Drying apparatus for use in heating, ventilation systems, air conditioning systems and refrigeration systems; Accessories for fireplaces, namely, air circulation kits consisting primarily of metal ducts and metal adaptors used to increase the amount of heat recovered from the fireplace using a blower or natural convection; Fireplace louvers, blowers, and dampers, and ash pans for fireplaces; Ventilating louvers; Gas regulators; Air impellers for ventilation; Ventilating exhaust fans; Dampers,...