- Input
- —
- Output (max)
- 428 MBH
- AFUE
- —
The RBI Futera III 500 is a gas-fired copper-fin commercial boiler rated 500 MBH input and 428 MBH boiler output in RBI's published ratings table, with 4:1 full modulation, Category I/II/IV venting and a 600 lb shipping weight.