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Tag Archives: HVAC


ventilations fans 1SKU #D1143684

Explosion-proof exhaust fans, or hazardous location fans, provide proper ventilation for spaces where flammable gases, vapors, or dusts may be present.  These fans are designed to be non-sparking, which minimizes the risk for sparks that could ignite potentially flammable materials.  For example, in an environment with flammable gases, if a non-explosion-proof exhaust fan were to tip over and hit against another metal object, a spark would very likely be emitted.  In the most at-risk locations, one spark is all it takes to cause an explosion.  Thus, the entire fan must be constructed with non-sparking materials, including aluminum or copper fan blades, and an explosion-proof motor.  An explosion-proof exhaust fan is a widely used piece of equipment in gas stations, chemical and metallurgy plants, and construction sites.

exhaust fan 2


Each explosive-proof fan is marked with a specific code that provides vital safety information. When selecting an exhaust fan, refer to the fan’s safety code. Higher-risk work spaces require fans that meet safer standards, and using the wrong type of fan can be potentially hazardous.

These codes contain four pieces of information:  the classification standard (either American or Canadian), the protection concept code, the gas group, and the temperature code. This is a typical marking:

AEx t IIB T4

“AEx” means Explosion Protection, and it is the American standard classification code (the Canadian code is “Ex”). In addition, the “t” refers to the protection concept code, the “IIB” is the gas group, and “T4” indicates the temperature code.

exhaust fans 3


A range of construction and industrial locations require the use of explosion-proof exhaust fans, and different types of ventilators to be used based on the facility’s explosion risk.  The fans are categorized into three class types that represent varying levels of risk:

  1. Class I

Class I locations are those in which flammable gases or vapors could be present in the air in quantities sufficient to produce explosive or ignitable mixtures.  These sites include paint spray booths, dry cleaning plants, and oil refineries.

exhaust fans 4

  1. Class II

The facilities in this classification have combustible dust that may be present in varying hazardous concentrations.  Among these locations are grain elevators and food powder processing plants. The risk for explosion in these facilities is greater than Class I, and the materials have lower ignition points.

exhaust fans 5

  1. Class III

Facilities in this class carry the highest risk and include locations like textile mills, cotton production plants, and woodworking facilities.  Class III hazardous locations contain easily ignitable fibers or flyings, but the concentration of these fibers or flyings are not suspended in the air in such quantities that would produce ignitable mixtures.

exhaust fans 6 is your source for high quality, safety-rated explosion-proof exhaust fans. Browse our extensive inventory of ventilation equipment which are now available at the best prices today!

Keep Your Home or Business Cool with HVAC Products

Summer is here and so are those unbearably hot weather days. On hotter days, you’ll need to have a plan in place for cooling your home or business. This is especially important in warmer climates where the heat is more persistent.

Sky at Sunset

Besides investing in an HVAC system, there are several other methods you can use to keep the heat out and the cooler temperatures flowing.

Follow these 9 steps to feel more comfortable.

1.) Start by keeping sun light out using blackout curtains, shades or blinds.

2.) Install a ceiling fan if you don’t have one. Ceiling fans will lower the temperature of any room and will make a great addition to your air conditioning system.

3.) If you have a ceiling fan, ensure it works properly. In the summer months it should rotate counterclockwise as opposed to clockwise in the winter months.

4.) Keep doors closed to prevent warmer air from flowing in. 

5.) Close the doors of rooms or offices that you don’t use to keep the cooler air in more frequented areas.

6.) Run appliances such as washers and dryers at night.

7.) When cooking, be sure to turn on the exhaust fan to quickly get rid of unwanted heat.

8.) Turn off lights when not in use.

9.) Use portable ventilators or misting fans inside industrial or manufacturing environments.


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If you are willing to make the investment, there are more permanent changes or improvements that you can make to your home or office to prevent over heating and allow for greater air flow. This includes:

  • Added insulation.
  • Minimize heat from the sun by adding trees to your landscaping or installing awnings around large windows.
  • Install a dehumidifier to rid your home or office of extra moisture.
  • Install a cool or reflective roof.

