Building Ventilation

Energy recovery systems have become a popular way to heat and cool homes as well as commercial buildings. Energy recovery applications typically use two fans that provide air through a heat exchanger that "treats" the air by heating or cooling it before it enters the building. Buffalo Blower's plenum and forward curved fans are typically used for energy recovery applications and offer a wide range of performance and flexibility. Generator rooms require a wide range of fans to optimize the performance of generators and other equipment. Exhaust fans are used to prevent heat buildup within the generator room, while supply fans are used to provide fresh air for combustion and efficient generator performance. Room size, space limitations, and mounting capabilities will determine the exact type of fan needed for each specific application. As a leading manufacturer of air moving equipment, Buffalo Blower offers numerous fan types for meeting any generator room specification.

Rooftop exhaust fans are designed to remove heat and odors from buildings to improve air quality and occupant comfort. Areas such as cafeterias, locker rooms, office spaces, restrooms and warehouses often have unique requirements specified by local codes and utilize a wide range of rooftop exhaust fans. To accommodate these various types of environments and ventilation systems, Twin City Fan offers a complete line of products to support every rooftop exhaust application. These applications can range from clean airstreams with minimal filtration all way to high density offices and health care facilities that must comply with extremely stringent regulations. Gravity ventilators are used to equalize a building's positive or negative pressure created by other fans in the system. These ventilators provide natural ventilation and are used for intake and relief applications. Twin City Fan offers both spun aluminum and hooded ventilators, featuring a low silhouette for low roof-lines. Louvered penthouse ventilators are available when aesthetics are not an important factor and feature extruded aluminum louvers. Sidewall exhaust and supply applications require panel fans to move large volumes of air at low static pressures. Panel fans are commonly used on the walls of warehouses and manufacturing facilities to supply outside air or to remove hot or noxious gases in exhaust configurations.

Ceiling Metal Pipe Exhaust Fan

Five exclusive features of a class a motor home

If you are looking for a Recreational Vehicle (RV) that allows you to enjoy all the comforts of home on the go yet fits your budget, used Class A motor homes are a great option. While you do get RVs that come with just the basic amenities, Class A motor homes are high-end versions that offer the sophistication and convenience that you would typically not associate with motor homes. Highly maneuverable and compact in size, despite their feature-packed interiors, these Class A vehicles are easy for you to drive over long distances, too. Take a look at five exclusive features that you can expect in your pre-owned Class A motor home.

Shower and changing room:

A reasonably spacious shower lets you clean up quickly and efficiently in your used Class A motor. However, if you are also looking for some extra space and privacy while changing, many Class A's also come with a special feature — a private changing room as an extension of the shower! Now, traveling with your family and friends is easier than ever.

Driving safety:

The exteriors of top notch Class A RVs come with some very attractive features that enhance your safety on the road. Panoramic windshield improves your field of vision while the side mirror cameras ensure that you are never taken by surprise by vehicles bearing down upon you in your blind spot. If lane changes are a challenge for you when you are driving your RV, these exclusive features eliminate these troubles for sure.

Living area:

The last thing you would expect in a compact motor home is a living area where you can chill with your partner or buddies but that's exactly what you will always find in a high-end used Class A motor home. Some of these come with compact cockpit seating, complete with a stowaway table. This living-sitting area is positioned so that it takes up minimum space within the RV.

 Bthroom window mounted exhaust fan

Exhaust Fans

Exhaust fans help to force out stale air and pull fresh, clean air through your facility for a more comfortable working environment. Belt-driven exhaust fans have durable galvanized steel blades to handle large volumes of air at low static pressures, and are available in vertical roof and horizontal mount wall configurations.

They feature variable pitches and adjustable pulleys to optimize performance. Direct-drive models are available in a wide range of sizes and airflows. These medium-performance and high-performance exhaust vent fans can be found with polypropylene propellers and fiberglass frame construction for corrosion resistance.

High quality window-mounted exhaust fan, with indicator, with Italy hot switch to control the front shutter
Installation: Wall window Mounted
Material: ABS
Power (W): 20
Voltage (V): 220-240
Size: 6''
Motor: Full copper motor
Certificate: CE/CB/SASO

Auto-shutter bathroom exhaust fan

Dry Ice Blasting -- a Better Cleaning

What Is Dry Ice?

Dry ice pellets are made by taking liquid carbon dioxide (CO2) from a pressurized storage tank and expanding it at ambient pressure to produce snow. The snow is then compressed through a die to make hard pellets.

The Process

With the dry ice blasting process, dry ice (CO2) particles are propelled to supersonic speed impacting and cleaning a surface. The particles are accelerated by compressed air, just as with other blasting methods. Overall, there are three steps involved in dry ice blasting. Also, it can viewed in diagram form (see below).

Step #1 - Energy Transfer

Dry ice pellets are propelled out of the blasting gun at supersonic speed and impact the surface. The energy transfer knocks off the contaminant without abrasion. The force of this impact is the primary means of cleaning.

