I have started working on a project installing an exhaust fan in a small room in my home where we keep the cat litter boxes. The reason for the exhaust fan should be obvious ;-). To-date I have simply used an ac plugin timer to turn the fan on and off at pre-set intervals (I've already installed a dedicated GFCI wall outlet and created both inlet and outlet holes on the exterior walls). The fan I WAS using was a standard bathroom exhaust fan which I installed at waist height. It worked OK, but was not very energy efficient. Bear in mind that the initial smell after a cat relives itself is what I am attempting to exhaust, since this is when particulates in the air are at the most concentrated. Afterwhich, the litter does the real work. The exhaust fan also assist with keeping the air balanced, as this room also has our furnace and water heater within it.
What I would LIKE to do is to utilize a motion sensor as a means of switching the exhaust fan on and off (I would place the sensor near floor level to sense the motion of the cats as they enter and exit the room). My problem is that the motion sensors are not rated for the load of the fan, hence they do not work.
A friend suggested I utilize a relay switch which the sensor would activate, and then the switch would actuate the fan. My basic question is, is this idea sound? How do I choose the correct relay switch?
As an FYI I was planning on using a standard motion sensor typically found at any hardware store designed for use with lighting. These sensors have the additional feature of setting the length of time to remain ON, such as 5minutes, 10minutes etc.
My apologies if I provided too much 'non-electrical' content, but my experience when dealing with projects such as this are, if others understand the intent of the project, the resulting advice is often much more helpful.
TIA for any assistance you can provide. Feel free to hit me with other questions if necessary.
Sincerely,
Kevin
What I would LIKE to do is to utilize a motion sensor as a means of switching the exhaust fan on and off (I would place the sensor near floor level to sense the motion of the cats as they enter and exit the room). My problem is that the motion sensors are not rated for the load of the fan, hence they do not work.
A friend suggested I utilize a relay switch which the sensor would activate, and then the switch would actuate the fan. My basic question is, is this idea sound? How do I choose the correct relay switch?
As an FYI I was planning on using a standard motion sensor typically found at any hardware store designed for use with lighting. These sensors have the additional feature of setting the length of time to remain ON, such as 5minutes, 10minutes etc.
My apologies if I provided too much 'non-electrical' content, but my experience when dealing with projects such as this are, if others understand the intent of the project, the resulting advice is often much more helpful.
TIA for any assistance you can provide. Feel free to hit me with other questions if necessary.
Sincerely,
Kevin