Velocity Fan
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 New PATTON PX306 14 High Velocity Floor Fan Air Circulator Portable Built Tough $44.99 Time Remaining: 7d 11h 59m Buy It Now for only: $44.99 |
 MAXX AIR HIGH VELOCITY SHOP FAN $50.00 (1 Bid) Time Remaining: 13h 4m |
 Vornado 630B High Velocity Fan CR1007406 $59.95 Time Remaining: 20d 23h 51m Buy It Now for only: $59.95 |
 New BIG AIR 20 Floor Fan High Velocity Portable Tilt Air Mover $49.98 Time Remaining: 27d 12h 3m Buy It Now for only: $49.98 |
 4 Desk Top High Velocity Personal Fan Steel Metal Construction $9.99 Time Remaining: 12h 26m Buy It Now for only: $9.99 |
 New PATTON PX306 14 High Velocity Floor Fan Air Circulator Portable Built Tough $63.95 Time Remaining: 21h 52m Buy It Now for only: $71.95 |
 14 HIgh Velocity Fan 3 speed All Metal $29.95 Time Remaining: 9h 35m Buy It Now for only: $29.95 |
 20 BIG AIR FLOOR FAN HIGH VELOCITY 25 X 24 X 12 TILT WE SHIP FAST $58.49 Time Remaining: 19d 4h 50m Buy It Now for only: $58.49 |
 Comfort Zone CZHV9B 9 High Velocity Table Fan Portable Room Cooling New $31.53 Time Remaining: 28d 14h 53m Buy It Now for only: $31.53 |
 4 Black Personal High Velocity Desk Fan Brand New in Box $4.85 (8 Bids) Time Remaining: 22h 23m |
 Impress 9 Chrome High Velocity 3 Speeds Floor Fan $14.99 Time Remaining: 28d 10h 45m Buy It Now for only: $14.99 |
 Westpointe 4 Mini High Velocity Personal Fan HVF4 RP BLACK 120Volt 1 Speed NEW $8.95 Time Remaining: 12d 22h 6m Buy It Now for only: $8.95 |
 Comfort Zone CZHV4 4 High Velocity Table Fan Portable Room Cooling New $20.40 Time Remaining: 28d 14h 46m Buy It Now for only: $20.40 |
 4 Blue Personal High Velocity Desk Fan Brand New in Box $4.25 (3 Bids) Time Remaining: 22h 24m |
 Vornado 630B High Velocity Fan CR1007406 $63.39 Time Remaining: 20d 20h 54m Buy It Now for only: $63.39 |
 Impress 9 Chrome High Velocity 3 Speeds Floor Fan $14.99 Time Remaining: 25d 18h Buy It Now for only: $14.99 |
 Tahoe 1680 2520 CFM High Velocity 14 Floor Fan $46.89 Time Remaining: 21d 23h 32m Buy It Now for only: $46.89 |
 Nantucket Breeze 9 inch High Velocity Fan with now lowered price for homes desk $0.99 (1 Bid) Time Remaining: 1d 1h 19m |
 NIB SALONETT 4 High Velocity Portable Mini Small Fan Model DR 403 $9.50 Time Remaining: 29d 13h 18m Buy It Now for only: $9.50 |
 Cooling Ventilation Comfort Zone CZHV18B 18 High Velocity Floor Fan New $56.67 Time Remaining: 28d 14h 40m Buy It Now for only: $56.67 |
 Lasko 3300 Wind Machine High Velocity 20 Directional Floor Fan $39.79 Time Remaining: 1d 11h 7m Buy It Now for only: $39.79 |
 2 PMX BLUE HIGH VELOCITY METAL FANS 4 INCHES NEW IN BOX $14.99 Time Remaining: 1d 10h 3m Buy It Now for only: $18.99 |
 4 Blue Desk Top High Velocity Personal Fan Steel Metal Construction $9.99 Time Remaining: 10d 16h 43m Buy It Now for only: $9.99 |
 HVF14 SP Westpointe 14 High Velocity 3 Speed Fan $26.99 Time Remaining: 28d 15h 51m Buy It Now for only: $26.99 |
 Electric Q Standard High Velocity Portable Floor Fan 14in1 8 HP 2520 CFM11402 $24.95 Time Remaining: 27d 15h 44m Buy It Now for only: $24.95 |
