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    Should I replace HVAC system?

    I have 2 Comfort model (NAC224AKA5) HVAC systems. Both are 14 years old and are starting to see repairs necessary. It is no longer under warranty and I'm wondering if I should upgrade one of them. They both put out enough cold air and don't have any leaks. Repairs have been normal such as the...
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    Adding more filtration to "Window" AC - HVAC engineer questions?

    We are installing two 24k Frigidaire "Window" AC's in wall holes in our shop. It seems all these "window" Ac's have very basic thin filters, with definite possible gaps on the perimeter. There is a 1 to 1 1/2" https://showbox.bio/ gap between the front face of the filter and the backside of...
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