HVAC Anemometer, AOPUTTRIVER 856A CFM Meter Airflow Meter USB Export to PC

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.

I bought this to balance the airflow from the HVAC vents in my home, because we have some hotspots. This works great, it's sensitive enough to pick up very low air volumes, which is essential for balancing. You can't do volume testing with this, you'd need a different piece of equipment, but for air speed, this works great.

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

Seems a bit light weight but for the price it’s worth it. Quality was better than i expected but i don’t plan to be too careless with it.

I got satisfactory data for what I needed it for. The accuracy seems to be OK The averaging feature does seem to work OK. The user manual is terrible. It's the worst chinglish I have run into in a long time. The data recording feature did not work the way I think the manual says it should and the software provided did not work with WIN 10. Effectively, it does not have the data recording feature advertised. Update - also could not get the software to work with WIN XP.

Needed to check for CFM from an 8" Exhaust port and balance lateral. The anemometer made it simple by just inputting the area of the duct. Does it what it should, protective case is decent.

Been using this for helping architect the ductwork for a laser machine in the home, see CFM results instantly as you change the design. I'm planning to use it to make the most efficient ductwork design in the workshop for dust extraction from the different wood working tools.

Air blows threw and does an accurate reading. Great product

Very nice product

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

I can't speak to the absolute accuracy of this device, but it works great, even at very low air flows, and is easy to use. delivery was super fast. I'm using it to diagnose weak airflow in some sections of household ductwork.

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.

Bought this for checking the air flow though a couple tubes, it worked out well