Dryer Vent Code information NFPA 211 & NFPA 54
Type 1 clothes dryer installation- – Residential-family style
- Exhaust should not be connected to or vent into any type of chimney, gas vent, crawl space, attic or concealed area, must be independent and vent to the outside. Must be insulated if going into non heated area, crawl space or attic.
- Shall be constructed of 4in, rigid metal 0.016in/28-gauge thick minimum, in walls and ceilings. Max length 35ft (NFPA) minus 5 ft for every elbow and 2 ½ for a 45 deg. Transition duct is not included in totals
- Transition duct, no longer than 8ft, UL2158 material and of metal material.
- Vent pipe should be supported every 4 ft with straps. No screws.
- Vent hoods should be 12 inches from the ground and opening, door/window.
Testing equipment we use:
Vane Anemometer: Airflow test, 8 meters per second or 1500 ft per minute or higher.
Magnehelic Gauge: Pressure test, less than 0.6 inches water Column pressure
This ensures that we are getting the proper amount of airflow to properly exhaust the air from the dryer. The better the airflow, the more lint gets extracted from the line.
Dryers in mobiles homes must be mounted to the floors, also cannot be vented to the underneath.
Ladders: (4:1 ratio) every 4ft up, you pull the ladder out 1ft. so a 20ft ladder will be out 5ft.
Histoplasmosis: disease from bird dung.
Smoke detectors: ionization & Photoelectric / Fire Extinguisher-ABC type
Do you need dryer vent cleaning, chimney cleaning or air duct cleaning service? Contact us if you have questions or book a service appointment online.