fireplace hearth extension rules another mantel surround clearance issue fireplace chimney clearances chimney heat glo outdoor lifestyles fortress fireplace mantel clearance codes wood fireplace mantel clearances fireplace fireplace surround minimum clearances fireplace chimney clearances chimney monessen dlx gas log clearance and chimney and fireplace clearance codes mantel clearance for masonry versus chimney and fireplace clearance codes vermont casting dvrt41 user manual lopi 616 gas fireplace insert hearth monessen dlx gas log clearance and fireplace mantel installation tips stove hearth size and thickness wfp 75 hearthstone stoves monessen gly gas log clearances and fireplace clearance design zero clearance wood gas fireplaces zero clearance wood burning fireplace zero clearance fireplace ideas for zero clearance wood fireplace ventis install a zero clearance fireplace zero clearance outdoor gas fireplace masonry vs zero clearance thermo zero clearance chimney fireplace clearances to combustible materials for 2016 international residential code is a new zero clearance fireplace right hazelmere mantel fireplaces fireplace insert vs zero clearance prefabricated fireplace installing a zero clearance fireplace mantel clearance for masonry versus fireplaces in porches jlc