Regency Horizon ® HZ54E-10 Gas Fireplace | 11|11installationIf finishing the wall above the unit with paint -the non-combustible board (shipped separatelyfrom the unit) should be installed. Facing boardmust be ordered when ordering the unit.Calcium silicate board is a high - grade materialwith cement, quartz, natural and selectedminerals as the main raw materials. It is widelyused for partitions and ceilings in buildings.It is fire proof and earthquake proof.If finishing the wall above the unit with materialssuch as tile, brick, marble, etc. non-combustibleboard available from the building supply storecan be used.Note: Calcium Silicate is 1/2" thick.Caution: This non-combustible board can be damaged ifdropped or struck. Handle with care.4"(102mm)22-3/8(568mm)20"(508mm)21-3/452-5/861-1/2" (1537mm)Non-combustibleFacing BoardNon-combustible Facing BoardNon-combustible Facing BoardMetal Stud (header)Wood StudWood StudNon-combustible Facing Board61-1/2" (1537mm)5-5/8(143mm)NON COMBUSTIBLE FACING BOARDAll four pieces (top, 2 sides, bottom) are now supplied (shipped separately) to meet the non combustible requirements. (Previously only the top wassupplied).NON-COMBUSTIBLE FACING INSTALLATIONNon-combustible boardNon-combustible board-faces and edgesMUST BE PRIMED.Non-combustible boardCaution: The non-combustible board can be damaged if dropped orstruck. Handle with care.1) Using drywall screws - secure non combustible materialaround unit, framing and top nailing strip every 6 inches.Important Note: To avoid cracking the board - pre-drill holes prior tosecuring to unit/ framing.2) Wipe any debris/dust from the non combustiblematerial and drywall.3) Prior to securing it is mandatory to prime the facing and edges using aquality primer. This will ensure proper adhesion of both the tape, mudand paint. The supplied board is very porous.Failure to follow this procedure will result in cracked seams.4) Tape the seams using a mesh type tape.5) Mud seams as normal. We recommend using aproduct called Durabond high strength compound - for the first coat.This product can be found at any hardware store.Mud must be cured as per manufacturer’s recommendations.6) Prime wall for a second time for proper adhesion of paint7) Paint walls using a high quality paint which will withstandthe high temperatures being emitted from this appliance.IMPORTANTRegency Fireplace Products are designed, produced, tested and certified to the highest industry standards.The finishing of the walls surrounding your Regency Horizon Fireplace is as critical as the installation itself.The temperatures around linear gas fireplaces are typically higher than would be acceptable for combustible materials. Your Regency Horizon Fireplace is no exception to thisrule. Therefore, the units are specified with non-combustible required materials to specific dimensions above and around the units. This is due to these areas reaching highertemperature levels than required/acceptable for a combustible material. To obtain the best, most durable finish around your fireplace, this calls for a high level of care and attentionto the preparation and finish around this appliance, using only the highest quality materials, able to withstand the temperatures produced.By following the installation instructions in the manual exactly, you will increase your chances of a damage free finish.While every precaution is taken in providing the recommendations on preparation and finish, given the variations in paint quality, with temperature limits and workmanship inapplication, Regency is unable to guarantee the life of the joint compounds, paint or any other finish materials or workmanship applied to or used in any application surroundingthe fireplace. This includes framing as well as finishing.Over time natural convection from any fireplace can cause discoloration in the area directly above the appliance. Lower quality paints, under-prepared finishes, poor applications,and any framing discrepancies or in the installation can cause this discoloration process to be expedited.Discoloration is not the responsibility of Regency Fireplace Products. This is outwith the control of Regency Fireplace Products Ltd., therefore not covered under any part of thewarranty policy.While discoloration is not the responsibility of Regency Fireplace Products, we believe careful attention to the recommendations provided here will result in an aestheticallypleasing result free of issues outlined above.