Deelat Industrial is your source for HVAC supplies and products. Whether you require exhaust fans, air curtains or ventilators for your business, Deelat has you covered. Shop with us today and save!

Mine and Tunnel Ducts: Quick Guide to Buying Ducts

Proper ventilation is extremely important in the tunneling and mining industries, and typically these mission-critical exhaust systems are built with flexible duct. In these locations, ducts must be durable and dependable, ensuring hazardous fumes, gases and dusts are efficiently and safely removed from the site.

Deelat Flexible Duct
Deelat Flexible Duct

Mine and tunneling flexible ducts are similar to those used for in-home HVAC systems. But industrial ducts are typically more durable and rated for extreme temperatures. Additionally, flexible ducts are generally built with higher-quality materials, including a PVC fabric tunnel that is reinforced with wire around the outside.

Aside from mine and tunneling operations, these industrial ducts are used for:

  • Paint Booth Exhaust
  • Fume and Exhaust Ducting
  • Manufacturing Ventilation

If you’re setting up an exhaust system, here are a few quick considerations to make when choosing flexible duct.

Choosing a Flexible Duct for Industrial Applications

Every mining or industrial operation has unique duct needs, but in general, there are several areas you should focus on when choosing flexible duct. Be sure to consider:

  • Length and Size: When sizing duct, first consider the length and the size (which is a measure of the tunnel’s diameter). Typically, ducts average between 4-8 inches in diameter, and they can be of varying lengths up to 50 feet or more. But in general, flexible duct provides the best ventilation at shorter lengths of less than 15 feet.

    Mining Duct in Action
    Mining Duct in Action
  • Temperature Rating: In extreme industrial operations, the environment and exhaust being vented may be very hot. Each duct should be properly rated for the ambient temperature and the temperature of the exhaust. There are many options, from standard up to extreme temperature ratings.
  • R-Value: The duct’s R-value is a measure of its insulation. In general, though, exhaust and ventilation systems don’t require ducts that are insulated. But in operations that require hot or cool air to be transported, insulated ductwork is more efficient and a higher R-value would be useful for maintaining temperatures.
  • Durability, Material: The materials that are used to build the ducts are very important in industrial operations that require mission-critical performance. Low quality materials are more prone to failure, which can be especially problematic in these operations. Most flexible ducts are constructed with plastic fabric. PVC fabric or vinyl tends to be the most durable. Additionally, higher-gauge wire made from aluminum offers sturdy reinforcement.

Shopping for industrial flexible ducts? offers a range of flexible duct designed for mining and tunneling operations. Shop our store for best pricing, fast shipping, and a huge selection.

How to Choose a Misting Fan for Home or Office

In warm climates, misting fans are an ideal solution for escaping the heat. Here’s why: Not only does a misting fan create cool air, it also creates a cool cloud of water vapor that’s pushed out along with the air. The result is an immense cooling effect. In fact, misting fans can lower ambient temperatures by has much as 50° F.

Misting Fan
Misting Fan

For consumers, there are a range of options for in-home misting fans. Many look similar to standard fans and might feature either a pedestal or box fan build. But misting fans also contain a reservoir for water, up to 10 gallons or more, as well as a nozzle system attached to the fan’s cage. Overall, they’re extremely easy to use and they can be used inside or out to cool off you and your guests.

So what do you need to consider when buying a misting fan? Here are a few features and specifications to look for:

  • Build Quality: You should look at two areas when considering the build quality. First, look at the fan head and blade. All-metal options are the most durable, and they’re ideally suited for outdoor use, while plastic offers a more cost-effective solution but might not last as long. Additionally, you should consider the motor. A misting fan’s motor should be powerful, and built from high-quality materials.

