Quote from: wndsnb on Today at 01:28:02 PM

The specs I suggested would be if you are removing the original fans and replacing them with ducts and duct fan(s). If you are not removing the fans on the miner, then the specs are a lot lower since all you need to do is deliver the max airflow the miner will require and only overcome the static pressure of your ducts and filter.

The 10" AC infinity fan lists a static pressure spec of 1059 Pa, which is 108 mmH2O, so I'd guess it has a good chance of working if your ducts aren't too long.

Is there a calculation to see the static pressure, to see the max duct I can have.
The plan is:
Intake Inside: AC Ininity 10" Air filter box --> ~ 2 ft Insulated 10" duct --> AC Infinity 10" Inline duct fan --> Reducer to 8" --> "Y" Split to 2 ducts( far each machine) --> ~ 8 ft Insulated 8" duct to the machine to attached 8" shroud

Exhaust side": ~2 ft Insulated 8" duct from machine --> Combine ducts with Y from another machine; will look preferably for 8" to 10 " --> ~ 2 ft 1nsulated 10" duct -->AC Infinity 10" Inline duct fan --> ~8 ft Insulated 10" duct possibly pointed upwards towards 2500CFM exhaust fan

Should I expand the duct from 10" to 12 " On the exhaust side, afte the duct fan, to minimize any resistance

Do you forsee any static pressure issues / what is the longest duct you think I could use?
Planning to use this duct - https://www.homedepot.com/p/Master-Flow-16-in-x-25-ft-Insulated-Flexible-Duct-R6-Silver-Jacket-Pack-of-6-F6IFD16X300-6PK/313315084

Quote from: philipma1957 on Today at 02:10:25 PM

as an aside that fan has a speed control which will allow you to reduce speed if needed.

Duct size reduction = less air flow so maybe you can just run the fan at full speed.

if the ducts are 20 feet long you may need a booster fan near the exit at the window.

Thank you. Yeah, I may just run the fans at max. I wish I knew how to calculate the max duct run I could use before needing another fan at the end