Looking Beyond the Rheem IKONIC 8.4 GPM Propane? 6 Alternatives Worth a Look
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
You might be looking for rheem ikonic 8 4 gpm propane alternatives if this unit does not fit your specific needs. The Rheem IKONIC 8.4 GPM Propane heater delivers 157,000 BTUs and 8.4 GPM with built-in WiFi and recirculation. It is designed for indoor use and features a compact footprint with minimal side clearance. These specs make it a strong choice for whole-house heating and smart control.
However, you may prefer a different flow rate, fuel type, or installation location. Some buyers want outdoor mounting, non-condensing efficiency, or natural gas instead of propane. Others might seek a lower price point or simpler digital controls without smart features. We selected these alternatives because their specifications overlap with the original. Each option shares key attributes like propane fuel or similar flow rates, ensuring they can handle comparable household demands while offering distinct advantages in size, venting, or connectivity.
Our top pick: Rheem IKONIC 8.4 GPM Propane Tankless Heater.
How each alternative compares
Rheem RTGH Series 8.4 GPM Indoor Propane
The Rheem RTGH Series 8.4 GPM Indoor Propane shares the same high-efficiency condensing technology and 8.4 GPM flow rate as the IKONIC model. It also includes EcoNet WiFi connectivity for remote control. The main difference is physical size. This unit measures 23.7 inches tall and weighs 59.9 pounds, making it lighter and shorter than the IKONIC’s 28.6-inch height and 86-pound weight. You get the same energy-saving recirculation features in a more compact footprint. Choose this if you need high efficiency and smart control but have limited vertical space or prefer a lighter installation.
Rheem 8.4 GPM Indoor Propane Tankless Water Heater
The Rheem RTG Series 8.4 GPM Indoor Propane offers the same 8.4 GPM flow rate for whole-house hot water. However, it uses non-condensing technology rather than the IKONIC’s high-efficiency condensing design. This means it may use more energy to heat the same amount of water. It also lacks the built-in recirculation pump found in the IKONIC, which saves water by eliminating wait times. The unit is smaller at 24.2 inches tall and weighs only 46.5 pounds. Pick this model if you prioritize a lighter, simpler indoor heater and do not need smart WiFi features or maximum energy efficiency.
Rheem RTGH 8.4 GPM Indoor Natural Gas Heater
The Rheem RTGH 8.4 GPM Indoor Natural Gas heater matches the IKONIC’s 8.4 GPM flow rate and high-efficiency condensing design. It shares the same compact dimensions of 17.7 inches wide and 23.7 inches tall. The key difference is the fuel source. This model runs on natural gas instead of liquid propane. It also lacks the built-in recirculation feature present in the IKONIC Propane version. If your home is connected to a natural gas line, this unit provides similar heating performance and smart control via WiFi without the need for propane tanks or conversions.
Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater
The Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater delivers the same 8.4 GPM flow rate but is designed for exterior mounting. It uses non-condensing technology and does not include the recirculation pump or WiFi connectivity found in the indoor IKONIC model. It is significantly lighter at 39.3 pounds and shorter at 20.8 inches tall. This unit eliminates the need for indoor venting and flue systems. Choose this alternative if you prefer outdoor installation to save indoor space and do not require remote smart control or water-saving recirculation features.
MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi
The MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi offers slightly lower flow at 7.9 GPM compared to the IKONIC’s 8.4 GPM. It features a higher BTU output of 180,000 BTUs. This unit includes WiFi connectivity for remote temperature and settings control. It is lighter at 39.6 pounds and has a different dimension profile at 25 inches tall. The lower flow rate may be less suitable for large homes with multiple simultaneous uses. Select this model if you value high BTU output and smart control in a lighter package, and your hot water demand is moderate.
Rheem IKONIC 8.4 GPM Natural Gas
The Rheem IKONIC 8.4 GPM Natural Gas model is nearly identical to the Propane version in terms of features and dimensions. It shares the 8.4 GPM flow rate, 157,000 BTU output, and built-in recirculation for water savings. It also includes EcoNet WiFi connectivity. The primary difference is the fuel type, switching from propane to natural gas. The physical size remains the same at 28.6 inches tall and 86 pounds. This is the direct alternative for homes with natural gas lines that want the same high-efficiency indoor performance and smart control features as the propane IKONIC.
