Installers ensure clear out racks and get entry to panels seal tightly to preclude bypass air

https://reidmxyk353.tearosediner.net/canadian-heating-and-air-conditioning-s-guide-to-two-stage-vs-modulating-furnaces

Installers be sure filter out racks and get right of entry to panels seal tightly to save you bypass air, retaining the heat exchanger and asserting easy airflow.