Rheem IKONIC RECTGH-S11iP Propane Tankless Water Heater
- 11.2 gpm flow rate, condensing tankless design
- 199,900 BTU heat output, liquid propane fuel
- 140 degrees F maximum water temperature
- Wall mount, indoor, outdoor only with a conversion kit
- 17.31 x 28.56 in face, 13.69 in deep
- 77.6 lb unit, stainless steel construction
- EcoNet Wi-Fi app control, usage tracking and alerts
- PRV, service valves, crossover valve kit and vent termination included
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A strong choice for a propane home that wants whole-house hot water on demand with phone control. Outdoor mounting needs an extra kit, and venting details are not given in the listing.
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ASIN: B0CBCX227TModel: RECTGH-S11iPCategory: Water Heaters
Overview
Heating water only when a tap opens, the Rheem IKONIC is a wall-hung condensing tankless unit fired by liquid propane. A dual heat exchanger is used for efficiency and durability, and the EcoNet app lets you set temperature and follow usage from a phone.
Continuous hot water for a whole house, even with a shower and dishwasher running together, is what this heater promises, along with a slim body and tight side clearance for cramped utility rooms. It burns propane only, and an outdoor conversion kit is absent from the included parts, so settle fuel supply and location first.
Who it's for
Homes on liquid propane replacing an old tank, or new builds short on floor area, are the target here. Households on natural gas or electric-only service should look at a different unit.
Pros and cons
- Continuous hot water across multiple fixtures
- EcoNet Wi-Fi control and maintenance alerts
- Ultra-low NOx burner
- Narrow side clearance for tight closets
- Liquid propane only in this version
- Outdoor install requires a conversion kit
- Heavy for one person to hang
- Vent pipe size and material not listed
Performance notes
Delivered temperature at the tap depends on incoming water temperature and how many fixtures run at once, since the burner must lift the whole flow. Condensing operation through a dual heat exchanger is how the unit reaches its high efficiency. Correct gas supply sizing and venting by the installer decide whether it reaches full output.
Specifications
| Brand | Rheem |
|---|---|
| Model | RECTGH-S11iP |
Frequently asked questions
Can the Rheem IKONIC RECTGH-S11iP be installed outside?
Yes, but only with the outdoor conversion kit. The included parts are a PRV, service valves, a crossover valve kit and a vent termination, so that kit is not in the box.
Can a tankless propane heater like the Rheem IKONIC supply a shower and dishwasher together?
The listing says it supplies hot water for the entire house even with multiple uses running, giving a shower and dishwasher as the example.
What does the EcoNet app do on the Rheem IKONIC?
It adjusts temperature settings, tracks energy and water usage, and sends maintenance alerts to a phone or mobile device.
How much side clearance does the Rheem IKONIC need?
The listing states half an inch of side to side clearance, which helps in tight closets and small utility spaces.