Understanding puffing......in simple terms

lambda boilers might be more forgiving, able to handle different wood loads/mc and split sizes ect., but everything has a threshold. This is where knowing you boiler's limits is important, too much small dry wood in any boiler regardless of control strategy will usally puff. Think of lambda a enhancement to make something good better, it wil not turn a sows ear into a silk purse, I have tried!