 Tahoe 3850 5600 CFM 1 4HP High Velocity 20 Floor Fan $69.99 Time Remaining: 20d 18h 39m Buy It Now for only: $69.99 |
 2 PMX LIGHT BLUE HIGH VELOCITY METAL FANS 4 INCHES NEW IN BOX $15.99 Time Remaining: 2d 8h 46m Buy It Now for only: $18.99 |
 Patton PUF1810A BM 18 High Velocity Fan $58.75 Time Remaining: 21d 18h 6m Buy It Now for only: $58.75 |
 Comfort Zone 8 Inch High Velocity Turbo Fan Black $34.04 Time Remaining: 21d 18h 1m Buy It Now for only: $34.04 |
 Patton 20 High Velocity Commercial Industrial Shop Fan 3 Speed Tilt Head $87.99 Time Remaining: 25d 14h 44m Buy It Now for only: $87.99 |
 2 PMX BLACK HIGH VELOCITY METAL FANS 4 INCHES NEW IN BOX $15.99 Time Remaining: 2d 10h 6m Buy It Now for only: $18.99 |
 POLAR AIRE HI VELOCITY FLOOR FAN 12 LF 12 $45.99 Time Remaining: 5d 22h 44m Buy It Now for only: $45.99 |
 Lasko 2521 16 Oscillating Pedestal Room Fan High Velocity Cooling New $38.91 Time Remaining: 23d 14h 14m Buy It Now for only: $38.91 |
 New PATTON PX306 14 High Velocity Floor Fan Air Circulator Portable Built Tough $64.95 Time Remaining: 24d 21h 25m Buy It Now for only: $64.95 |
 4 High Velocity Personal Fan $6.50 Time Remaining: 2d 11h 8m |
 HVF14 SP Westpointe 14 High Velocity 3 Speed Fan NEW $24.95 Time Remaining: 12d 22h 32m Buy It Now for only: $24.95 |
 20 INDUSTRIAL FLOOR FAN 3 SPEED ADJUSTABLE TILT HIGH VELOCITY COMMERCIAL SHOP $64.99 Time Remaining: 27d 18h 4m Buy It Now for only: $64.99 |
 Ventamatic 24 High Velocity Tilt Fan Garage Workshop Industrial Fan $183.99 Time Remaining: 11d 18h 49m Buy It Now for only: $183.99 |
 PMX RED HIGH VELOCITY METAL FAN 4 INCHES NEW IN BOX $8.99 Time Remaining: 3d 9h 49m Buy It Now for only: $10.99 |
 NEW Patton PUF1810A BM 18 High Velocity Fan $54.50 Time Remaining: 11d 16h 42m Buy It Now for only: $54.50 |
 4 Red Desk Top High Velocity Personal Fan Steel Metal Construction $9.99 Time Remaining: 18d 15h 30m Buy It Now for only: $9.99 |
 Westpointe 4 Mini High Velocity Personal Fan HVF4 RPRED 120Volt 1 Speed NEW $8.95 Time Remaining: 12d 21h 55m Buy It Now for only: $8.95 |
 New PATTON PX306 14 High Velocity Floor Fan Air Circulator Portable Built Tough $63.95 Time Remaining: 3d 22h 47m Buy It Now for only: $71.95 |
 Comfort Zone High Velocity Cradle Fan 12 inch $41.16 Time Remaining: 1h 27m Buy It Now for only: $41.16 |
 ECLIPSE POWER BREEZE 10 High Velocity Fan $15.73 Time Remaining: 13d 1h 57m Buy It Now for only: $15.73 |
 NEW Ozeri Brezza Oscillating Velocity Desk Fan FREE Shipping $60.99 Time Remaining: 27d 20h 41m Buy It Now for only: $60.99 |
 F 4092 9 high velocity fan $31.00 Time Remaining: 3d 23h 28m Buy It Now for only: $37.00 |
 Westpointe 4 Mini High Velocity Personal Fan HVF4 RPBLUE 120Volt 1 Speed NEW $8.95 Time Remaining: 12d 21h 52m Buy It Now for only: $8.95 |
 Patton 20 High Velocity Fan Large Blade Diameters Tilt head 3 speeds SHIPS FREE $61.50 Time Remaining: 13d 16h 6m Buy It Now for only: $61.50 |
 Tahoe 60801102 9100 11200 CFM 1 2HP High Velocity 36 Drum Fan $249.99 Time Remaining: 20d 18h 39m Buy It Now for only: $249.99 |
 Lasko 2265QM 20 Inch Max Performance High Velocity Floor Wall mount fan Silver $35.99 Time Remaining: 28d 16h 28m Buy It Now for only: $35.99 |
