Secondary HVAC System

Assembly

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An independent rear air-conditioning and heating unit, since the donor system cannot condition the added cabin volume.

Direct parts	6
Total parts	7
Class	Assembly

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An independent rear air-conditioning and heating unit, since the donor system cannot condition the added cabin volume. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Secondary HVAC System parts and their functions

6 top-level parts · 7 parts in total · full bill of materials below

Secondary HVAC System parts diagram: 1 rear evaporator unit, 2 blower motor, 3 heating element, 4 refrigerant line set, 5 HVAC duct set, 6 rear climate controller. 7 parts in 6 top-level items. — Secondary HVAC System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Rear Evaporator Unit	1×	Trunk- or roof-mounted evaporator coil and expansion valve rated around 7 kW of cooling.
2	Blower Motor	2×	Electric motor coupled to a centrifugal fan wheel that moves air through ducts, heat exchangers, or filters.
3	Heating Element	1×	Electric booster heater
4	Refrigerant Line Set	1×	Extended suction and liquid lines tying the rear evaporator into the engine-driven compressor circuit.
5	HVAC Duct Set	1×	Molded ducting feeding ceiling and console vents along the cabin length.
6	Rear Climate Controller	1×	Cabin-mounted control head with temperature and fan setpoints for the rear zone.

3D model

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Build & assembly graph

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Bill of materials for Secondary HVAC System

6 top-level lines · 6 rows shown · 7 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Rear Evaporator Unit	limousine-rear-evaporator	1×	1	·	part
2	Blower Motor	blower-motor	2×	2	·	part
3	Heating Element	heating-element	1×	1	·	part
4	Refrigerant Line Set	limousine-refrigerant-lines	1×	1	·	part
5	HVAC Duct Set	limousine-hvac-duct-set	1×	1	·	part
6	Rear Climate Controller	limousine-climate-controller	1×	1	·	part

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Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳Foxconn foxconn.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Flex (Singapore) flex.com ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks
🇮🇳Dixon Technologies dixoninfo.com ↗	Noida, IN	Electronics contract mfg	1,000 pcs	6–10 wks
🇨🇳BYD Electronics bydelectronic.com ↗	Shenzhen, CN	Electronics contract mfg	1,000 pcs	6–10 wks
🇸🇬Venture Corp venture.com.sg ↗	Singapore	Electronics contract mfg	1,000 pcs	6–10 wks