Just looking to check my static pressures as I suspect they are high on my 2nd floor air handler. I have a standard hydronic system with boiler and air handler 1 in the basement and airhandler 2 in the attic; each with its own condenser located outside. I'm located in New England.
They are both setup the same except the attic air handler has a ductopus while the basement is all sheet metal.
Return duct, return plenum, airfilter, air handler, cooling coil, blower, heating coil, feed plenum, feed duct work.
Where should I take the static? There are conflicting answers out there and I only want to drill holes once. I'm thinking just before the blower for the negative static and just after for the positive static. But I'm torn because that will include the pressure drop from the heating coil and perhaps I should just take it in the feed duct a couple feet down and assume laminar flow.