I have been reading the forums here for about a year. I recently decided to take the plunge into a dual fuel Keystoker KA6 boiler. I just received me first load of coal for it and notice what appears to be a decent amount of stones in the coal. It is rice sized coal. I have attached a couple pictures and would appreciate feedback on if this is normal. If it is not normal, do you think it would mess up the keystoker by using this coal? The stones seems to be the same uniform size as the coal.
Need less to say, if it is not normal, I am also not happy having paid for a bunch of rocks either
I have never heard anyone mention stones of any kind on the forums so seeing this is making me leery.