Dryer

DRYER CMC 504

General

• Design, construction, and workmanship shall comply with accepted engineering practices and shall be of such character as to secure the results sought to be obtained by this code. CMC 309
• No screws in ducts CMC 504.4
• Backdraft damper required CMC 504.4
• No screen at duct termination CMC 504.4
• 4” duct min (Ductless dryer ok) CMC 504.4.2
• Smooth duct with ≤ 6’ of exposed flex duct (listed) CMC 504.4.2
• Dryer exhaust duct power ventilators CMC 504.4.2.3
• Duct length per the manufacturer’s instructions CMC 504.4.2.1
• Duct term 3’ from opening or property line CMC 502.2.1
• Not connected to gas vent or chimney CMC 504.4
• ≥ 100 sq in opening for makeup air with a dryer located in a closet CMC 504.4.1
• Dryers in garages must be 18” above the floor CMC 305.1

Gas

• Gas test after S/R (gas line drawing) CPC 1213.3
• Gas shut-off at appliance upstream from flex CPC 1212.5 
• EQ valve with gas line change. BO
• Cap unused gas lines CPC 1206.3