Quick Overview: This guide reviews five propane-capable tankless water heaters that support WiFi control or have WiFi modules available. Each unit is intended for whole-house or point-of-use hot water and offers remote control, efficiency features, and propane compatibility where noted.
| Product | Type | WiFi Capability | Max Flow |
|---|---|---|---|
| Rinnai RX199iN | Condensing Tankless | WiFi Module Optional | Up To 11.1 GPM |
| Rheem RTGH-95DVELP-3 | Condensing Tankless (LP) | Built-In EcoNet WiFi | 9.5 GPM |
| Rheem RTG-95DVELP-3 | Non-Condensing Tankless (LP) | Built-In EcoNet WiFi | 9.5 GPM |
| Rheem IKONIC RECTGH-S11iP | Condensing Tankless (LP) | Built-In EcoNet WiFi | 11.2 GPM |
| Rinnai RE140eP | Non-Condensing Outdoor Tankless | WiFi Module Optional | Up To 5.3 GPM |
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Rinnai RX199iN Tankless Heater
The Rinnai RX199iN is a condensing tankless water heater that supports both natural gas and propane via the Smart Sense gas control system. It can be installed indoors or outdoors with the appropriate vent cap (RX-OVC required for outdoor installs).
Key features include a compact footprint delivering up to 11.1 GPM, a modern interface with a Quick Flush feature for maintenance, and a very high energy efficiency factor (UEF .98). WiFi control is available through an optional Control-R module (not included) for remote monitoring and adjustments.
Installation flexibility and efficient condensing operation make this a candidate for whole-house installations where remote access is desired and a separate WiFi accessory is acceptable. Professional installation is recommended to ensure proper venting and gas configuration.
Rheem RTGH-95DVELP-3 Tankless LP
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The Rheem RTGH-95DVELP-3 is a super high efficiency condensing tankless water heater specifically configured for liquid propane. It offers continuous hot water for multiple simultaneous fixtures.
This model integrates EcoNet Wi‑Fi technology as part of its design, enabling remote temperature control, monitoring of energy and water use, alerts for maintenance, and adjustment of recirculation settings from a smartphone or mobile device.
Its 9.5 GPM capacity suits mid- to larger-sized homes. The condensing design improves energy efficiency by reclaiming heat from exhaust gases, and the built-in WiFi reduces the need for third-party modules for remote control.
Rheem RTG-95DVELP-3 Non-Condensing LP
The Rheem RTG-95DVELP-3 is a high-efficiency, non-condensing tankless water heater for liquid propane applications. It emphasizes reliability and simpler venting compared with condensing units.
Built-in EcoNet Wi‑Fi connectivity enables remote control and diagnostics. Additional features include a water-saving mode that can reduce household water use by up to 1,100 gallons per year and the same 9.5 GPM output suitable for several fixtures running together.
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Non-condensing units typically have lower installation complexity for venting, which can be an advantage in retrofit scenarios where condensing vent routing is challenging. WiFi monitoring supports proactive maintenance and performance tracking.
Rheem IKONIC RECTGH-S11iP Tankless LP
The Rheem IKONIC RECTGH-S11iP is marketed as a professional-grade super high-efficiency condensing tankless liquid propane heater. It delivers up to 11.2 GPM for extensive simultaneous hot water demand.
Like other IKONIC and Rheem models, it includes built-in EcoNet Wi‑Fi technology for remote control of temperature, energy tracking, and maintenance alerts. The combination of high flow and WiFi functionality targets larger homes and professional installations where monitoring and fine tuning are needed.
Its commercial-grade performance and connectivity make this unit suitable where both capacity and remote management are priorities. Condensing operation increases efficiency but may require more careful condensate management and venting.
Rinnai RE140eP Outdoor Tankless
The Rinnai RE140eP is a non-condensing outdoor tankless unit designed for propane and built to withstand exterior installation. It provides up to 5.3 GPM and is sized for smaller homes or point-of-use needs.
This model notes compatibility with Rinnai’s Control-R WiFi module (sold separately) for remote temperature control and diagnostics. Outdoor placement sidesteps indoor venting needs, simplifying installation in some settings.
