I manage a building and we want to have all the dryers to vent through the roof. The roof is about 12 feet up from where the dryer vent enters the wall adjacent to the dryer itself. The vent would go straight up and may have an elbow or two on the way. My question is: do we need a blower motor to to move the air along? At what length do you recommend that we add a blower motor to the vent kit?
Answer Hello Nick. I'm afraid your not going to like my answer. You see, the dryer is evaporating the moisture from the wet clothes and carrying it out the vent. Thinking logically, when you put hot, moist air into a cold (room temperature) duct, The inside of the duct will sweat. In other words, the moisture will condensate on the walls of the duct. The problem with this goes back to the duct going straight up. Gravity will pull the moisture condensation back down and every time a dryer is used, the tenant on the ground floor will complain that their dryer is leaking water.That being said, the manufacturer recommends an auxiliary fan after the duct reaches in excess of a 25 foot equivalent. Equivalent meaning: each 90° turn is equivalent to 6 feet of straight ducting. A 45° turn is equivalent to 3 feet of straight ducting. This is how the design engineers explain it. So if you had two 90° elbows and a 10 foot run it would be the equivalent to 22 feet of straight duct. I really do hope I haven't confused you and I hope this information enables you to get your job done effectively. Have a great day!
The duct is 5 ft long, is there a longer one or a coupling kit to join two ducts??
Is the duct metallic?
Answer Hello Edward. Yes, TJ74X25UL is a 4" X 25 foot dryer vent hose. You can cut it to the length you will need. Hope this helps.