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  • Aug 8, 2012, 07:54 AM
    taras1
    free electrical questions
    there are 3 questions here.

    question 1.
    I am replacing a older newtone bathroom ventilation fan with a panasonic fan same 110 cfm. My question is the old newtone fan just pluged in for installation and the new one is for hard wiring. Can a plug be put on the new panasonic fan and just plug it into the electrical box in the ceiling?

    Question 2. Am I really better with a INSULATED 4" duct in the wall or not bother with it. I have a run about 10 feet and another apartment above mine. the venting will be out the wall of the house. WILL IT BE QUIETER OR DRYER OR VENT BETTER?

    Question 3. This bathroom never vented correctly due to venting about 32 feet with curves and 4" duct 110 cfm's but can't pull 32 feet. Now I will be venting a short run about 8 to 12 feet. I finally want good venting on this new bathroom. Unfortunately I now had to vent out the front of the house due to 2x4 running the wrong way to vent out the side of the house. Anyway with a 4" duct will I have trouble with a 110 cfm for this small room that uses really hot water in the shower. The room size is 4' x 8' x 8' with no window? Will I not get enough recovery air? One store said this size is good and shouldn't really go smaller from experience or it really will not work good enough. The other store said the 110 is to large and go with 80 cfm.
    thanks for your help.
  • Aug 8, 2012, 10:55 AM
    hkstroud
    Quote:
    question 1.
    I am replacing a older newtone bathroom ventilation fan with a panasonic fan same 110 cfm. My question is the old newtone fan just pluged in for installation and the new one is for hard wiring. Can a plug be put on the new panasonic fan and just plug it into the electrical box in the ceiling?
    Assuming you mean the fan frame has has a receptacle and the fan motor wiring has plug. No advantage to changing connection, you will only be connecting it once and you will do more work modifying than connecting as it is designed. Second you are technically not permitted to modify an electrical appliance, you loose the UL rating.

    Quote:
    Question 2. Am I really better with a INSULATED 4" duct in the wall or not bother with it. I have a run about 10 feet and another apartment above mine. The venting will be out the wall of the house. WILL IT BE QUIETER OR DRYER OR VENT BETTER?
    No, the air moving in the duct makes very little if any noise. Most of the noise comes from the air moving through the grill and the fan blades.

    Quote:
    The room size is 4' x 8' x 8'
    That is 256 cubic feet. With no restrictions a 110 CFM fan will change the air in 2.3 minutes. An 80 CFM will change the air in 3.5 minutes. The faster air moves the more noise. The more important question is how much air can enter the room? You can't take any air out of the room unless you let air into the room. With the door closed, almost all of the air has to come in between the bottom of the door and the floor.

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