Digital Pro Anemometer Handheld AP-856A USB Anemometer HVAC Wind Speed Meter with Backlight Max/Min/Avg Functions for Measuring Wind Speed Air Velocity Temperature Air Flow Meter

Only backlit button should be given seperate and long term on .

I purchased this anemometer to evaluate the airflow on two different HVAC systems: a 2-ton ducted mini-split in my garage and a 16-year-old 4-ton gas package unit serving my 1,900-square-foot home. The meter was easy to use, and I used AI to help convert and analyze some of the airflow readings. The results were very informative. The biggest surprise was my home's ductwork. Based on the airflow measurements, it appears the existing duct system is really sized for about a 3- to 3.5-ton system rather than the 4-ton unit that's installed. That information will save me money when it's time to replace the system because I'll likely install a 3.5-ton unit instead of another 4-ton. The garage system was another story. The airflow measurements showed the 2-ton ducted mini-split is properly matched to the ductwork and is performing right where it should. Overall, this meter gave me useful, real-world information that I would not have known otherwise. If you're a homeowner, HVAC technician, or serious DIYer who wants to verify airflow and make informed decisions instead of guessing, I think this is a worthwhile tool.

Reading other reviews makes it seem that some don't understand how to use these things. I have had great results using it for air volume for residential room-by-room air balancing. A simple 4x10 dust collection hood & a 4" to 2 1/2" reducer was all I needed to attach the wand to making an air capture hood to easily and accurately obtain airflow readings while quickly and easily changing my free area value on the device to match the pipe size being tested. 1. The wand for airflow IS directional, there's a direction of airflow indicator arrow located on the interior where the rotating vanes are on the perimeter 2. To enable PC connection you may have to enable COM3 legacy port if on windows 10/11 3. To properly get CFM or L/s reading, anyone actually trained for HVAC should already know this....but you need to set your free area in sq.ft on the unit when in AIRFLOW setting of either your square/rectangle duct or the cross-sectional free area of the round supply pipe if taking measurements at the register. For duct it's simple, HxW for free area, and for round pipe just google it. 4. Alternatively just leave it on velocity and capture the air speed and manually calculate your CFM or L/s if #3 proves too difficult to do on the fly.

Helped me diagnose and verify the need for additional coolant in HVAC condenser....showed the results to the service guy and after verifying the warm temperature, performed a cooling pressure test and recharge... for builder warranty

The anemometer works well for measuring airflow, but I purchased it partly because the listing indicated that stored measurement data could be exported to a computer. I later discovered that only real-time measurements can be saved to the PC; historical data stored in the device cannot be exported. I contacted the seller, and they investigated the issue with their engineering team. They acknowledged that the product description and manual were misleading and handled the situation very professionally, offering me a full refund without requiring me to return the device. Overall, the device is useful, and I was very satisfied with how the seller resolved the issue. I’m giving it 4 stars because of the limitation with stored-data export.

Using all the tools to provide an experts provision to the customer anemometer works good