Blowers and Positive Pressure Fans

The theory of positive pressure ventilation is based on the principal of even pressure distribution. Once a structure is pressurized, air and smoke can be forced out through any opening (similar to escaping from an inflated baloon).
Buffalo Blower Co. makes low Profile Positive Pressure Ventilators that have been designed to fit in tight compartments ans small spaces without scarificing performance or features. These compact ventilation blowers are available is both gasoline driven conviguration and with 115/230V single phase electric motor.
Electric smoke ejectors (negative pressure ventilation) can be used for smoke removal but this has proven to be inferior to positive pressure ventilation.
What makes Positive Pressure Ventilation superior to negative pressure ?
* The risk of injury from the engaged structure is reduced while placing the fan in operation.
* Positive pressure ventilation is faster to set up and requires fewer personnel.
* The Positive Pressure Blower has a self contained power source, while electric fans require cords and adaptors.
* Smoke and heat is removed from all levels of the structure unlike negative pressure which can result in localized extraction.
* Quicker results. After initial knockdown, positive pressure ventilation can be initiated and will show immediate improvements in the interior conditions.
* It allows replacement of contaminants with vital cooler, cleaner air - especially in sealed or windowless buildings. It's also very effective in large and compartmentalized buildings, warehouses, schools, etc.
* Quick results allow firefighters faster entry due to lower heat levels and improved visibility.
The following criteria should be considered for effective use of Positive Ventilation:
- The cone of air must cover the intake opening. The fan must be placed the correct distance from the structure such as that the cone of air forms a seal around the opening.
- The size and location of the discharge is important. The discharge, if at all possible should be as high and far away from the intake as is practical. The discharge size should be between 3/4 to 1/2 times the intake. This may not always be possible as the fire may have already dictated discharge locations and sizes; but whenever there is a choice, the above criteria should be used.
- It is important to control the ait flow between the intake and discharge. Positive pressure ventilation can move air long distances if proper control is maintained by opening and closing doors, windows, etc. It is important that firefighters understand not to open the structure too much: ie breaking windows, etc.
The standard features of Buffalo Blower Co. Positive Pressure Ventilators include: fold down "T" handle; 8" pneumatic tires with full width axle; a "tilt and lock" device that allows the unit to be angled 20 degrees up or down with infinite positions in between; sturdy and light 1 inch wrap around frame. Explosion proof electric motors are available as drivers too.
The optimum ventilator placement distance on most 6'6" doors is about five to six feet away. If placement is too close, the seal won't be achieved. If placement is too far away, the cone of air will be hitting well outside the opening.

Which Kinds of Snacks Keep Healthy?

Snacks, such as low sugar, low fat, low cholesterol, low cholesterol or no containing chemical additives food make you obtain nutrient while enjoying the delicious.
Yogurt
The best resource of calcium for human beings is from milk. It's low in calories and can make skin soft and moisturized. Yogurt not only contains rich nutrients, but also easy to digest and absorb. Therefore, it's a good choice for the lactose intolerance who wants some snacks.
Fruit
It's the best snack. Many fruits are beneficial to beauty &skin care, such as oranges, lemons, tomatoes and so on. They contain rich vitamins and increase the body's resistance to germs, slow or prevent melanin synthesis, whiten skin. They can also improve digestion and treat constipation.
Raisins
Raisins are made of fresh grapes without adding any ingredients, so their nutrients are well preserved. This kind of snacks does not contain the cholesterol, even can reduce cholesterol levels in the blood.
Meat products
Rich in protein, iron, zinc and other essential nutrients for human body, meat products make you full and still can exercise chewing ability to improve teeth health. Because of containing rich fat, it's necessary to control the volume while eating.
Nuts
People have a lot of work or are easy to get brain fatigue, and this snack can help them relieve these problems for them. All kinds of nuts contain essential fatty acids and other nutrients for human beings' development. What's more, often eating nuts make skin smooth and soft. Notes: over-eating will make you gain weight.
Grilled fillet
Although the moisture content is reduced, its nutrients are preserved which can make your skin rosy. The rich iodine of it can prevent you from high blood pressure and coronary disease.
Chocolate
As a brain worker, sugar is the main energy source. According to the latest research, chocolate with other materials through chemical reaction in your body can make you get cheerful and also contribute to control the cholesterol level and protect heart.
Having known these snacks, you should not control your extremely desires for eating snacks, what need to do is to choose the proper snacks for your health.

Great Outdoor Cooking Using Iron Woks

For many picnics and barbecue weekends people are now shifting from the regular barbeque pits and opting for iron woks, with gas as the source of heat. This is because a wok enables you to prepare several dishes at a go and healthily at that. The convex design of woks allows fats and greases from oily foods to collect at the centre. You can also use the center to simmer sauces or cook pasta or rice. The wok-propane combination is just perfect as propane heats the wok fast, it is a clean fuel, and it is applicable in remote camps and picnic sites where electricity or wood fuel is not available.

Iron woks, often known as discadas in the Southwest region of the US, have a long history as cooking apparatus since back then when campers, hunters and cowboys used plow discs as heating surfaces. The mid section was sealed and horseshoes were welded on the sides to create handles. This made them look like the oriental woks used in the Asian world. There is virtually nothing that is cooked on the conventional grill, including steaks, popcorn, kebabs, a full breakfast etc that cannot be cooked on a wok. Taking this yesteryear idea and engaging the convenience of propane as the heat source makes outdoor cooking a very exciting experience.

Every time we leave for camp we need to put together the iron wok, gas tank, burner, the stands and so forth. Wouldn't we like it if we can have iron woks that are accompanied by special burners, a beautiful frame that can support the gas tank, and finished off with a base full with castors for easier mobility? You may also opt for a tabletop grill with all the above accessories except the castors. Whatever you opt for, the internet is always ready with these options, and which can even be customized to particular tastes. You just have to make sure you find one with a heavy frame and not those rickety contraptions we see at several camping stores.

There are several things to consider when using iron woks to prepare dishes. Top on the list is taking care of the cooking surface. This surface is normally seasoned to protect it from rust as the wok is made from iron. When new, the wok comes covered in a layer of vegetable oil. It should thus be subsequently protected from the elements and covered with a thin layer of oil during long periods of non use. It is often advised not to clean the wok with soap as iron has small pores which will absorb soap and in turn affect the taste of your food. Instead, just heat the wok prior to using it so as to melt away the storage oil and it will be clean for use.