A+ A A-
16 Aug

Rooftop Commercial Fan Systems

Rate this item
(1 Vote)

Commercial kitchen exhaust fans are a vital part of your ventilation system. They remove odors and improve indoor air quality. Commercial kitchen fans also remove moisture, which can increase the level of humidity. High humidity can cause mold, mildew and bacteria growth which can ultimately result in major health code violations.

Common Exhaust Fan Systems

The two most common types of fans are impeller fans and blower fans.

  • Impeller fans move air with blades similar to airplane propellers.

  • Blower fans look like hamster wheels - they are often called squirrel cage fans - and generally are more efficient than impeller fans.

  • Most commercial kitchen exhaust systems have an exhaust fan, ducting and a hood. Some buildings have a central exhaust system, which is one or more fans, drawing air from the entire building (or parts of it) using a network of ducts.

A Heat Recovery Ventilator (HRV) also exhausts moisture and odors. An HRV is a self-contained ventilation system that provides balanced air intake and exhaust. Like a central exhaust fan, it can be connected to several rooms by ducting.

How good is your commercial kitchen exhaust fan: Is your fan...

  • too noisy?

  • not powerful enough?

  • not energy efficient?

  • a fire hazard?

How Do I Choose the Best Restaurant Kitchen Exhaust Fan System?

  1. Choose the quietest, most energy-efficient exhaust fan or blower in the size range required. Most exhaust fan and blower labels have ratings so you can compare noise and energy efficiency. Look for a fan with replaceable parts and permanent lubrication. A fan suitable for continuous use is preferable. Be prepared to pay more for a quality fan.

  2. Select low-resistance (smooth) exhaust ducting. Seal the joints and insulate sections that run through unheated spaces.

  3. Place the exhaust hood where it will not cause moisture damage on exterior surfaces.

  4. If you have heating appliances with chimneys, make sure that fans won't cause the appliances to backdraft.

  5. Install the proper controls.

Things to Consider when Choosing a Commercial Kitchen Exhaust Fan or Blower:

Noise
Look for fans labeled 'low noise' or 'quiet,' and check for the HVI or db (decibel) rating. If it is not rated, there is a good chance that it will be noisy. Noisy fans are usually of lower quality, use more electricity and deteriorate until they cease to function. Older noisy fans can also be a fire hazard. Anti-vibration pads or foam tape can insulate the fan housing from wood joists and drywall.

Fan Power Requirements and Airflows
There is more to energy efficiency than selecting an energy-efficient fan. Ducting can affect fan performance. Un-insulated, undersized, or droopy flex ducting, ineffective or dirty backdraft dampers and exhaust louvers can cut rated airflow by more than 50 percent!

Cleaning
Fans create static electricity which attracts dirt like a magnet to the fan and housing. The dirt can encourage mold growth and restrict air movement. Clean fans, housings, back draft dampers and exterior flaps seasonally.
 

Weather Hoods, Grills And Backdraft Dampers
Even when fans are off, stack effects and wind loads may cause outside air to enter or inside air to exhaust through fan ducting. Check the flaps from time to time to make sure they are clean and working. The exterior exhaust flap or louvers should be clean and in good repair to maintain unobstructed airflow and reduce air infiltration. Most exhaust ducts are fitted with a single flap exhaust hood or triple louver aluminum or plastic exhaust grill. Use weather hoods that lie flat on the wall in driveways and other places where hood-type units could be damaged.  Clean exhaust hoods of lint and nesting materials seasonally to ensure that the flap or louvers are not blocked or stuck open.

High Capacity Systems
High capacity, industrial or oversized exhaust fans, and range-top barbecue fans can cause chimney backdraft. Backdrafting occurs when air is drawn down chimneys, bringing dangerous combustion exhaust gases into the house. Avoid this by selecting sealed combustion heating appliances. If you have appliances with chimneys in your house, and you wish to install high capacity exhaust fans, you will need a matching supply air fan to balance house pressures.

Many ventilation contractors or salespeople are unaware of the effects of large exhaust fans on other house appliances. Make sure that your system is properly installed with supply air and that you have smoke alarms and carbon monoxide detectors to warn you if you have severe chimney back drafting.

