To infill a 7' x 10' exterior wall opening in an existing manufactured home due to the pop-out expansion module being removed per the engineers evaluation letter. The replacement infill wall opening shall be constructed the same as the existing wall framing and the approved engineers evaluation letter. The Building Official has determined carbon monoxide poisoning, smoke and fire related hazards to be specific hazards associated with buildings and/or structures without smoke and carbon monoxide detection and alarm systems that do not meet current building codes. Carbon monoxide poisoning, smoke and fire related hazards are substantial hazards because the likelihood of death and or injury from said hazards increases in buildings and/or structures. The existing portions of buildings or structures with non-existent or inadequate smoke and carbon monoxide detection and alarm systems that do not meet current building codes must be retrofitted to meet current code requirements. **SRZ**