Who is responsible for the dryer vent in a rental, condo or apartment building?

Updated · KeystoneProGuide editorial team

Who is responsible for the dryer vent?

It depends on where the building is and who owns the part of the vent in question. In Philadelphia the answer is written down: the city's Property Maintenance Code puts the duty on the owner of the structure. For the rest of Pennsylvania, no state source read for this guide assigns the job to anyone, which leaves it to local ordinances and to the lease or the condominium documents.

This matters to a great many households. The Census Bureau estimates that 30.7 percent of occupied homes in Pennsylvania are rented, and 48.2 percent in Philadelphia.

What does Philadelphia's code say?

Four provisions of the Philadelphia Property Maintenance Code bear on a dryer vent.

Read together, these place the upkeep of a building's dryer exhaust on the owner of the structure. They do not say who pays whom under a lease. The code as published online carries a notice that it may not reflect the most recent legislation. For questions, the city's contractor and licensing pages point residents to 311.

What about the rest of Pennsylvania?

The state sources go quiet. Pennsylvania's Uniform Construction Code says how a dryer vent must be built when it is installed or altered. The regulation that lists the codes it adopts does not include a property maintenance code, so the statewide code read for this guide has nothing to say about who keeps an existing vent clean.

A municipality may have a maintenance code of its own. Whether yours does is a question for the township, borough or city code office. Short of that, the lease or the condominium documents decide, and it is worth reading them for the words dryer, vent, appliance and exhaust before a problem arises.

What is different about a shared system?

In a house, one dryer has one duct. A larger building may collect several dryers into a common system, and the International Mechanical Code, which Pennsylvania adopts, has rules for that. Where a common multistory duct system carries the exhaust of multiple clothes dryers, it requires, among other things:

  • rigid metal ductwork inside a fire-resistance-rated shaft, with no offsets and no dampers;
  • an exhaust fan that runs continuously, is connected to standby power, and is monitored so that an audible or visual signal shows when it stops;
  • a cleanout opening at the base of the shaft, at least 12 inches by 12 inches, to allow cleaning and inspection;
  • no screen at the termination;
  • a system that serves only clothes dryers.

The same code says each vertical riser in a dryer exhaust must have a means for cleanout.

Two things follow for residents. A shared shaft is building equipment, with a fan and an alarm, and looking after it is not something one household can do. And a system built this way has a place where it is meant to be opened and cleaned. Massachusetts fire officials make the general point: commercial dryers should be cleaned out regularly because of their frequent use and shared venting system.

Outside a designed common system, the rule is the opposite. The residential code says a dryer exhaust system shall be independent of all other systems. Two dryers joined into one ordinary duct, or a dryer tied into a bathroom fan duct, does not meet that rule.

Does contractor registration apply in these buildings?

Partly. Pennsylvania's home improvement registration law covers private residences, and the Attorney General's guidance says that includes single units within a multifamily building, condominiums and cooperative units among them. A contractor replacing the vent in your condo unit for more than $500 is doing home improvement work.

The same guidance exempts one group: employees of apartment buildings, condominiums and community associations who work on the property within the scope of their employment do not need to register. A building's own maintenance staff can therefore work on its vents without a registration number. An outside company hired for repair or replacement is in a different position.

What can a renter do?

  • Clean the lint filter every load. The U.S. Fire Administration says to do it every time you use the dryer. This part is yours whoever owns the machine.
  • Report signs early, in writing. Clothes taking longer to dry, a hot laundry area, a flap outside that does not open, or lint and damp around the dryer are worth a dated message to the owner or manager.
  • Report moisture. The U.S. Environmental Protection Agency's mold guide tells renters to report moisture problems immediately to the building owner, manager or superintendent. A dryer that vents into the room or the wall is a moisture problem.
  • Check the alarms. The Fire Administration says carbon monoxide alarms belong outside each sleeping area and on every level of the home. If yours are missing, say so in the same message.

What should a landlord or association do?

Put the vents on a calendar. The Fire Administration's advice is to clean dryer vent ductwork every year, and nothing in it is limited to owner-occupied houses. For a building with several dryers, that means knowing how many ducts there are, where each one ends, and when each was last cleaned.

When hiring, ask the company whether it has worked on shared risers, where the cleanouts are, and how it will show that each run is clear. Keep the receipts as a record that the equipment was maintained.

What should a condo owner find out?

Three things, before the vent needs attention.

  • Whose duct it is. The run inside your unit may be yours while the shaft or the outlet is common property. The documents should say.
  • Where it goes. Units in the middle of a building can have long runs to reach an outside wall or the roof. The residential code's specified maximum is 35 feet less an allowance for each elbow, unless the dryer manufacturer's instructions give another figure.
  • Whether you may change it. Ask the association before planning any change that touches a common wall or roof, and ask the code office about a permit.

In Philadelphia, where the Census Bureau counts 35.5 percent of housing units in multi-unit structures, these questions apply to a large share of homes. The Philadelphia guide covers the city's rules, what Pennsylvania requires covers the state's, and businesses that clean dryer vents are on the dryer vent cleaning directory page.

Sources

  1. The Philadelphia Code, Property Maintenance Code: Section PM-403 Ventilation, City of Philadelphia
  2. The Philadelphia Code, Property Maintenance Code: Chapter 6 Mechanical and Electrical Requirements, City of Philadelphia
  3. The Philadelphia Code, Property Maintenance Code: Section PM-603 Mechanical Equipment, City of Philadelphia
  4. The Philadelphia Code, Property Maintenance Code: Section PM-607 Duct Systems, City of Philadelphia
  5. 34 Pa. Code § 403.21. Uniform Construction Code., Commonwealth of Pennsylvania (Pennsylvania Code)
  6. 2021 International Mechanical Code, Chapter 5: Exhaust Systems, International Code Council
  7. 2021 International Residential Code, Chapter 15: Exhaust Systems, International Code Council
  8. Dryer Fire Safety, Massachusetts Department of Fire Services
  9. Frequently Asked Questions: Home Improvement Contractor Registration, Pennsylvania Office of Attorney General
  10. A Brief Guide to Mold, Moisture and Your Home, U.S. Environmental Protection Agency
  11. Basement and Garage Fire Safety, U.S. Fire Administration
  12. Carbon Monoxide Poisoning Prevention, U.S. Fire Administration
  13. 2020-2024 ACS 5-Year Narrative Profile: Philadelphia County, Pennsylvania, U.S. Census Bureau
  14. 2020-2024 ACS 5-Year Narrative Profile: Pennsylvania, U.S. Census Bureau
  15. Find a licensed contractor and contractor information, City of Philadelphia

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