Abstract: An air handling unit (AHU) for a heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a housing and a combustion heater disposed within the housing. The housing includes a combustion section with a first channel and a second channel. The combustion heater includes heat exchanger tubes and a tube support that supports heat exchanger tubes within the combustion section. The tube support slidably disposed in the first channel and the second channel. The combustion heater configured to be slidably removable from the AHU. An AHU for an HVACR system includes a housing with a fan section and a fan assembly disposed within the housing. The fan assembly including a pair of grooves slidably disposed on a pair of rails of the housing. The fan assembly configured to be both slidably removable from the AHU and liftably removable from the AHU.

Abstract: An air handling unit (AHU) for a heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a housing and a combustion heater disposed within the housing. The housing includes a combustion section with a first channel and a second channel. The combustion heater includes heat exchanger tubes and a tube support that supports heat exchanger tubes within the combustion section. The tube support slidably disposed in the first channel and the second channel. The combustion heater configured to be slidably removable from the AHU. An AHU for an HVACR system includes a housing with a fan section and a fan assembly disposed within the housing. The fan assembly including a pair of grooves slidably disposed on a pair of rails of the housing. The fan assembly configured to be both slidably removable from the AHU and liftably removable from the AHU.

Abstract: To protect a client system from unauthorized programs, a scanner application for detecting particular unauthorized programs is maintained on a host system and periodically provided to a client system that executes the scanner application. Targeted solutions to particular types of unauthorized programs also are maintained on the host system and provided to the client system. If the scanner application detects an unauthorized program on the client system, a remedy that is targeted only to the detected unauthorized program is programmatically initiated to remedy the problem of the detected unauthorized program.

Abstract: A technique for automatically updating software, including but not limited to application programs, residing on, e.g., a client computer. Specifically, an update script is stored on a network server for each software product to be updated and, where appropriate, for each different country or locale in which that product will be installed. At a scheduled time, the client computer automatically, through an executing updating application: establishes a network connection to the server; constructs a file name for a file containing an appropriate update script; and then downloads that file from the server. The script contains appropriate update information, including whether the update is to occur through a web site or through the script, and if the latter, listings of operating system (O/S) specific and O/S-independent product update files.