 2 PMX RED HIGH VELOCITY METAL FANS 4 INCHES NEW IN BOX $14.99 Time Remaining: 5d 9h 32m Buy It Now for only: $18.99 |
 Patton PX306 U High Velocity Floor Fan Air Circulator $59.95 Time Remaining: 18d 15h 22m Buy It Now for only: $59.95 |
 Stanley High Velocity Blower Fan 655702 $64.95 Time Remaining: 28d 15h 22m Buy It Now for only: $64.95 |
 Ragalta 16 High Velocity Turbo Floor Fan RHTF5016 $42.99 Time Remaining: 8d 10h 13m Buy It Now for only: $42.99 |
 2 PMX SILVER HIGH VELOCITY METAL FANS 4 INCHES NEW $14.99 Time Remaining: 5d 10h 28m Buy It Now for only: $18.99 |
 4 PMX High Velocity Metal Personal Desk Fan Black $14.99 Time Remaining: 12d 13h 51m Buy It Now for only: $14.99 |
 4 PMX High Velocity Metal Personal Desk Fan Blue $14.99 Time Remaining: 24d 16h 22m Buy It Now for only: $14.99 |
 NEW VENTAMATIC HVPF220SC 22 HIGH VELOCITY PEDESTAL FAN NEW IN BOX SALE 3 SPEED $94.49 Time Remaining: 22d 8h 41m Buy It Now for only: $94.49 |
 Patton 20 High Velocity Commercial Industrial Shop Fan 3 Speed Tilt Head $75.99 Time Remaining: 5d 14h 47m Buy It Now for only: $99.99 |
 Westpointe HVF14 SP 14 High Velocity 3 Speed Fan $24.99 Time Remaining: 9d 13m Buy It Now for only: $24.99 |
 Honeywell 16 HIGH VELOCITY STAND FAN MODEL HS 162 TGT $25.99 Time Remaining: 3d 1h 17m Buy It Now for only: $25.99 |
 4 PMX High Velocity Metal Personal Desk Fan Gray $14.99 Time Remaining: 12d 13h 53m Buy It Now for only: $14.99 |
 3 High Velocity Speeds Fan $72.99 Time Remaining: 5d 23h Buy It Now for only: $80.29 |
 Lasko 20 Wall Mount High Velocity Fan Mod 2250QM $74.99 Time Remaining: 21d 14h 1m Buy It Now for only: $74.99 |
 SoleusAir High Velocity Table Wall Fan 10 Dia 3 Speeds Whisper Quiet Rotating $24.95 Time Remaining: 23d 14h 22m Buy It Now for only: $24.95 |
 NEW Floor Fan with Wall Mount Bracket 20 Commercial 3 Speed High Velocity $78.77 Time Remaining: 16d 8h 35m Buy It Now for only: $78.77 |
 Honeywell 16 HIGH VELOCITY STAND FAN HS 164 TGT white $15.00 Time Remaining: 6d 12h 54m |
 New Comfort Zone CZHV12B 12 Inch High Velocity Cradle Style Floor Fan Black $47.03 Time Remaining: 25d 11h 1m Buy It Now for only: $47.03 |
 Westpointe 20 Inch 120 Volt 3 Speed Chrome High Velocity Floor Fan $49.99 Time Remaining: 17d 18h 19m Buy It Now for only: $49.99 |
 Vornado High Velocity Shop Fan Air Circulator Wall Mountable Brackets 293HD $139.98 Time Remaining: 11h 44m Buy It Now for only: $139.98 |
 Pedistal FanKing of Fans 20 High Velocity Oscillating 3 speed pull chain $80.00 Time Remaining: 5d 14h 5m |
 Westpointe HVF4 RP Personal 4 Inch High Velocity 360 Degree Adjustable Tilt Fan $8.94 Time Remaining: 6d 18h 35m Buy It Now for only: $8.94 |
 Comfort Zone 29602679 Black 18 High Velocity Oscillating Pedestal Fan with $48.97 Time Remaining: 15d 17h 38m Buy It Now for only: $48.97 |
 1002WP Westpointe 4 inch Hi Velocity Personal Fan $9.99 Time Remaining: 9d 14h Buy It Now for only: $9.99 |
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Make-up Air System - Power Tube Fan
Tenderall Fan Co. has developed a PT Power Tube Make-Up Air System - one of the most economical options for larger industrial plants ventilation air make up systems.
