Mizudo GEN 3 199K
#16 in GasFull review
A connected indoor heater with full whole home power, though major brands give a longer warranty for similar money.
Amazon $1,199 Amazon $1,199$1,199
3.2/5
An affordable smart heater for a small home that wants app control without paying for a premium brand.
- 140,000 BTU/hHeating power
- 6.8 GPMMax flow
- 5 yearsHeat exchanger warranty
Check price at Amazon$499Check price at Amazon$499
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Built in Wi-Fi with app scheduling and voice control at a budget price
- App tracks gas use and flags error codes
- Plugs into a standard 120 V outlet
Cons
- 5 year heat exchanger warranty is short next to major brands
- No published UEF, weight or venting details
- 140,000 BTU/h limits it to about two showers in winter
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 | SH22i |
|---|---|
| Heating | |
| Fuel | Gas |
| Gas type | Natural gas or propane |
| Gas input | 140,000 BTU/h |
| Max flow | 6.8 GPM |
| Condensing | No |
| Installation | |
| Venting | Indoor |
| Features | |
| Built-in recirculation | No |
| Wi-Fi | Yes |
| Heat exchanger warranty | 5 years |
| Parts warranty | 2 years |
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