Abstract: The present disclosure relates to an HVAC system door assembly that includes a door that includes a panel having a first side and a second side opposite the first side, and a first seal circuit. The first seal circuit is disposed on the first side. The HVAC system door assembly also includes a door frame that includes a second seal circuit. HVAC system door assembly further includes a ridge projecting from one of the first seal circuit or the second seal circuit configured to align with and engage a central portion of the other of the first seal circuit or the second seal circuit when the door is in a closed position with respect to the door frame. The ridge includes a cross-sectional profile having a flattened peak section with sloping side sections that extend from boundaries of the flattened peak section to a base of the ridge.

Abstract: The present disclosure relates to a heating, ventilating, and air conditioning (HVAC) unit configured to supply conditioned air to a conditioned space. The HVAC unit includes a first exhaust fan capable of operating at variable speeds and a second constant-speed fan. The HVAC unit also includes a controller configured to determine a target airflow to be provided to the conditioned space, cause actuation of the first exhaust fan at a variable fan speed when the target airflow is greater than zero, and cause actuation of the second exhaust fan when the target airflow is greater than an airflow threshold.

Abstract: A latch assembly for a heating, ventilation, and/or air conditioning (HVAC) enclosure includes a latch having a securement portion configured to couple to an access panel of the enclosure and having a rotational portion. The rotational portion has an engagement feature configured to engage with a tool face or a tool receptacle and the rotational portion has a first retainer adjacent to the engagement feature. The rotational portion is configured to rotate relative to the securement portion such that a locking portion of the rotational portion transitions between a closed configuration and an open configuration. The latch assembly includes a handle accessory having a handle engagement driver configured to engage with the engagement feature of the rotational portion along a first linking axis and having a second retainer configured to couple with the first retainer of the rotational portion along a second linking axis, transverse to the first linking axis.

Abstract: The present disclosure relates to an HVAC system door assembly that includes a door that includes a panel having a first side and a second side opposite the first side, and a first seal circuit. The first seal circuit is disposed on the first side. The HVAC system door assembly also includes a door frame that includes a second seal circuit. HVAC system door assembly further includes a ridge projecting from one of the first seal circuit or the second seal circuit configured to align with and engage a central portion of the other of the first seal circuit or the second seal circuit when the door is in a closed position with respect to the door frame. The ridge includes a cross-sectional profile having a flattened peak section with sloping side sections that extend from boundaries of the flattened peak section to a base of the ridge.