Positive pressure ventilation (PPV) fans are used by the fire service when they have to fight fires in buildings. Fire departments may use ventilation blowers or fans to pressurize a building before they try to put out a fire. You can use this "pressurization" or "positive pressure ventilation" (PPV) tactic to help vent smoke and high-temperature combustion products and make it easier to fight the fire than if you didn't use PPV. Negative pressure fan have low air pressure inside than outside environment.
Fresh, clean air is essential to good health. However, mold, condensation, and other issues that can have serious consequences for the structure of your home and for the health of its occupants.Heat recovery ventilator ( also called fresh air system) and air purifiers are useful "weapons" to solve the problem of home air quality. The Basic Principle The heat recovery ventilator is an air circulation treatment system consisting of a ventilator, a pipeline, etc. The main function is to filter and purify the outdoor fresh air into the room through the pipeline, while diluting the indoor carbon dioxide content and increasing the indoor oxygen content, and Indoor dirty air is discharged outside to keep indoor air fresh. The air purifier...
Proper air circulation and ventilation are crucial in any home, because airflow regulates temperature, removes impurities, prevents mold and just creates a more pleasant and safe breathing environment. Poor indoor air circulation isn't just annoying. It can lead to health concerns, and even worsen the effects of asthma. There are steps you can take to improve indoor air circulation. 1. Open Doors and Windows This is the most simple and obvious way to immediately improve the indoor air circulation. By simply opening windows in different rooms, you can create a cross flow that improves the circulation of the entire house. 2. Install Exhaust Fans Install exhaust fans, especially in the kitchen and bathroom. An exhaust fan works sort of like...
At home or in the workplace, extractor fans are pretty important. They make it easier to get rid of odors and stale air in rooms. Extractor fans can be mounted on a window or a wall and come in various shapes and sizes.
What's Noise? Noise is unwanted sound judged to be unpleasant, loud or disruptive to hearing.There are two important characteristics of sound or noise - frequency and loudness.The higher the frequency, the more high-pitched a sound is perceived.Loudness of sound is commonly expressed in decibel (dB), the more intense the sound, the higher the db count. Long exposure at 85 dB is dangerous; at 120 dB, even short exposure can do damage. Here's how some sounds score: Sample dB count Nearby Whispering 30 dB Refrigerator Humming 40 dB Air Conditioner 60 dB Lawn Mower 80 dB to 85 dB Approaching Train 100 dB Ambulance Siren 120 dB Causes of Fan Noise Noise emanating from ventilation fan is a function of many...
