Solid fuel boiler manually feeded

We need:
1. Solid fuel hot water boiler.
2. Fuel: wood, wood waste, saw dust, coal etc.
3. Manually feeding.
4. 230-250 kW output power.
5. Quantity: first order 15 pcs. Then 500 pcs per year.

I need the following information:
1. How long can the boiler work with one loading with wood fuel? Do we need to make pauses to clean the boiler?
2. Weight of boiler.
3. Max water temperature in boiler.
4. Min returnable water temperature.
5. Min needed chimney draft.
6. Recommended hi