Abstract: An energy saving HVAC system for a passenger compartment of an over the road vehicle comprises a controllable air conditioner system for directing cooled air flow through the passenger compartment. A controllable heater system directs heated air flow through the passenger compartment. A user control panel includes user input devices for manually selecting operating parameters of the HVAC system, one of the user input devices comprising an economy mode selector. A controller is operatively connected to the air conditioner system, the heater system and the user control panel. The controller normally controls the air conditioner system or the heater system in accordance with manually selected operating parameters and, responsive to a user manually selecting the economy mode, overrides the manually selected operating parameters and controls the air conditioner system or the heater system at a preselect energy saving level responsive to the economy mode being selected.

Abstract: A vehicle heat transfer module including a conduit for air circulation, an evaporator in the conduit between the cabin air input and cabin air output, and a heater having vehicle engine coolant circulated therethrough, the heater being in a first path between the evaporator and the cabin air output. A first door selectively opens or closes the fresh air input and fresh air output, and a second door blocks a selected amount of cabin air from the first path. A controller controls the first and second doors responsive to heating and cooling requirements.

Abstract: A sealing system for sealing a hose to a barb coupling, the hose and barb coupling defining a joint having a high pressure portion associated with the barbed portion of the coupling, and a low pressure portion associated with the barbless portion of the coupling, the system comprising a constant displacement clamping portion for mounting on the portion of the hose positioned over the high pressure portion, and a constant tension clamping portion for mounting on the portion of the hose positioned over the low pressure portion.