Wood Pellet boilers from NES are robust and up to 40 kW. They also produce a range of wood burning boilers WBS Active that have a burner flange that allows for a pellet burner unit to be attached.
The WBS Magna is a 250 kW boiler that can burn logs or pellets. You do need to purchase the pellet burner and feed separately. This gives you the flexibility of operation.
This could be ideal for schools, hotels, or larger office spaces in a rural environment.