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  1. KYOnscuffle

    Balanced external static pressure question

    Thanks for the responses. With this unit being a package system, the recommended location for testing ESP is in the ducts just as they leave or enter the the system. At the pressures that I am measuring and referring to the blower performance data charts, the system should be delivering right...
  2. KYOnscuffle

    Balanced external static pressure question

    I have a 3 ton package heat pump system and have a question about External Static Pressure. The system list a max ESP 0.5 iwc. My measured ESP is .42 iwc, which includes 0.25 of the return filter. The thing I'm finding strange is the entire ESP is in the return duct, with the supply duct barely...

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