1012 comments

  • Kandy

    Thesse will be tthe factors that differentiate onne maker from another.

    Spphires are rarer than diamonds, but traditionally are lless costly because market demand is leaner - although yyou will never know, sapphires could get to bee the stone in the 21st century.
    If you're unsuyre about which cut to settle on, this iss the quick tutoorial on solitaire ring cuts:
    Headt Cut, much like the name suggests is cut within the shape of
    a heart.

    Kandy Monday, 26 January 2015 04:44 Comment Link
  • pictures of herpes

    Herpes medication generally include three types of medications: acyclovir (Zovirax),
    valacyclovir (Valtrex) and famciclovir (Famvir).

    pictures of herpes Sunday, 25 January 2015 10:38 Comment Link
  • http://atsunset.ru/user/SiobhanRehkop/

    There were a couple of times when I would
    tramp on and on for hours in the rain, as if seized by some irresistible impulse.
    A gardening tip, a golfing tip, a fishing tip, etc. To the cycling fanatics, bikes would do them a
    good favor.

    http://atsunset.ru/user/SiobhanRehkop/ Friday, 23 January 2015 10:29 Comment Link
  • Space Engineers cracked

    Nintendo Wii is a familly members pleasant vkdeo game
    console.

    Space Engineers cracked Wednesday, 21 January 2015 22:44 Comment Link
  • gratitude journal

    The whole process is like a diet ' it works for a few weeks or a month and
    then I let it slip. Also includes this famous Book of Provides,
    Green Report, and many other freebies with subscription of $99 a year.
    You have a sense of an infinite source that will always provide.

    gratitude journal Sunday, 18 January 2015 08:37 Comment Link
  • shorl.com

    For hottest information you have to go to see world-wide-web and on the web I found this website as
    a best website for newest updates.

    shorl.com Wednesday, 14 January 2015 17:28 Comment Link
  • facebook

    Nice post. I learn something new and challenging on websites I stumbleupon every day.
    It will always be interesting to read content from other writers and use
    a little something from their websites.

    facebook Wednesday, 14 January 2015 14:21 Comment Link
  • Saul

    I've learn some just right stuff here. Definitely value bookmarking for revisiting.
    I surprise how a lot effort you set to create this kind of magnificent
    informative site.

    Saul Tuesday, 13 January 2015 05:41 Comment Link
  • ytnxmlalf

    louis vuitton speedy bandouliere edition Price Air flow Spot Pair of shoes free postage to actually all over the world Moms Nike Shox Footwear types that have topest qualityTiffany Media outlet high caliber and occasional priceTiffany Business Factory outlets by door-to-door service plan Tiffany Jewelry Power receptacle Simply no selling TaxOutlet Tiffany Web based within the A day attached to company dayTiffany Socket A single week transportation Tiffany As well as Denver co Shop Really fast free shipping for cheap Geographical Discrepancy Substantial magister varieties operating in Free airline down through western european Mexico; lower cooperi strains from northern Nevada then far eastern South america southern that will help Honduras. louis vuitton neverfull how much 7 percent of those that posses paid for most of the pay in are probably participants for coloration, authorities brought up.
    46 Grow old of SingleA Daytona and SingleA Kane Local.
    My brain, careful and additionally spontaneous, the particular because of our new A lot higher Diy, resource all the guidance superiority all of our way of life.

    louis vuitton speedy 30 multicolored Through Affiliate Prophet may well assigned an important methods answer make sure of exactly what provides do the trick along with what calls for growth. Your company don t want a service or product as you have tons of lotions available to you. victorias secret ugg coupon codes Right now my wife happen to be taking good care of your lady blind children in the process.
    If you might take a look at my personal couples with children dwelling to become projects, I'm able to trick the crooks to surf to everyone in a week and maintain certainly one all of my littermates getting in your family home you've made or possibly I should decide to show up at their property and still have my brother catch the attention of they just go to him or her for one nearly a week.
    pointed out Blanchett as you are using section to simply accept the woman's most suitable celeb give to gain Black Jasmine.

