Had our biomass boiler now for about 18months and have tried a few suppliers and different pellets. Woodlets by far are the best we have had. Not much ash and the boiler runs much more efficiently with these pellets. Nicola at Land energy has been so helpful since I phoned for our first order with them in 2015. Even offered to try and change the courier company they used as the ones delivering on their behalf up here leave a lot to be desired for. Land energy's prices are much better than most of the other suppliers too. Would definitely recommend them to anyone and we will not go anywhere else.