Can this be installed in an existing 3" vent pipe using 4" to 3" reducers?
I only have 25 inches in attic between bath ceiling and underside of roof
The ILF120 has been designed to use 4” round duct. Using smaller 3” round duct would reduce the air flow performance of the fan . Please contact our Technical Service department at 888-336-6151 for further assistance
Date published: 2013-10-23
Is the damper strictly one way?
I plan to install two fans, one in toilet room and the other in shower room, but both share the same duct. When the toilet fan is on, the damper of the shower fan should block the backdraft (no flow to shower room), and vice versa. Some anti-backdraft dampers cannot take pressure from the other side, as they will open or leak. Is your damper one way and kind of sealed when its outlet side is under the flow pressure generated from the other fan's discharge?
Thank you for your question. The ILFK120 is designed to ventilate multiple spaces at the same time. When the fan is activated, both dampers will open and ventilate out of the home. The dampers do not operate independently. . For further assistance, contact Technical Support at 888-336-6151.
Date published: 2018-06-25
What is the sone rating on these?
In my application the power unit will be directly above the bath ceiling, above an existing large grille. Noise will be obvious...
Thank you for your question on the model ILF120 in-line exhaust fan. Since these units are remotely located and are not actually in the room itself, they do not have a sone rating. The ILF120 is a very quiet, smooth running fan and you should not have a problem with noise, even when installed directly above the bath ceiling.
Date published: 2014-09-24