Can PVC pipe be used for air distribution ductwork?
While metal ductwork is generally fine for smaller buildings, PVC is often preferred in larger buildings, where heat and cool air need to travel farther through the ducts.
Can PVC handle hot air?
PVC material is often used to make hot air ducts that are ideal for commercial grade heat applications. They generally tend to have a high temperature range limit of 180° F. PVC hot air ducts are very affordable when compared to hoses made of other compounds.
Is it OK to run cable through ductwork?
Ductwork can have quite a lot of sharp metal edges; extra protection, such as bushings and rigid conduit, are recommended and/or required for any run of cable that passes close enough to ductwork etc for contact to be a concern.
Do you have to have drain and vent lines installed?
Before you begin, have your plans approved by an inspector and consider the following: Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. It may be possible to simplify supply runs by moving a vent pipe over a few inches.
How can I run a drain pipe through the wall?
You may need to cut a hole in the wall of the room above or below to guide the vent pipe up or the drainpipe down. In the attic you may be able to run the vent over to tie into an existing vent. If not, drill a hole in the attic ceiling and have a roofer install a roof jack for the vent pipe.
Can a vent pipe be run through a wall?
Tips for Running Pipe Through a Wall. Vent pipes may run level, though some codes may call for a slight slope toward the main drain. All drain lines must be sloped. For a precise slope, strike a level line on the studs and measure down 1/4 inch per running foot. Codes may call for fireproof caulking in walls.
Can a PVC pipe be used in a return air duct?
If it is, the IRC would apply, not the IMC. IRC does not prohibit combustibles in joist return plenums, including pvc. The wires running parallel with airflow are prohibited by NEC, but any wires perpendicular to airflow are allowed.
What do you need to know about ductwork?
The 3 Most Important Things to Understand About Residential Ductwork Designs are: •Furnaces and air conditioners require a certain amount of airflow, measured in CFM (Cubic Feet Per Minute), to be passed through the equipment (supply and return ducts) in order for the equipment to function properly and efficiently.
How does an extended plenum duct system work?
Extended plenum system Theextended plenum duct system (see Figure 2 on the next page) generally consists of one or two box- like pieces of ductwork extending from the main plenum at the indoor unit.This extended plenum has the same dimensions (height and width) from the starting collar to the end of the run.
Can a duct be a combustible construction?
The duct, plenum or concealed space can be of combustible construction. Anything not a part of the duct, plenum or concealed space and not one of the eleven exceptions shall have a flame spread index not greater than twenty-five (25) and a smoke developed index not greater than fifty. I seldom find DWV pipes but I do find a lot of condensate pumps.