My A/H has a Dwyer Model 2001AV magnehelic differential gauge installed on it permanently.
The high pressure side is connected to the S/A plemun---and--- the low pressure side is connected to the R/A plemun via. small aluminum tubing. see photos
The A/H blower is set on the enhanced mode---and---the CFM is set on low--> 350cfm per ton--it is a 2 ton unit. ( 700 cfm at 100% )
The readings with both little plastic valves on the magnehelic gauge opened and the A/H blower at 100% ( 700 cfm ) are about .14"wc ...see photo
Going with the information I have read on this site this seems low. Seems like the average I should be looking for would be around .50" wc
Any ideas if I am looking at this thing wrong---or that I may have a issue with static/duct configuration?