Yes, unvented wall heaters may be installed in accordance with the manufacturers installation instructions, the terms of their listing requirements, and the strict requirements of 2024 UMC section 915.3.1.1 Unvented Room Heaters, and its noted exceptions. Wall heaters shall not be installed in or attached to walls of combustible material unless listed for such installation. Combustion air shall be provided in accordance with Section 701.4.