Quick picks
Our 7 picks
Rheem IKONIC 8.4 GPM Propane Tankless Heater
Best for: Efficient indoor propane heating with smart control
- Fuel Type
- Liquid Propane
- Flow Rate
- 8.4 GPM
- BTU
- 157,000 BTU/hr
- Installation Location
- Indoor
- Dimensions
- 28.6 x 17.3 x 13.7 inches
- Features
- WiFi
View on Amazon: Rheem IKONIC 8.4 GPM Propane Tankless Heater Affiliate link
The Rheem IKONIC RECTGH-SR84iP delivers 8.4 GPM of continuous hot water using liquid propane. It features a 157,000 BTU/hr burner and built-in WiFi for remote control. This indoor unit includes recirculation to save water and energy. Its compact design allows for flexible installation with minimal clearance. It suits homes needing reliable, efficient propane heating with smart monitoring capabilities.
Pros
- 8.4 GPM flow rate for whole-house use
- Built-in EcoNet WiFi for remote control
- Customizable recirculation saves average 11,000 gallons yearly
- Ultra-low NOx burner reduces emissions
Cons
- Indoor installation only without outdoor kit
- 86 pounds weight requires sturdy mounting
- No natural gas version in this specific model line
Good fit if
- You need high-efficiency propane heating for multiple fixtures
- You want remote monitoring via smartphone app
- You have limited clearance for installation
Skip if
- You require outdoor installation without additional kits
- You prefer natural gas over propane
- You need a model without recirculation features
Verdict: Rheem IKONIC 8.4 GPM Propane is a smart, efficient choice for homeowners who value remote control and water savings. It fits well in tight indoor spaces where high output and low emissions matter.
Rheem RTGH Series 8.4 GPM Indoor Propane
Best for: high-efficiency indoor whole-house heating
- Fuel Type
- Liquid Propane
- Flow Rate
- 8.4 GPM at 35°F rise
- BTU
- 157,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- Digital LED, ±1°F
- Certification
- CSA
View on Amazon: Rheem RTGH Series 8.4 GPM Indoor Propane Affiliate link
This Rheem unit delivers 8.4 GPM at a 35°F rise using 157,000 BTU/hr of propane. It features industry-leading condensing technology with a 0.93 UEF for efficiency. The digital LED control offers precision within ±1°F. It is designed for indoor installation with direct venting. This model suits large families needing reliable hot water for multiple bathrooms simultaneously.
Pros
- High 0.93 Uniform Energy Factor for efficiency
- Precise digital LED temperature control (±1°F)
- 8.4 GPM flow rate for whole-house use
- Ultra-low NOx emissions compliant
Cons
- Indoor-only installation requires direct venting
- No WiFi connectivity in this specific model
- 5-year parts warranty is shorter than competitors
Good fit if
- You need high-efficiency indoor propane heating
- You want precise temperature control
- You require reliable whole-house hot water
Skip if
- You need outdoor installation capability
- You require WiFi remote monitoring
- You prefer a longer parts warranty
Verdict: Rheem RTGH Series 8.4 GPM Propane is a high-efficiency indoor heater for large homes. It suits buyers prioritizing energy savings and precise temperature control over smart features.
Rheem 8.4 GPM Indoor Propane Tankless Water Heater
Best for: Whole-house propane heating without WiFi
- Fuel Type
- Liquid Propane
- Flow Rate
- 8.4 GPM at 35°F rise
- BTU
- 180,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- Digital LED, ±1°F
- Certification
- CSA
View on Amazon: Rheem 8.4 GPM Indoor Propane Tankless Water Heater Affiliate link
The Rheem RTG Series delivers 8.4 GPM of hot water at a 35°F rise, powered by 180,000 BTU/hr of propane energy. This indoor unit features a non-condensing design with a 0.82 UEF rating. You get precise digital temperature control with ±1°F adjustments. It includes built-in freeze protection and flame failure safety. The wall-mount design saves floor space for whole-house use.