Outdoor non-condensing units offer weather-rated housings and straightforward venting, but lower flow rates mean they’re best matched to specific household demand profiles. WiFi access via an optional module enables remote convenience when connected.
Buying Guide: Choosing A WiFi-Enabled Propane Heater
This buying guide covers the primary decision factors when selecting a propane-capable heater with WiFi control. Consider installation, performance, connectivity, efficiency, and long-term maintenance.
Tips for Getting the Best HVAC Prices
- Prioritize Quality Over Cost
The most critical factor in any HVAC project is the quality of the installation. Don’t compromise on contractor expertise just to save money. - Check for Rebates
Always research current rebates and incentives — they can significantly reduce your overall cost. - Compare Multiple Quotes
Request at least three estimates before making your choice. You can click here to get three free quotes from local professionals. These quotes include available rebates and tax credits and automatically exclude unqualified contractors. - Negotiate Smartly
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1. Fuel Compatibility And Model Type
- Propane vs. Natural Gas: Confirm the model is specifically configured for liquid propane (LP) or is gas-convertible. LP models often have different pressure and orifice requirements.
- Condensing vs Non-Condensing: Condensing units are more efficient and recover exhaust heat, but they require condensate drainage and more complex venting. Non-condensing units may simplify venting and outdoor placement.
2. WiFi Integration And App Features
- Built-In vs. Optional Module: Some units include built-in WiFi (e.g., EcoNet), while others require an extra Control-R or similar module. Built-in systems reduce add-on compatibility concerns.
- Control Capabilities: Look for remote temperature setpoints, recirculation control, usage tracking, maintenance alerts, and firmware/software update support.
3. Capacity And Household Demand
- Flow Rate (GPM): Match the unit’s GPM rating to typical simultaneous usage (showers, dishwasher, laundry). Higher GPM suits larger households.
- Temperature Rise: Consider incoming groundwater temperature and required outlet temperature; higher temperature rises reduce effective flow at the desired setpoint.
4. Efficiency And Operating Costs
- UEF And Condensing Gains: Units with higher UEF or condensing design typically lower fuel consumption for a given hot water load.
- Recirculation And Smart Scheduling: WiFi-enabled scheduling and recirculation controls help reduce standby losses and provide hot water on demand.
5. Installation Considerations
- Professional Installation: Gas appliances should be installed by a qualified technician to ensure proper venting, gas pressure, and code compliance.
- Venting And Location: Condensing units may require stainless steel or PVC venting rated for acidic condensate. Outdoor units reduce venting needs but require weather considerations.
- Electrical Needs: WiFi modules and smart controllers need stable power and reliable home WiFi signal near the heater location.
6. Maintenance, Warranties, And Support
- Descaling/Flush Requirements: Tankless heaters often need periodic flushing to manage mineral buildup; smart alerts can prompt maintenance.
- Warranty Terms: Compare heat exchanger and parts warranties; longer coverage often reflects manufacturer confidence.
- Remote Diagnostics: WiFi-enabled units that provide diagnostic codes and alerts can reduce service calls by identifying issues early.
7. Comparison Perspectives
- Performance vs. Cost: Condensing, high-GPM units (e.g., Rinnai RX199iN, Rheem IKONIC) deliver strong performance but may require more involved installation.
- Simplicity vs. Features: Non-condensing outdoor models (e.g., Rinnai RE140eP) simplify venting and are easier to place outdoors, but have lower flow rates.
- Built-In WiFi vs Optional Module: Built-in WiFi (Rheem EcoNet) provides immediate smart control; optional modules give choice but may add procurement steps.
8. Practical Tips Before Purchase
- Measure peak hot-water demand in GPM to size the unit correctly.
- Verify propane supply pressure and line sizing meet manufacturer requirements.
- Confirm local code requirements for venting, combustion air, and outdoor installations.
- Plan for reliable WiFi coverage at the heater location or consider a range extender.
- Check compatibility of third-party smart home platforms if integration beyond the vendor app is needed.