Jake Kring. 02-14-25. I arrived for a club member fall tune up. I inspected the system with the homeowner and found the gas pressure, combustion readings and electrical components to be running well within manufacture specifications. We found the static pressure to be running under the manufacturer specifications in medium speed for the heat mode but what we have found in the past is the static will exceed the 0.50 IWC in cooling mode when the system runs in high speed. The system is running well at this time in heating mode. We briefly discussed the additional return and did not look into adding the return.