Step #2 - Micro-Thermal Shock

The cold temperature of the dry ice pellets hitting the contaminant creates a micro-thermal shock (caused by the dry ice temperature of -109F) between the surface contaminant and the substrate. Cracking and delamination of the contaminant occurs furthering the elimination process.

Step #3 - Gas Pressure

The final phase has the dry ice pellet explode on impact, and as the pellet warms it converts to a harmless CO2 gas, which expands rapidly underneath the contaminant surface. This forces off the contaminant from behind. The contaminant is then relocated, typically falling to the ground. Since the dry ice evaporates, only the contaminant is left for disposal.

Operating Details

To operate dry ice blasting equipment a few details need to be considered. First, though using dry ice is extremely safe, basic safety matters need to be followed including wearing hand, eye and ear protection. First, the process is noisy and ear protection should be used. Second, the temperature of dry ice is -109 degrees Fahrenheit. Gloves should always be worn when working with it. Thirdly, in dusty areas, a mask is recommended for eye and nose protection. Otherwise, wearing standard eye and ear protection would be acceptable just as with sand blasting or pressure washing. Fourthly, the gun should never be pointed at another individual or serious injury could occur.

Also, blasting in an enclosed area is safe with proper ventilation. Because CO2 is 40% heavier than air, placement of exhaust fans at or near ground level is necessary when blasting in an enclosed area. In an open shop environment, existing ventilation is sufficient to prevent undue CO2 buildup.

Window mounted copper motor round exhaust fan

Selecting the Proper Bathroom Exhaust Fan

A bathroom exhaust fan provides good ventilation, which prevents moisture and excess build-up of mold and mildew.

Bathroom ceiling fans are called intermittent ventilation and are used to capture and remove pollutants quickly at the source. The purpose is to exhaust excessive moisture or pollutants before they can spread to other parts of the house. Areas requiring this type of ventilation are bathrooms, kitchens, utility rooms, exercise rooms, workshops, garages and home offices.

Q. Where should I install the fan?

A. Typically the exhaust points should be located over or near the shower or tub and in an enclosed water closet.

Q. If mirrors stay steamed up or the grill is dripping water, is the fan(s) operating correctly?

A. You could try leaving the bathroom fan on longer to carry out more moisture, or check the design of the duct work. Poor design or damage may prevent the fan from moving the moisture out. You can insulate the ducts and check the roof jack which may be allowing rain to come into the duct, or it could be that condensation from warm, humid air in the house is striking the cold duct surface.

Q. What is a sone level

A. Sound levels are measured in sones. The higher the sone level, the noisier the fan. Buy as quiet a fan as you can afford. The way a fan is installed will affect its noise level. A low-sone fan attached to a duct that twists and turns, or is kinked or too small, will be just as noisy as the noisiest model.

Ceiling Metal Pipe Exhaust Fan

Restaurant Kitchen Exhaust Cleaning

In order to maintain high standards of cleanliness in your kitchen, it is important that the Stewarding Department regularly do kitchen exhaust cleaning. In fact, every establishment is advised to do this. This is important for public safety. You will be able to avoid possible customer complaints.

In truth, public safety is not the sole reason why you should regularly clean your kitchen exhaust. You will be able to get more insurance discounts if you clean your exhaust regularly. Lower rates on insurance coverage are definitely something you should take advantage of. When there is less insurance risk, insurance companies are willing to offer lower insurance rates. You just have to make sure that you clean your exhaust four times a year. If you show compliance to insurance requirements, there is no reason why you would not be able to enjoy discounts on your rates.

When cleaning your kitchen exhaust, you have to shut down your restaurant before you do anything else. So, it is best to schedule the cleaning on days when business is slow. It is important that you do the cleaning fast and thorough. Restaurants cannot shut down for long periods of time. This is particularly true if the restaurant is in a hotel with a lot of hungry guests.

Compact Axial Flow Fan

How to Clean Kitchen Exhaust Fan

Turn off the power at the fuse or breaker box.
Remove fan cover if it removable. Place the fan in hot water mixed with ammonia. If it is not removable, just use sponge to wipe what you can clean. Make sure to dip the sponge in hot water mixed with ammonia. Soak for 20 minute and then brush the fan. Use a sponge dipped in the same mixture for cleaning the fan blades. Use a soft-bristled brush. Use rubber gloves at all times. It is also best to do this in a well-lit area.
Place the fan on a dry cloth or newspaper. Wipe it dry and remove excess grease or dirt. Avoid getting the motor wet. Remove the filters and soak it in hot water mixed with dishwashing detergent for 15 minutes. Afterwards, rinse the filters and dry.
We will do a series on kitchen cleaning, so you can probably train your stewards on how to do this properly. Again, it is important that you clean your kitchen exhaust at least 4 times a year in order to make sure that your kitchen is safe from potential danger which can be caused by filthy exhausts.

Ceiling Metal Pipe Exhaust Fan