    Misting Fans
    Misting Fans
  • Power: In general, the more power the fan’s motor has, the cooler it can make an environment. For fans that will be primarily used outdoors, choose a misting fan with substantial power of at least 200+ Watts. You should also consider the area that the fan is designed to cool. More powerful fans can cool larger areas, so if you plan to cool a garage or deck, choose a fan that has enough power.
  • Cooling Effect:  Misting fans are typically rated for their overall cooling capacity. In general, the range is about 2-10° C, which is 35-50° F. This cooling effect will be limited in outdoor environments, as the cool air will dissipate. But the measure is fairly accurate in indoor spaces.
  • Water Capacity: A misting fan’s tank may range from 2 gallons up to 10 gallons or more, which is about 40 liters. The advantage of a larger capacity misting fan: You will have to fill it up less frequently. But with more water in the tank, the fan will be less portable.
  • Flow Rate: Flow rate is the speed at which air moves from the fan. In the U.S. this rate is measured in CFM. Typically, in average sized interior spaces, 700 CFM should suffice, which is about 20 m3/minute. Yet, there are many options that have much greater flow rates, up to 200 m3/m or more. A fan with a larger flow rate will produce a greater stream of cooler air and be more effective at cooling.

Looking for the best prices on home misting fans? Shop on We carry a variety of misting fans at unbeatable prices, offer fast shipping throughout North America, and carry high-quality private-label fans.

Air Curtains: How to Insulate Doors with Air Curtains

Air curtains – which are sometimes called air doors – are widely used in industrial and retail locations. These machines deliver a continuous stream of downward air over a doorway. In effect, the airstream prevents non-conditioned exterior air, as well as bugs, dust and fumes, from entering the protected space. Air curtains have many applications across a variety of industries.

Air Curtain Over Entry Door-min
Air Curtain Over Entry Door-min

In industrial spaces – like loading docks – air curtains are used to improve building efficiency. For example, as loading dock doors are open quite frequently, the airstream acts as an insulator. In cold months, cold exterior air is prevented from penetrating the facility, and in warmer months, warm air is prevented from entering. Additionally, air curtains are used in production facilities to separate two different spaces, and in large retail stores, air curtains are used to protect front doors which might stay open for long periods of time.

With air curtains, the entrance can remain open and sight-lines through the doors are improved, without compromising the efficiency of the building. Additionally, these can eliminate strong drafts at front entrances, improving worker comfort. Air curtains offer a more sanitary and more efficient solution compared to plastic strips.

Air Curtain-min
Air Curtain-min

How Do Air Curtains Work?

Air curtains typically are designed with large intake vents on the front of the device. Interior air enters into these intake vents, and then it enters a fan housed within the curtain. The fan essentially speeds up the air, which allows it to be pushed out evenly across a nozzle along the bottom length of the fan. Primarily, there are two types:

  • Non-recirculating: This is the most common type, because it is more cost effective to install and offers great energy savings. The big difference is that non-recirculating fans do not capture the air that is projected downward. Instead, it moves freely back into the environment. To choose a non-recirculating air curtain, you would first measure the doorway and including height and width. Choose an air curtain that is nearly the length of the doorway, as well as one that delivers an airstream that will cover the height of the door.
  • Recirculating: Recirculating systems are often installed in retail locations and they are much more expensive to install. Essentially, the system is a self-contained system that encompasses the entire door. The system works as air enters the curtain and is pushed downward. Yet, with these systems, there is a vent system at the floor length of the door that captures the air and recirculates it back up to the fan. It requires ducts at the floor and around the frame to complete the circulation cycle, and is thus, more costly. Because of this, these aren’t often installed aftermarket.

Additionally, there are non-sparking air curtains, as well, that are typically installed in industrial environments where flammable dusts and fumes may be present. These systems are designed to limit or prevent flammable sparks from being emitted from the device.

Looking for industrial and commercial air curtains? is your source for the best prices on non-recirculating air curtains. Contractors, builders and constructions professionals buy industrial products every day on Fast shipping, affordable prices, unbeatable selection – guaranteed.