Pros
- 8.4 GPM flow rate at 35°F rise
- 180,000 BTU/hr output
- Digital LED control with ±1°F precision
- 0.82 Uniform Energy Factor (UEF)
- Built-in freeze protection
Cons
- No WiFi connectivity in this 8.4 GPM model
- Indoor installation only
- Non-condensing design limits efficiency compared to condensing units
Good fit if
- You need 8.4 GPM for 3-4 simultaneous showers
- You are replacing a standard tank heater indoors
- You want precise temperature control without app dependency
Skip if
- You require outdoor installation
- You need WiFi remote monitoring
- You are looking for a condensing high-efficiency unit
Verdict: Rheem RTG Series 8.4 GPM Propane is a reliable indoor option for large families needing consistent hot water. It suits buyers who prioritize direct digital control and high flow over smart features.
Rheem RTGH 8.4 GPM Indoor Natural Gas Heater
Best for: Indoor whole-house hot water with high efficiency
- Fuel Type
- Natural Gas
- Flow Rate
- 8.4 GPM
- BTU
- 157,000 BTU/hr
- Installation Location
- Indoor
- Temperature Control
- ±1°F
- Certification
- CSA
View on Amazon: Rheem RTGH 8.4 GPM Indoor Natural Gas Heater Affiliate link
This indoor natural gas unit delivers 8.4 GPM at a 35°F rise, powered by 157,000 BTUs. It features a 0.93 UEF rating for high efficiency. The digital LED control offers ±1°F precision. It is designed for whole-house use with direct venting. This model suits large families needing consistent hot water without WiFi connectivity.
Pros
- 0.93 Uniform Energy Factor for efficiency
- Digital LED control with ±1°F precision
- 8.4 GPM flow rate at 35°F rise
- CSA certified for safety
Cons
- No WiFi connectivity
- Indoor installation only
- 5-year parts warranty
Good fit if
- You need high efficiency with a 0.93 UEF
- You want precise temperature control
- You prefer indoor direct vent installation
Skip if
- You require WiFi remote control
- You need outdoor installation capability
- You want a longer parts warranty
Verdict: Rheem RTGH 8.4 GPM Natural Gas is a solid choice for homes prioritizing energy efficiency and precise temperature management. It fits households that value indoor direct venting and do not require smart home integration.
Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater
Best for: outdoor whole-house propane heating
- Fuel Type
- Liquid Propane
- Flow Rate
- 8.4 GPM at 35°F rise
- BTU
- 180,000 BTU/hr
- Installation Location
- Outdoor
- Temperature Control
- Digital LED, ±1°F
- Certification
- CSA
View on Amazon: Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater Affiliate link
This outdoor propane unit delivers 8.4 GPM at a 35°F rise, powered by 180,000 BTUs. It features a non-condensing design that eliminates venting needs, making installation simpler for exterior walls. You get digital LED control with ±1°F precision and built-in freeze protection. The 0.82 UEF rating helps reduce energy use compared to tank heaters. It is built for whole-house demand in moderate climates.
Pros
- 8.4 GPM flow rate supports 3-4 simultaneous showers
- Outdoor installation removes complex venting requirements
- Digital LED panel allows ±1°F temperature adjustments
- Built-in freeze protection safeguards the unit
- 0.82 UEF efficiency rating saves energy
Cons
- Requires outdoor placement, limiting indoor options
- Non-condensing design is less efficient than condensing models
- No WiFi connectivity for remote monitoring
Good fit if
- You need a dedicated outdoor water heater
- You want to avoid complex venting systems
- You prefer precise digital temperature control
Skip if
- You require indoor installation
- You need WiFi smart home integration
- You live in a freezing climate without protection
Verdict: Rheem RTG Series 8.4 GPM Propane is a solid outdoor choice for homes that need high flow without venting complexity. It fits buyers who value simple exterior mounting and precise temperature control over smart features.
MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi
Best for: Indoor propane homes needing WiFi control
- Fuel Type
- Propane
- Flow Rate
- 7.9 GPM
- BTU
- 180,000 BTU/h
- Installation Location
- Indoor
- Voltage
- 120V AC
- Temperature Control
- 95–149°F, ±1°F
View on Amazon: MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi Affiliate link
This indoor propane tankless water heater delivers 7.9 GPM at 180,000 BTU. It features WiFi control for remote temperature adjustments and maintains stability within ±1°F. The sealed combustion system draws air from outside. It suits households needing steady hot water across multiple fixtures. The unit measures 25 by 16.3 by 7.3 inches and weighs 39.6 pounds.
Pros
- 7.9 GPM flow rate for simultaneous use
- WiFi app control for remote monitoring
- Temperature stability within ±1°F
- Sealed combustion draws air from outside
Cons
- Lower flow rate than the 8.4 GPM alternatives
- Only 2-year unit warranty coverage
- Indoor installation only
Good fit if
- You need WiFi control for remote adjustments
- You have an indoor propane gas line
- You want steady temperature within ±1°F
Skip if
- You need more than 7.9 GPM flow
- You require outdoor installation capability
- You want a longer than 2-year warranty
Verdict: MIZUDO 7.9 GPM Propane WiFi Heater offers precise temperature control and remote management for indoor propane setups, though its lower flow rate suits smaller demands than the 8.4 GPM competitors.
Rheem IKONIC 8.4 GPM Natural Gas
Best for: Indoor natural gas homes needing recirculation
- Fuel Type
- Natural Gas
- Flow Rate
- 8.4 GPM
- BTU
- 157,000 BTU/hr
- Installation Location
- Indoor
- Dimensions
- 28.6 x 17.3 x 13.7 inches
- Features
- WiFi
View on Amazon: Rheem IKONIC 8.4 GPM Natural Gas Affiliate link
This Rheem unit delivers 8.4 GPM of hot water using natural gas. It features built-in recirculation to save water and energy. The compact design fits indoor spaces with flexible venting options. You get super high efficiency for consistent performance. It is ideal for whole-house needs where gas is available.
Pros
- 8.4 GPM flow rate
- 157,000 BTU/hr input
- Built-in recirculation saves water
- Flexible indoor venting options
- 15-year limited warranty
Cons
- Indoor installation only
- Requires natural gas supply
- Heavier at 86 pounds
Good fit if
- You have a natural gas line
- You need indoor installation
- You want built-in recirculation
Skip if
- You need outdoor installation
- You only have propane
- You want a lighter unit
Verdict: Rheem IKONIC 8.4 GPM Natural Gas Indoor offers reliable high-efficiency heating for homes with gas lines. It suits buyers who prioritize indoor flexibility and water savings through recirculation.
Specifications side by side
| Spec | Rheem IKONIC 8.4 GPM Propane Tankless Heater | Rheem RTGH Series 8.4 GPM Indoor Propane | Rheem 8.4 GPM Indoor Propane Tankless Water Heater | Rheem RTGH 8.4 GPM Indoor Natural Gas Heater | Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater | MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi | Rheem IKONIC 8.4 GPM Natural Gas |
|---|---|---|---|---|---|---|---|
| Fuel Type | Liquid Propane | Liquid Propane | Liquid Propane | Natural Gas | Liquid Propane | Propane | Natural Gas |
| Flow Rate | 8.4 GPM | 8.4 GPM at 35°F rise | 8.4 GPM at 35°F rise | 8.4 GPM | 8.4 GPM at 35°F rise | 7.9 GPM | 8.4 GPM |
| BTU | 157,000 BTU/hr | 157,000 BTU/hr | 180,000 BTU/hr | 157,000 BTU/hr | 180,000 BTU/hr | 180,000 BTU/h | 157,000 BTU/hr |
| Installation Location | Indoor | Indoor | Indoor | Indoor | Outdoor | Indoor | Indoor |
| Voltage | not stated | not stated | not stated | not stated | not stated | 120V AC | not stated |
| Temperature Control | not stated | Digital LED, ±1°F | Digital LED, ±1°F | ±1°F | Digital LED, ±1°F | 95–149°F, ±1°F | not stated |
