Duct Traversing: Low to High Velocities and at High Air Temperatures Air velocity measurements are often taken within ducts to determine flow rate. Since velocity distribution is not uniform even in ...

When I needed to balance a bunch of HVAC ducts, I used 1″ foam board & duct tape to make a funnel and put a large muffin fan at the small end. I used a DVM to read the output voltage from the fan.

This assures that all ducts are tested the same way so we have uniform performance data. The ASHRAE Duct Fitting Database (current version 6.00.05), initially offered in 1994, is an online database ...

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. Being able … ...

Hybrid Laminar Flow Technology (HLFC), a combination of active flow control and specific laminar profiles, is a promising possibility to reduce the drag of aircraft wings and empennage. While the ...