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gtojohn · 09-24-14, 10:37 PM

I use one of these when it comes time to quantify airflow and changes. I does require some averaging.
http://www.amazon.com/General-Tools-...ords=meter+fpm
One of the biggest difficulties for diy systems would be btu measurement. I see variations in manufacturer's btu certifications on systems' output with the same condensing unit and different blower or coil options. Without the correct btu output you can't calculate seer or btu per watt.

09-24-14, 10:37 PM	#461
gtojohn Journeyman EcoRenovator Join Date: Jul 2014 Location: Austin, TX Posts: 314 Thanks: 39 Thanked 50 Times in 45 Posts	I use one of these when it comes time to quantify airflow and changes. I does require some averaging. http://www.amazon.com/General-Tools-...ords=meter+fpm One of the biggest difficulties for diy systems would be btu measurement. I see variations in manufacturer's btu certifications on systems' output with the same condensing unit and different blower or coil options. Without the correct btu output you can't calculate seer or btu per watt.