Speed Unit Selection: m/s, Ft/min, Knots, Km/hr, MphBack LightLow Battery IndicatorMAX/MIN for wind velocityAverage/ 2/3MAX for wind flowRecords 600 groups of measurementData holding, storing and deleting functionManual / Auto Power Off after 5 mins without operationUnit switchable for wind velocity, temperature and wind flow will continue to introduce more cost-effective products to our customers. Customer service team will reply and solve your problems within 24h. Data Hold,/ Switch,Stretchable and adjustable blades,A greatest weather monitor for windsurfing,sailing,flying and shooting.*****CFM MeterWind flow range: CFM 0-999900 ft3/min, Resolution: 001-100, Wind flow area 0.001-9999 ft2,Wind Flow Calculate Formula: Flow =velocity *(Free Area) A good and protable CFM meter for you to measure HVAC,Air Blower and Air Velocity.*****Air Flow Area Setting You can press the ''AREA" key,then press the numbers keys to enter a new duct area,such as the number 1 or 2,Then press the "ENTER" key to confirm,YoĪnemometer Handheld AP-846A CFM Pro Anemometer HVAC Wind Speed Meter with Backlight Max/Min/Avg Functions for Measuring Wind Speed Air Velocity Temperature Air Flow Meter Our Commitment provide 2 years warranty and lifetime user tech-support. **********Best Quality Guranteed.*****High Precision AnemometerWind Speed Range: 0.001~100 mph (Accuracy: +/- 3%+0.2 rdg),0.001~45m/s (Accuracy: +/- 3%+0.1 rdg) Temp Range:32~113 Resolution: 0.001 mph.Measure wind speed in MAX/MIN/Current.Display in 5 units: m/s, km/h, ft/min, knots, mph.*****Multi-Function Air Flow Meter1.69 x 2.3in Large Display with Backlight makes it easy to read, Low power indicator remind you Replacement battery in time.Traverse the airflow in the exhaust duct. Then the average feet per minute is multiplied by the area of the duct in square feet to determine the airflow moving through the duct. So if I need to measure the airflow from a vent, what tool do I need? Because this is what a search finds meĪn anemometer, a test instrument that measures air velocity is used to determine the average air speed in the duct. YOu also through in so much stuff to make something simple over complicatedĪre you saying airflow on a single stage van varies when heat is called for, and when just the fan is running by itself? Lots of things would be useful, but tell me, as a homeowner how would a person know total cfm going to the vents So I go to a vent, do a test, close a vent somewhere else, do a test And as well test them as zones open and close. I want to know what increase in airflow is from the farthest vents, if I close the closest vents to the furnace. Many people on othger threads want to measure the air coming out of their vents to balance their system. I want to test what the airflow is, with even just the fan running. It is a chinese company but even if you buy american, the tools are all made in china anyway. Have no idea if holdpeak is good quality though.
I was looking into buying a multi-meter meter from holdpeak last year, emailed support and they actually answered my questions, which is a good sign. This is one of the first on the page that can accept area (it has an area button). What an anemometer measures is velocity, not cfm.
If you do buy one, look for something that allows you to enter the open area of the vents so it calculates airflow/cfm on the fly. Can help determine if you have a major leak. It would be useful to determine total cfm going to the vents vs estimated system airflow based on temp rise test, and how it varies as dampers are adjusted, when just one zone is on. I'm unsure of how much value the tool would be directly for balancing without knowing the heat loss of each room and how much airflow each needs.
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