Cooling maintenance for three trane systems Filters are good Blowers clean Verified drains are clear Checked dehumidifier North system was producing 10⁰ delta T. Adjusted blower speed. Now getting 16⁰ delta T Also added small amount of refrigerant to that system to balance charge to manufacturer spec Washed outdoor coils with water Advised keeping laundry room vent closed to push more air to the basement bedroom. Concerned that bedroom is hot in the summer. All three systems are operating within manufacturer's specifications at this time