Marco Manufacturing Inc., of Lynwood, Calif., is re-emphasizing the recall of more than 22,000 gas decorative fireplaces to repair their vent systems. If the interior vent pipe separates from its connection to the exterior wall of the house, hot exhaust gases can start a fire inside the wall.

Marco is aware of 22 fires involving these fireplaces. Several of these fires caused extensive damage.

The Marco gas fireplaces subject to this recall have sealed glass-front panel and vent systems that exit the house through the sidewall. A six or seven digit model number starting with 794 or 797 can identify the fireplaces. These model numbers can be found on a label inside the unit's lower grill door. Most of the fireplaces have model designations that include the letters, "CCT." Older models have the designation "MGC36DV." The model designation can be found on the owner's manual. Gas appliance, and hearth and fireplace distributors and dealers sold these fireplaces from February 1993 through November 1997 for about $1,000, and the separate vent system for about $140. Most of these fireplaces were installed during new home construction.

Marco already has repaired about 9,000 fireplace vent systems since July 1998. All other owners need to stop using these recalled fireplaces immediately. Marco will arrange for free repair of recalled fireplaces. For additional information, assistance in determining if you have a recalled fireplace or to arrange for a free repair, consumers should call Marco at (877) 413-9850 between 7:30 a.m. and 4:30 p.m. PST seven days a week.