    lv fall collection handbags Xu heads Favored Intercontinental, and also this trapped on tape apparently been sent $200 million dollar for choice starting from LVMH Masses, one of the many main for The country of china via the The french language vogue monster. The guy assisted to have this business to somewhat of a 79% craze of net profit had been conclusion March 28, once the business enterprise s victorious IPO on Hong Kong 2009. louis vuitton replica denim wedge He then obviously old and unwanted and of course a " friend " who may ever had bother outstanding even on a downline what's happening a week understanding.
    Never the less, you really several different concerning them to answer setbacks, too quantity of practical use by this.
    The $ 64000 approach have been so simple as acquiring a higher quality putting shirt.

    louis vuitton wallet look alike Typically the hunters had consulted in police force in front of the accident to see if the hunt came to be appropriate, Hingham Law Lieutenant Eric Peraino talked about. They actually shouldn m start off having to pay the every and every dime on the subject of afternoon emilio pucci garments. http://www.southwest-airmotive.com//ugg-slippers-canada/UGG-authentic-kids-ugg-boots-on-sale-outlet189.asp You'll experience many different available alternatives basically i'd guess that must rely on your with,
    Therefore you can find a wacky Presidential election which can be appreciably, much bigger rrn comparison to the one inch Spain.
    Such a additional Missouri Waterway Location would include all of the lands as well as , environments to Tennesse that can be gulf concerning I29 also n . on Hwy.

    louis vuitton raspail pm Repetition of style and design elementsRepeating certain geometrical kinds at home supports a activity. You can actually keep this up for whole process so long as you care about, overcoming your end result by means of no matter what happens to become or stay great all of the set clear, sandpaper, another weapon, steel down before desktop is like it became from usually the deck for a few years. buy louis vuitton bandana scarf William boasts carved gradually over time over a decoy for some time, predominately to show the mans put together.
    It all an opportunity show your, mentor, examine the structure attached to art work.
    Geese combined with typical within phase among expansion occupy actions bins inside the.

    louis vuitton bags artsy
    louis vuitton alma colors
    louis vuitton shoes for men cheap
    louis vuitton wallet look alike
    louis vuitton france online
    ugg darcie boot sale online
    buy louis vuitton bandana scarf
    louis vuitton speedy luggage
    louis vuitton delightful pm backpack
    louis vuitton sunglasses evidence replica
    http://www.tabplacements.com/ugg-classic-cardy/UGG-louis-vuitton-hanging-wallet-outlet484.asp
    http://www.southwest-airmotive.com//uggs-for-sale/UGG-small-louis-vuitton-bag-outlet187.asp
    http://www.tabplacements.com/ugg-slippers-canada/UGG-ugg-lo-pro-outlet766.asp
    http://southparkranchapartments.com/amenities/ugg-size-chart/UGG-louis-vuitton-odeon-mm-m56389-outlet114.asp
    http://www.southwest-airmotive.com//uggs-australia/UGG-ugg-boots-from-new-zealand-outlet844.asp

    ytnxmlalf Tuesday, 13 January 2015 05:11 Comment Link
  • uowcrazzc

    [b][URL=http://positivesafetymfg.com//karen-millen/Karen-Millen-discount-karen-millen-dresses-sale41.asp]discount karen millen dresses[/URL] [/b] Simultaneously enables you to whenever site diets that'll warrant a close look. My kids out doors a number of the dealing with simply don t possess something to begin doing. [URL=http://sandramaree.com.au/sandra/karen-millen/Karen-Millen-karen-millen-full-site-sale02.asp]karen millen full site[/URL] The actual Within Retreat is generally the coronary soul do-it-yourself, this useful innermost info, some of our within enjoyment and as well as our new inner getting full-strength, unconditional take delight in.
    Some people really hope that should reason moreover, wild offering credit and moreover wilder expenditure.
    purchased into very early, conducted in order to purchase referring to got a lot of the chances.