PT Air Make-Up fan system is a new ventilation concept. It utilizes some aerodynamic principles for supplying, tempering and distributing make-up air in a building in cold weather. It offers more efficiency, economy and comfort than most conventional make-up air units.
When exhaust fans are used to provide ventilation, both for industrial and process exhaust and personnel comfort, a negative air pressure is created within the building. This negative pressure causes several problems:
- Process exhaust systems are less efficient and may not work properly.
- Down flow can occur through gravity vents and result in the back venting of products of combustion from flues and stacks of heaters and process equipment.
- Drafts are created that are a dsicomfort to employees. Safe operating of outside doors may even be impaired.
Our Power Tube Fan Make-Up Air System solves all of these problems economically, even on the coldest winter day.
PT Fan System consists of a specially designed air supply fan, a wall housing and a motorized air inlet damper. A long polyethylene tubing is attached to the unit and extends horizontally inside building supported from wire. It has precision holes punched on both sides at specific intervals along its length and has an opposed end closed off.
Each fan housing assembly is mounted in the outside wall opening or connected to a roof air supply fan.
In the winter, conventional make-up air systems have to heat the cold outside air prior to introduction into the building. This is an expensive process in both equipment and continuing energy cost. The Power Tube Fam Make-Up Air System is a simplier system that utilizes waste3d building heat and basic earodynamic principles for supplying, tempering and distributing make-up air. And that makes it less expensive than conventional make-up air systems to purchase, to install and to operate.
When make-up air is needed, the motorized inlet shutter opens, the supply fan turns on and supplied fresh outside air inflating the tube for its full length. The air discharges from the punched holes in the tube located overhead as small high velocity jets which create turbulent mixing with the warmer inside air. As a result the outside air is effectively tempered before it reaches the worker level, creating a uniform draft free make up air system.
Normally several PT Fan systems are required for a building, depending on the size of the building, volume of make-up air required, size of PT Fan models selected. Additional heating, if required, may be furnished from conventional type space unit heaters positioned near the distributing PT tubes.
Tenderall PT Air Make-Up System has the following advantages over coventional make-up air units:
* Offers savings in initial investment and operating costs;
* Provides draft-free and uniform air distribution from along tube rather than blasting air from a single source outlet;
* Uses less energy due to lower horsepower for the same supplied air volume and because of friction loss of blowing air through a heat transfer system is completely eliminated;
* Easier and less costly to install, as PT Fan system is relatively light in weight ans the polyethylene tubing can be installed in a fraction of time normally required for conventional ventilation ducts;
* Eliminates coil freeze-up problems typical for AHU with heating hot water and steam heat exchangers;
* Reclaims overhead heat wasted in most buildings - through mixing of outside air with inside hot air;
* Very quiet, normally within 20 Fan Sones;
* Flexible in capacity, which is achieved by running only the required number of PT units based on the temperature inside the building;
* Provides a more comfortable eworking environment by maintaining gentle air flow and uniform temperature distribution.
Power Tube Make-Up Air Fans are available in Sizes 18 to 48 for for air flows up to 40,000 CFM.
PT Power Tube Make-Up Air System tube is constructed of thick woven high density polyethylene fiber(8 x 
laminated with poly coating to a thickness of 6 Mils. It is 3.8 oz. per square yeard material. Burst strength is 118 Lbs per square inch. The material is flame retardant and complied with NFPA Standard 701. Tubes are available in two colors: blue and white. One end of the polyethylen tube is factory dealed.
Sufficient make-up air should be provided to balance exhaust from general ventilation and process ventilation. Usually several Power Tube Fans will be required, located to distribute air throughout the plant. If additional tempering of make-up air in specific plant areas becomes necessary, unit heaters can be added.
Additional information can be found at the Tenderall Fan company web site http://www.tenderall.com/ahu/index.html.
Oleg Chetchel
Air Systems Engineer
Tenderall Fan Co.
http://tenderall.com/inquiry/index.html
http://tenderall.com/airhandler/index.html
About the Author
Oleg Chetchel
Ventilation Equipment Designer
Tenderall Fan Co.
http://tenderall.com