| Certification | not stated | CSA | CSA | CSA | CSA | CSA | not stated |
| Dimensions | 28.6 x 17.3 x 13.7 inches | 23.7 x 17.7 x 9.8 inches | 24.2 x 13.5 x 10.3 inches | 23.7 x 17.7 x 9.8 inches | 20.8 x 13.5 x 9.4 inches | 25 x 16.3 x 7.3 in | 28.6 x 17.3 x 13.7 inches |
| Venting Type | not stated | not stated | Non-Condensing | not stated | Non-Condensing | not stated | not stated |
| Features | WiFi | WiFi | WiFi | WiFi | WiFi | WiFi | WiFi |
| Weight | 86 pounds | 59.9 pounds | 46.5 pounds | 59.9 pounds | 39.3 pounds | 39.6 pounds | 86 pounds |
| Size | 8.4 GPM (w Recirc) | 8.4 GPM (Without WiFi) | 8.4 GPM (No WiFi) | 8.4 GPM (No WiFi) | 8.4 GPM (Non-WiFi) | Propane Gas, 7.9 GPM, 180,000 BTU, Indoor | 8.4 GPM (w Recirc) |
| Color | Gray | Gray | Gray | Gray | Gray | White 7.9P | Gray |
| Model | RECTGH-SR84iP | RTGH-84DVLP-3 | RTG-84DVLP-3 | RTGH-84DVLN-3 | RTG-84XLP-3 | HW180A0W-LP | RECTGH-SR84iN |
Frequently asked questions
Can I use the Rheem RTGH Series 8.4 GPM Indoor Propane if I do not need WiFi?
Yes, the Rheem RTGH Series 8.4 GPM Indoor Propane offers high-efficiency indoor whole-house heating without requiring smart features. It delivers the same 8.4 GPM flow rate as the IKONIC model. The unit measures 17.7 inches wide and 23.7 inches tall. It weighs 59.9 pounds, making it lighter than the IKONIC version. You get precise temperature control without the need for remote app connectivity.
Is there a budget-friendly indoor propane option that matches the 8.4 GPM flow rate?
The Rheem 8.4 GPM Indoor Propane Tankless Water Heater serves as a reliable budget option for whole-house heating. It provides consistent hot water for large families. This model operates without WiFi, focusing on direct digital control. It measures 13.5 inches wide and 24.2 inches tall. At 46.5 pounds, it is one of the lightest indoor propane units available in this flow range.
Does the MIZUDO 7.9 GPM heater support remote management for indoor propane setups?
Yes, the MIZUDO 7.9 GPM Indoor Propane Tankless Heater with WiFi supports remote management. It offers precise temperature control for indoor propane setups. The flow rate is slightly lower at 7.9 GPM compared to the 8.4 GPM competitors. It measures 16.3 inches wide and 25 inches tall. The unit weighs 39.6 pounds, making it a compact choice for homes with smaller hot water demands.
What is the main size difference between the IKONIC and the standard RTGH propane models?
The IKONIC model is taller and heavier due to its recirculation feature. It measures 28.6 inches tall and weighs 86 pounds. The standard RTGH Series 8.4 GPM Indoor Propane is more compact. It stands 23.7 inches tall and weighs 59.9 pounds. Both units share the same 8.4 GPM flow rate and WiFi capabilities. The RTGH is a better fit for tighter indoor spaces where height is limited.
Can I install the Rheem RTG 8.4 GPM Outdoor Propane unit without complex venting?
Yes, the Rheem RTG 8.4 GPM Outdoor Propane Tankless Water Heater is designed for simple exterior mounting. It does not require complex venting systems. This unit delivers 8.4 GPM for whole-house propane heating. It measures 13.5 inches wide and 20.8 inches tall. Weighing 39.3 pounds, it is the lightest option in this list. You get precise temperature control without the need for indoor venting infrastructure.
Are there indoor natural gas alternatives that offer the same flow rate as the propane IKONIC?
Yes, the Rheem RTGH 8.4 GPM Indoor Natural Gas Heater provides the same 8.4 GPM flow rate. It is a solid choice for homes prioritizing energy efficiency and precise temperature management. This model includes WiFi for remote control. It measures 17.7 inches wide and 23.7 inches tall. It weighs 59.9 pounds, offering indoor direct venting without requiring smart home integration if you prefer manual control.