Bosch / BOILER
KWB 42-3
Greenstar FS · EPA record 2314056
Source checked Sep 21, 2026
Performance & equipment details
Values below belong to EPA record 2314056. Temperature points and test metrics are preserved as reported. Missing and zero values are not substituted with estimates.
| Metric or attribute | Source value |
|---|---|
| AFUE · % | 95 |
| Equipment / loop type | Boiler |
| Fuel | Natural Gas,Propane Gas |
| Hot-water integration | Yes |
Specifications & provenance
Every value below is preserved from the source record. Checked Sep 21, 2026. Asterisks and other model wildcards are retained as published.
| Source field | Reported value | Evidence |
|---|---|---|
| pd id | 2314056 | EPA Sep 21, 2026 |
| markets | United States, Canada | EPA Sep 21, 2026 |
| fuel type | Natural Gas,Propane Gas | EPA Sep 21, 2026 |
| brand name | Bosch | EPA Sep 21, 2026 |
| model name | Greenstar FS | EPA Sep 21, 2026 |
| model number | KWB 42-3 | EPA Sep 21, 2026 |
| product type | Boiler | EPA Sep 21, 2026 |
| date qualified | 2021-11-08T00:00:00.000 | EPA Sep 21, 2026 |
| efficiency afue | 95 | EPA Sep 21, 2026 |
| energy star partner | Bosch Thermotechnology Corporation | EPA Sep 21, 2026 |
| date available on market | 2015-04-01T00:00:00.000 | EPA Sep 21, 2026 |
| energy star model identifier | ES_16809_KWB 42-3_03262018141838_8906571 | EPA Sep 21, 2026 |
| can integrate hot water heating | Yes | EPA Sep 21, 2026 |