Bard WH421 Installation Instructions Manual

Also see for WH421: Specifications Installation instructions

Manual 2100-399Page 8FIGURE 3MOUNTING INSTRUCTIONSFIGURE 3AELECTRIC HEAT CLEARANCESide section view of supply airduct for wall mounted unitshowing 1/4 inch clearance tocombustible surfaces.MIS-277MIS-796NOTE: It is recommended that a bead of siliconecaulking be placed behind the side mounting flangesand under the top flashing at the time of installation.WARNING• A minimum of 1/4 inch clearance must bemaintained between the supply air duct andcombustible materials. This is required forthe first 3 feet of ducting.• It is important to insure that the 1/4 inchminimum spacing is maintained at all points.• Failure to do this could result in overheatingthe combustible material and may result infire.