot-water demand match the unit’s requirements. The description advises draining the heater below its freeze-protection temperature or during extended non-use.
Pros:
- 5.43 GPM listed capacity for multiple hot-water points
- Temperature setting starts at 95°F
- Compact indoor wall-mounted design
- Includes freeze protection and automatic shutoff features
Cons:
- UEF is listed as 0.81, not 0.95
- Requires natural gas and a suitable indoor installation
Verdict: Choose the APUS if you want an indoor natural-gas unit with a 95°F minimum setting and its listed capacity fits your household; look elsewhere if a UEF of at least 0.95 is your main requirement.
2. Rinnai RX199iN: Best Listed UEF and High Capacity
The Rinnai RX199iN is a condensing gas tankless heater rated at 199,000 BTU and up to 11.1 GPM. The supplied product information lists a UEF of 0.98, the highest stated UEF among these picks. Its capacity is designed for homes with heavier simultaneous demand, though the actual number of fixtures it can serve depends on conditions at your home.
Smart Sense supports natural gas or propane, and the unit is described as suitable for indoor or outdoor installation with the appropriate setup. For outdoor installation, the product information specifies a separate RX-OVC vent cap. It also lists a Quick Flush feature and says Wi-Fi control requires a separate Controlr module.
This model’s high capacity and UEF make it the strongest fit here for shoppers focused on those specifications. The trade-off is installation complexity: Rinnai recommends a qualified technician. Check the installation requirements, fuel setup, and warranty terms before buying; the listed warranty terms include registration conditions.
Pros:
- Highest listed UEF in this comparison at 0.98
- Up to 11.1 GPM and 199,000 BTU listed
- Supports natural gas or propane with Smart Sense
- Indoor or outdoor installation options with the required setup
Cons:
- Professional installation is recommended
- Wi-Fi control module and outdoor vent cap are not included as standard, according to the supplied details
Verdict: The Rinnai is the clearest choice if you want the highest listed UEF and substantial capacity, provided you budget for proper professional installation.
3. Ranein 3.6 GPM: Best for Smaller Propane Setups
This Ranein is an indoor propane tankless heater rated at 80,000 BTU and 3.6 GPM. The supplied description positions it for two to three water points, making it a more modest-capacity option than the Rinnai, GASLAND, or APUS. It may be a better match for a smaller household or a less demanding hot-water setup than a large home with several showers running at once.
The unit has an adjustable 95–149°F range, four preset modes, a child lock, and an oxygen-free copper heat exchanger. Its listed safety features include overheat, dry-burn, and exhaust-blockage protection, along with freeze protection. The product description says an original vent pipe is included and advises professional installation.
No UEF figure is provided in the supplied product information, so you cannot compare its efficiency directly with the Rinnai, APUS, or GASLAND based on the listed UEF values. The description also states that the unit is not intended for elevations above 2,000 feet. Confirm that limitation and the installation requirements apply to your location.
Pros:
- Propane operation for homes set up for that fuel
- 95–149°F temperature range with preset modes
- Child lock and several listed safety protections
- Vent pipe is described as included
Cons:
- Lower listed capacity than the other gas models in this comparison
- No UEF figure is provided, and the description gives an elevation limit
Verdict: Consider the Ranein for a smaller propane-powered setup, but verify its capacity and elevation limit before deciding it can serve your home.
4. GASLAND Gasmart E: Best Higher-Capacity Indoor Propane Pick
The GASLAND Gasmart E is an indoor propane model rated up to 7.6 GPM and 199,000 BTU. Its listed UEF is 0.8, which is below the Rinnai’s stated 0.98 and slightly below the APUS’s 0.81. The higher listed GPM may appeal to a household with greater demand, but it does not guarantee that maximum output under every incoming-water condition.
The product description says the unit is CSA certified and includes overheat, flame-out, and freeze protection. Its wall-mounted, compact design is intended to save floor space. GASLAND also describes a one-year replacement offer if the heater stops working within that period; read the product’s full warranty terms to understand what is covered.
Compared with the smaller Ranein, GASLAND lists a higher maximum flow rate. However, the supplied information does not include a detailed temperature range or a more specific simultaneous-fixture estimate. Confirm the installation, venting, and fuel requirements with a qualified professional before choosing it.
Pros:
- Up to 7.6 GPM and 199,000 BTU listed
- UEF of 0.8 is stated in the product information
- CSA certification and several listed safety features
- Compact wall-mounted indoor design
Cons:
- Listed UEF is lower than the Rinnai and APUS figures
- Propane-only, based on the supplied product details
Verdict: Pick the GASLAND if you need a higher-capacity indoor propane option and its listed UEF meets your expectations; compare its installation requirements before committing.
5. Orbek 14kW: Best Electric Option for Suitable Electrical Panels
The Orbek is the only electric model in this group. It is rated at 14 kW, 240 volts, and up to 3.38 GPM, with a temperature setting range of 86–140°F. The product information says it can serve two to three points of use, but electric output and actual flow depend on the home’s electrical setup and incoming-water conditions.
