QuietCool QC CL-4700 Original Classic Fan Model

(5 customer reviews)


Product details

Brand Quietcool
Power Source Corded Electric
Style CL-4700
Controller Type Button Control
Product Dimensions 21.8″D x 39.3″W x 35.7″H
Noise Level 50 dB

  • The Quiet Cool Classic Line features our patented, self‐contained duct system that hangs in the attic to help neutralize the sound and noise vibration heard in the home.
  • The included damper system features barometric pressurized gravity dampers that insure there will be no heat/cooling loss between the home and attic
  • All Quiet Cool Classic Line fans include our standard efficiency permanent split capacitor motors. These motors offer above‐average efficiency with enormous value.
  • 4505 Cfm
  • Covers up to 2250 Square Feet
SKU: B00JC5M138


The Original Classic line of Quiet Cool Advanced Whole House Fans was the first line of Quiet Cool that was introduced in 2003. The Original Classic line offers the best initial value in the Classic Series.

From the manufacturer

Whole house fan benefits

QuietCool Classic whole house fan product features

How QuietCool whole house fan works

Quiet operation

What the experts say

Additional information

Weight 64 kg
Dimensions 39.3 × 21.8 × 35.7 cm
Product Dimensions

39.3 x 21.8 x 35.7 inches; 64 Pounds

Item model number

QC CL-4700

Date First Available

March 29 2014





5 reviews for QuietCool QC CL-4700 Original Classic Fan Model

  1. David R. Voth

    A financial no-brainer where I live due to high energy costs, reliably cool nightsClimate and Economic ConsiderationsI live in San Diego, California within eyesight of the Pacific Ocean. The night air here is a comfortable temperature even on the hottest days, only rarely staying muggy through the night. Our electric power costs are outrageous: I pay 27 cents per KWh for the first 334 KWh, then the costs jumps to 48 cents. Beyond 1,080 KWh in a given billing cycle, the rate increases to 55 cents.My electric bill for 7/1- 8/8 this year showed 610 KWh of usage with a cost of $233.86, by far the highest I have had to pay since I had 2.5 KW worth of rooftop solar panels installed in 2010. At 2:00 AM the day after I received that bill, it was 84 degrees in most of my house while two small window A/C units were struggling to keep sleeping areas tolerable. Outside, it was about 75 degrees. At that moment I decided to take a serious look at whole-house fans. I did the math, and in under an hour I determined that the QuietCool CL-3100 was the right size for my house and would probably pay for itself in two years or less! My sleep-deprived, heat-addled brain was stunned by this revelation at 3:00 AM. I finally got some sleep, and by 8:00 AM I ordered the system after drinking my daily coffee and reviewing the numbers.This type of system definitely makes sense in coastal Southern California. It might not be as good a fit for a climate that has hot, humid nights and less expensive power. As an example I looked at Houston, TX and was shocked to see that people typically pay between about 7 and 12 cents per KWh. I’ve spent enough time there to know that the summer night air is often uncomfortably hot. I do not believe that a whole-house fan would be as beneficial there as it is in San Diego, though it might be useful during spring and fall months.InstallationThis fan system is well-made, easy for a handy person (like me) to install, and moves a lot of air. Rated at 320 watts (on the high speed setting) it uses a fraction of the power of two small window air conditioners I have been using for several years, which are rated at 520 watts each. I haven’t done the permanent wiring yet, but the mechanical installation took me just four hours without assistance from cracking open the manual to having a running fan system in my attic. I expect to spend a total of about 3-4 hours installing the proper wiring, including drywall repair and paint. I plan to tap into an existing circuit as the power source.I considered knocking off one-half star for the manufacturer not including some items that are essential for a proper installation of this system, specifically a single-pole, double-throw switch, a countdown timer, a length of armored cable, and a second metal handy box and cable clamps that a typical installation will require. OTOH one size would not fit all situations. Some might prefer to install the fan on a 20-amp circuit, so the switch rating, cable gauge and length, etc. are not predictable. Therefore this fan gets the full five stars.THE DOCUMENTATION THAT COMES WITH THIS FAN IS VERY GOOD. IT IS AVAILABLE ONLINE FOR FREE. READ IT AND WATCH THE MANUFACTURER’S VIDEOS BEFORE YOU BUY AND AGAIN BEFORE YOU BEGIN INSTALLATION!!!My wiring project took longer than expected because I had to get into a difficult area of my attic and drill a hole in a top plate, but it came out fine and I didn’t burn down my house or get electrocuted.Factors to consider – Think carefully and do the math!Anyone who is contemplating this type of fan should carefully consider the applicability of a whole-house fan to your specific situation:- Is the night air after a hot day sufficiently cool to make you comfortable if you pull it into your living space?- How much per month are you spending on air conditioning?- How many nights per year would a whole-house fan work as well as or better than your A/C, and what is the expected cost savings of running the fan instead of A/C?- Does your attic have sufficient out-flow ventilation such as gable vents, turrets, etc.? If not, you should take into consideration the cost of upgrading your ventilation. A whole-house fan cannot operate efficiently without adequate attic ventilation. The information for determining this is available on QuietCool’s Web site.- How big is your house (square feet of living space?) This is important in deciding which model of fan to buy.- Are you capable of doing the mechanical installation yourself, or with a helpful friend, or will you need to hire someone? The fan with including ducting is rather heavy and unwieldy. Lifting it into the attic was the only part of my installation where an assistant would have been very helpful. (I’m 60 years old and have to admit that this installation would have been a lot easier 20 years ago.)- Are you proficient at electrical wiring? If not, prepare to enlist the services of a kind friend or a professional. (I happen to be very comfortable with it, and have re-wired most of my house.)In summary, buying and installing a QuietCool fan was such an obviously beneficial decision given my locale and the construction of my house. My only regret is not having done it several years ago. It works exactly as advertised, and is much quieter than some less expensive systems I have seen in other peoples’ homes. The noise level is quite tolerable for me on the high speed setting. I am looking forward to finishing the wiring, and trying the low speed and automatic shutoff.Read the manual and do your homework before you buy!***** Technical Note added after completing the wiring *****The video on wiring a 2-speed fan with an electronic timer has a couple of continuity problems (ha ha.) It does not explicitly say to, nor does it show, including the white wire or the green wire from the timer when connecting the whites (neutrals) and green/bare wires (grounds.) Anyone who has ever wired anything SHOULD know to do that, and if you don’t you probably shouldn’t take on this wiring project. If you follow the video exactly, you will end up with a stray white wire and a stray green wire. That’s bad. The DIAGRAM in the manual is correct.***** Follow-Up Note added 7/27/2019 *****I wish to thank Lucky Dog for his thoughtful comment. I agree that it may make sense to have more than one fan, depending on the layout of your home, whether you need to keep interior doors closed, etc.After nearly a year in service, I am still very pleased with the QuietCool fan’s performance and quality. I have no regrets at all. (However, I do wish I had purchased about one more KW worth of solar panels when I did that project.) My Tier 1 electric rate has increased from 27 cents/KWh to 28.8, so everything I can do to reduce power consumption pays off. I have had no problems at all with the system.After reviewing some of the negative comments posted in the last year I believe there are two common threads:1. Some dissatisfied people appear to have purchased fans too small for their homes, and2. I suspect that some of them don’t have enough outflow capacity for their attics.I reiterate my recommendations to fully analyze your situation and carefully read the documentation before making this purchase.

