Rheem IKONIC S11i
#7 in GasFull review
A premium condensing heater for a large home that wants top efficiency and app control from one unit.
Amazon $1,847.43 Amazon $1,859.99$1,847.43
4.0/5
A strong pick for homes in mild climates that want full whole home power without running a vent.
- 199,000 BTU/hHeating power
- 9.8 GPMMax flow
- 0.82UEF
- 15 yearsHeat exchanger warranty
Check price at Amazon$1,280.79Check price at Amazon$1,280.79
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Mounts outside with no vent pipe, saving installation cost and indoor space
- Enough burner for three showers at once in most of the country
- Same price for natural gas and propane versions
- 15 year heat exchanger warranty
Cons
- A 0.82 UEF burns more gas than a condensing model
- Outdoor mounting is a poor fit for regions with hard freezes and long power cuts
- Labor is covered for only 1 year
The Rinnai RE family
Every Rinnai RE model we rank, smallest first. Ratings compare each against its own fuel.
| Model | Heating power | Rating | Price |
|---|---|---|---|
| Rinnai RE140e | 140,000 BTU/h | 3.3/5 | $884.10 |
| Rinnai RE199e (this one) | 199,000 BTU/h | 4.0/5 | $1,280.79 |
| Rinnai RE199i | 199,000 BTU/h | 4.0/5 | $1,280.79 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.
Specifications
| Model number | REU-VE2737WD-US |
|---|---|
| Heating | |
| Fuel | Gas |
| Gas type | Natural gas or propane |
| Gas input | 10,400 to 199,000 BTU/h |
| Max flow | 9.8 GPM |
| UEF | 0.82 |
| Condensing | No |
| ENERGY STAR | No |
| Installation | |
| Venting | Outdoor |
| Weight | 42.1 lb |
| Features | |
| Built-in recirculation | No |
| Wi-Fi | No |
| Heat exchanger warranty | 15 years |
| Parts warranty | 5 years |
Alternatives in this fuel
Gasland Gasmart E CE686
#8 in GasFull review
A low priced whole home heater for buyers who accept a short warranty and thin documentation to save several hundred dollars.
Amazon $629.99 Amazon $629.99$629.99
Rinnai RE199i
#10 in GasFull review
A dependable whole home heater for buyers who want Rinnai power at a lower price than a condensing model and have room for metal venting.
Amazon $1,280.79 Amazon $1,412.82$1,280.79
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