Electrical requirements are a major buying consideration here. The supplied details call for a 240V, 60-amp two-pole breaker, one set of 6 AWG wires, and a household panel with at least 150 amps of total current capacity. Have a qualified electrician check your panel and wiring before purchase rather than assuming the unit is a simple swap for a tank heater.
The compact design and LED display may be useful where space is tight and gas service is not the preferred option. The product listing states ETL certification and protection against leakage, overheating, and dry heating. No UEF figure is provided, so compare its efficiency only if you can obtain the relevant product documentation.
Pros:
- Electric operation avoids the need for a gas fuel connection
- Up to 3.38 GPM listed with an adjustable 86–140°F range
- Compact design with an LED display
- ETL certification and listed safety protections
Cons:
- Requires specific 240V wiring and a 60-amp two-pole breaker
- No UEF figure is provided in the supplied details
Verdict: The Orbek can suit a home with adequate electrical capacity and moderate hot-water demand, but confirm panel compatibility with an electrician first.
How to Choose a Tankless Water Heater
Understand UEF versus temperature settings
UEF stands for Uniform Energy Factor, an efficiency measure. It is not a water-temperature setting. A model with a 95°F minimum setting does not have a UEF of 0.95. In this comparison, Rinnai lists a UEF of 0.98, APUS lists 0.81, and GASLAND lists 0.8. The supplied information does not give a UEF for Ranein or Orbek. Check the product documentation for the exact efficiency figure you need.
Size the heater for your hot-water demand
Estimate how many fixtures may run at the same time, such as showers, sinks, or laundry. Then compare that demand with the heater’s listed GPM and BTU rating. Do not treat a maximum GPM figure as a guarantee: incoming water temperature and the temperature rise required affect the hot-water flow available. A qualified installer can help size the unit for your home and local conditions.
Match the fuel and installation type
Confirm whether your home uses natural gas, propane, or electricity before comparing models. The APUS is natural-gas-only in the supplied details; Ranein and GASLAND are propane models; Rinnai supports natural gas or propane; and Orbek is electric. Also check whether the unit is intended for indoor or outdoor installation, what venting is required, and whether local codes or permits apply.
Check electrical capacity for electric models
Electric tankless heaters can require substantial electrical capacity. The Orbek listing specifies a 240V supply, a 60-amp two-pole breaker, 6 AWG wiring, and at least 150 amps of total panel capacity. Have an electrician confirm that your service and panel can support the unit before ordering. Electrical work should be completed by a qualified professional.
Consider freeze protection and seasonal use
Freeze protection does not mean a heater can be left full of water in every cold-weather situation. The APUS description advises draining the unit below about 41°F or during extended non-use, while Ranein gives its own freeze-protection details and draining instructions. Read the specific manual for the model you choose and plan for outages or long periods without use.
Compare installation and warranty details
Tankless heaters may need fuel-line, venting, electrical, or water-piping changes. Include installation requirements in your decision, not just the unit’s size or capacity. Check warranty terms, registration requirements, included accessories, and whether professional installation is recommended or required. For example, the Rinnai listing describes warranty terms that depend on registration.
Frequently Asked Questions
Does a 95°F temperature setting mean the heater has a 0.95 UEF?
No. Temperature and UEF measure different things. The APUS has a listed temperature range beginning at 95°F, while its stated UEF is 0.81.
Which model in this comparison has the highest listed UEF?
The Rinnai RX199iN has the highest UEF listed in the supplied product information, at 0.98. The APUS lists 0.81 and GASLAND lists 0.8; no UEF is supplied for Ranein or Orbek.
Can a tankless heater provide hot water to several fixtures at once?
It depends on the heater’s capacity, the incoming water temperature, and how much hot water each fixture uses. Compare the unit’s GPM rating with your expected simultaneous demand, and ask an installer to size it for your home.
Which of these models runs on electricity?
The Orbek 14kW is the electric option. Its listing specifies a 240V supply and a 60-amp two-pole breaker, along with other wiring and panel requirements. Have an electrician check compatibility.
Can I install a tankless water heater myself?
These units can involve gas, venting, electrical, and plumbing work. The Rinnai and Ranein descriptions recommend professional installation. Check local rules and have qualified professionals handle work that requires permits or specialized skills.
What should I check before buying an indoor gas model?
Confirm the fuel type, venting requirements, available installation space, local code requirements, and the home’s hot-water demand. A professional can also confirm whether the unit is correctly sized for your incoming-water temperature and expected use.
Final Recommendation
For shoppers prioritizing a high listed UEF and greater capacity, the Rinnai RX199iN is the strongest match in this comparison, with a stated UEF of 0.98 and up to 11.1 GPM. If you meant a minimum water setting of 95°F rather than a 0.95 UEF, the APUS offers that temperature range, but its listed UEF is 0.81. Choose the propane or electric alternatives only after confirming that their fuel, capacity, installation, and utility requirements fit your home.
