Measuring air flow in an HVAC duct can be a tricky business. Paddle wheel and turbine flow meters introduce not only resistance but maintenance issue due to accumulated dust and debris.

Figure 17. Pitot tube in a wind tunnel. By pointing the tube directly upstream into the flow and measuring the difference between the pressure sensed by the Pitot tube and the pressure of the ...

This, however, does not happen. Earth's spin creates three belts of circulation (Figure 2). Air circulates from the tropics to regions approximately 30° north and south latitude, where the air ...

Air flow sensors are inserted into a duct or pipe through an access hole to measure air velocity. In other instances a capture hood is used to measure volumetric flow from a grill or exhaust diffuser.

Poor air circulation can worsen your home’s air quality. Turn on your home’s ceiling fans or open the windows when the air feels stagnant. Be sure to also check your HVAC filters once a month ...

Air Knives are pressurized air plenums containing a series of holes or continuous slots through which pressurized air exits in a laminar flow pattern. The exit air velocity then creates an impact air ...

A device in the throttle body, the mass airflow, or MAF, sensor helps the engine computer determine the proper air-fuel mixture by measuring the mass of the air flowing past it. Because a precise ...

Many readers will be familiar with the Dyson Air Multiplier, an ingenious bladeless fan design in which a compressor pushes jets of air from the inside edge of a large ring. This fast-moving air ...

As warm air rises and cold air sinks it forms three atmospheric circulation cells north of the equator and three to the south. These circulation cells move over land and sea to redistribute the ...

What's the best air fryer to buy? The air fryer is a relatively new addition to the world of appliances, and in my eyes, it's a magical countertop appliance. Whether you're an expert home chef or ...

If you want a new iPad Air at a discounted sale price, you’ve come to the right place. We’re looking at all the best deals and prices for the iPad Air right now–including contract plans.