A heating, ventilation, and/or air conditioning (HVAC) unit includes a heater housing having a first side wall, a second side wall opposing the first side wall, and a ceiling extending between the first side wall and second side wall. The HVAC unit also includes a first mounting rail disposed across the first side wall at a first distance from the ceiling, and a second mounting rail disposed across the second side wall at a second distance from the ceiling. The first distance is greater than the second distance. The HVAC unit also includes a heating element assembly coupled to the first and second mounting rails and having a planar heating interface extending from the first mounting rail to the second mounting rail.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.

An electric radiator for a ventilation, heating and/or air-conditioning system of a motor vehicle, including at least one heating element forming a heating body and an electronic control device of the at least one heating element housed in a housing, the heating body and the housing being integral with each other. The electric radiator includes a separating wall arranged between the housing and the heating body. The radiator includes at least one support for at least one temperature sensor, the support being arranged such as to at least partially overlap with the at least one heating element in the heating body. The electric radiator includes an electronic connecting element between the at least one temperature sensor and the electronic control device. The separating wall includes at least one orifice configured to be traversed by the electronic connecting element.

An electric radiator for a ventilation, heating and/or air-conditioning system of a motor vehicle, including at least one heating element forming a heating body and an electronic control device of the at least one heating element housed in a housing, the heating body and the housing being integral with each other. The electric radiator includes a separating wall arranged between the housing and the heating body. The radiator includes at least one support for at least one temperature sensor, the support being arranged such as to at least partially overlap with the at least one heating element in the heating body. The electric radiator includes an electronic connecting element between the at least one temperature sensor and the electronic control device. The separating wall includes at least one orifice configured to be traversed by the electronic connecting element.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.

The disclosed technology includes an axial fan assembly for an air handling unit. The axial fan assembly can include an axial fan that is configured to direct a flow of air along an airflow path through the axial fan assembly and a stator that is disposed in the airflow path downstream of the axial fan to at least partially straighten the flow of the air. The axial fan assembly can include a heating element assembly disposed in the airflow path downstream of the stator. The heating element assembly can include a heating element having a generally toroidal shape having an outer diameter less than an inner diameter of a casing disposed around the axial fan. The heating element assembly can have one or more supports configured to space the heating element a distance downstream from the stator to form a gap between the stator and the heating element.

The disclosed technology includes an axial fan assembly for an air handling unit. The axial fan assembly can include an axial fan that is configured to direct a flow of air along an airflow path through the axial fan assembly and a stator that is disposed in the airflow path downstream of the axial fan to at least partially straighten the flow of the air. The axial fan assembly can include a heating element assembly disposed in the airflow path downstream of the stator. The heating element assembly can include a heating element having a generally toroidal shape having an outer diameter less than an inner diameter of a casing disposed around the axial fan. The heating element assembly can have one or more supports configured to space the heating element a distance downstream from the stator to form a gap between the stator and the heating element.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.

A protective barrier affixable to a curved substrate comprises a stack of two or more lenses, each of the two or more lenses including a polyethylene terephthalate (PET) film, a hard coat on a first side of the PET film, and an adhesive layer on a second side of the PET film opposite the first side. The stack of two or more lenses may have a modulation transfer function that exhibits a contrast value greater than 75% for a spatial resolution of one line-pair per 0.0003 radians at 65 degrees angle of incidence. Heat and pressure may be applied to conform the stack of two or more lenses to the shape of the curved substrate.