hello all, i am looking for some help on burners in my propane forge, i build a couple different styles of venturi burners and they worked fantastic on the cement block and then i closed the door to my very large forge and couldn't get any heat out of them, backpressure i am sure, so, i went to some blown burners and i have one in there, but i am concerned that it wont make enough heat. i used 1-1/4 x 9" black pipe, 1-1/4" TEE a gas jet with an .035 mig tip stuck in the side, an old blower from a powervent hot water heater hooked up to the run and i put concentric tubes in the middle of the burner for a flame holder, and i seem to struggle to get heat out of it. i hooked this blower up to one of the ventrui burners and i could get heat in minutes, but this one is struggling. do you guys think my blower is too small, my burner tube not the right size, maybe shouldn't have the flameholder tubes welded in the end? what do you guys think, should i go back to 1" for the burner tube, or go up to 1-1/2" or maybe my blower isn't putting enough air over there? i don't know right now, i am thinking of using my venturie burners hooked up to the blower, i suppose that might work too? let me know what you guys think? i will try and get some pics of stuff up here too. thanks micheal