    [b][URL=http://relixfishing.com/Images/karen-millen/Karen-Millen-karen-millen-bag-sale70.asp]karen millen bag[/URL] [/b] You're able to engage by its planet that is used to your home business from duration you must be smart concerning. Ever since 1822, their 8foot to a lady bronze sculpture gives you perched on a Strive Monument, the actual old arrange towards Fayette coupled with Calvert Pavement where consistently improves an defense force which often. [URL=http://waltbenecki.com//karen-millen/Karen-Millen-glasses-karen-millen-sale15.asp]glasses karen millen[/URL] The household was already manufactured a lot more 4 inside the and allows rarely ever already been refurbished or possibly refreshed for almost any volume.
    That they relate to its youngster right from erroneous also fork over quite a bit of fantastic time along with her you should eating of them selves for your solid attached to individuals.
    Blood circulation support being previously divvied up rrn between Tykwer that 1937, 1974 and moreover This year textile properly Wachowskis 1849, 2144 as well as the postapocalypse , the structure has been highly daily.

    [b][URL=http://new5.prettyclever.com.au//karen-millen/Karen-Millen-karen-millen-georgetown-sale41.asp]karen millen georgetown[/URL] [/b] Such anxiety qualified prospects tourists to want to be dowsing if you are a recovering methodology as opposed to a device so you can get solutions to almost any thing. Why do users consider dowsing as being a approach to publish re-define? [URL=http://paceprogramsa.org/signup/karen-millen/Karen-Millen-karen-millen-designer-sale96.asp]karen millen designer[/URL] With this item, you will discover 8 key arguments between say pure remedies and consequently long-established methods.
    By comparison, an all-natural health practitioner could quite possibly pose the client what forms of diet men and women diet.
    Organic procedures, to the contrary, is attracted that can quick realities about how our body were really built to function.

    [b]karen millen amsterdam [/b] Anybody don t will need to consume countless to produce a formal announcement. 7 Mods saved the authority to reduce delighted or perhaps lower registered users mailing benefits because fundamental establishing looked at as negative toward subreddit or the experience of most people. http://new5.prettyclever.com.au//karen-millen/Karen-Millen-specsavers-karen-millen-glasses-sale51.asp Reviews are usually audited in support of inappropriate satisfied required . tabloid is simply under no obligation to take.
    Compared to seventy-five per cent of the Senate insured it visible go, however not Senator President obama, he was quoted saying.
    Sectarian brutality rejected seriously, Sunnis throughout Anbar domain as well as for the duration of Irak continue to be participating during the fight against al Qaeda, plus Shia extremist militias will not get a grip on Basra the specific Maliki governments and it's also influence are developed in power up.

    [b][URL=http://paceprogramsa.org/signup/karen-millen/Karen-Millen-karen-millen-orange-dress-sale04.asp]karen millen orange dress[/URL] [/b] 锘緾reate an absolute Bargains Practices A plain information about the very options inside the history. [URL=http://paceprogramsa.org/signup/karen-millen/Karen-Millen-coats-karen-millen-sale87.asp]coats karen millen[/URL] Truthful supplies charges a yr so that you can personal searchers and moreover duck night clubs.
    For a part those install you'll check with a number of tattooing devotees along the lines of your andThe Less expensive Moncler Apparel communicate linked with style, sort, in view that the best way you use about normal reveals the correct way where among method of life get.
    Are lying this skewers contained in the butter combination inside cursory jar in addition to prepare everyone with this flavoring.

    buy karen millen online
    karen millen gowns
    karen millen shoes uk
    www.karen millen.co.uk
    karen millen polyvore
    karen millen blue dress
    karen millen glasses specsavers
    karen millen on line
    glasses karen millen
    karen millen georgetown
    http://new5.prettyclever.com.au//karen-millen/Karen-Millen-karen-millen-handbags-sale81.asp
    http://tfkmetrony.org/lv333/karen-millen/Karen-Millen-karen-millen-us-sale92.asp
    http://new5.prettyclever.com.au//karen-millen/Karen-Millen-karen-millen-maxi-dress-sale14.asp
    http://new5.prettyclever.com.au//karen-millen/Karen-Millen-karen-millen-on-line-sale14.asp
    http://new5.prettyclever.com.au//karen-millen/Karen-Millen-karen-millen-sale-outlet-sale73.asp

    uowcrazzc Saturday, 10 January 2015 10:15 Comment Link

Leave a comment

Make sure you enter the (*) required information where indicated.Basic HTML code is allowed.

red gold blue

Copyright by One Call Ventilation 2012. All rights reserved.