  2. Mary

    Nice fan. Easy DIY installNice fan. Is quite and will suck in that outside air. Definitely buy a bigger size then you expect. SQFT X 2 for calculating CFM is a minimum number you should shoot for.In total install was very quick. Wish it came with a timer switch for the cost but ended up getting a nice one off Amazon for $15. I prewired everything the week before so when it Arrived all I had to do was cut and hole and drop it in.Only issue I had was getting the ductwork re attached to the unit on the intake side. Circle + Oval + hot attic = nightmare. Do not unattached on that end if possible.Other end that attaches to the fan was very easy to get on and off.Was it worth $1,300? Seems a bit overpriced IMO. Doesn’t even come with the switch you need to make it work. I would expect that at this price point. everything was high quality. Will it save me money? Cost me about 0.10 cents an hour to run it. A/C cost me 0.52 cents. Would have to run it a lot to break even. That doesn’t even include if you had to pay someone to install it. Maybe after 4+ years?I will say though that we can make the house much cooler then the AC can. Something about air blowing in from outside being much more refreshing then AC air.If you have extra money it’s nice but don’t get it if your justification is saving money. A few window fans can get you the same results for a fraction of the price if you are looking to save money.

  3. Vincent

    Huge help in the Spring and FallI purchased the QuietCool CL7000 for a 2,000 sq ft home. Was looking for a way to reduce my AC use in the spring and fall in CT. The install was fairly straight forward and the YouTube videos helped with the wiring instructions as I added the wireless switch. On high, this fan can surely suck air through the house! If you open the windows slightly, the air pressure coming in is intense. In an hour, the whole house can drop 5 or more degrees easily. My only negative and it’s not a deal breaker is the noise on high. Whatever room the fan is over in the attic will be fairly noisy. Again, not a deal breaker, but it’s not as quiet as the name refers to. Overall I am happy and would absolutely recommend for those who are looking to reduce AC use on nights where the temp drops.

  4. Longkilt

    Box not damaged in anyway but contents areI received the large box with the CL-4700. It was shipped from the US so it took a while to get here. Today I opened the box with the intention of spending the day installing it… unfortunately the frame that contains the dampers is badly bent on two side. Paint is missing even though there was nothing but cardboard that could rub against it; this tells me that it was boxed up like this. Not impressed as I can’t simply go to home depot and exchange it. I will try and straighten it out but for the money I spent on this I shouldn’t have to work with damaged goods. Not impressed Quietcool!

  5. Kirsten Mawle

    cool houseit really works!

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