Looking for cleaner burn. Do you guys think its possible for secondary burn in a indoor boiler[ DS Aqua gem 3200 ] Its a conventional boiler not gasser. im thinking something similar to the englander 28- 3500 sorry if model is wrong. DS comes with secondary air ports in back rear of boiler.I was thinking of trying to add pipe to the port holes and run pipes above the fire. what do you think?? please i would appreciate any ideas or comments