Bosch 8733980509 Mini-split 18000 Btu 2-zone System

Product Description

The BOSCH 8733980509 is an 18,000 BTU multi-zone ductless mini-split system configured for two indoor zones. The kit includes one 9,000 BTU indoor unit and one 12,000 BTU indoor unit paired with a single outdoor condensing unit. It is designed for residential or light-commercial applications where independent temperature control across two spaces is required. Licensed HVAC technicians install and commission this type of system, covering refrigerant line set connections, electrical rough-in, and system startup. The kit ships as a matched set, with all three units — two indoor air handlers and one outdoor unit — sourced from the same equipment family to ensure system compatibility and proper capacity balance.

This multi-zone mini-split kit suits applications such as split-level homes, additions, garage conversions, or any two-room installation where a shared outdoor unit is preferred over individual single-zone systems. The 9,000 BTU indoor unit addresses smaller spaces while the 12,000 BTU indoor unit covers mid-sized rooms. Both zones operate independently, allowing occupants to set different temperatures in each area. No line set is included with this kit, so line set lengths and diameters must be sized per the equipment specifications during installation planning.

Key Features

• 18,000 BTU total system capacity split across two independent zones
• Includes one 9,000 BTU indoor unit (part 8733962672) and one 12,000 BTU indoor unit (part 8733962673)
• Matched outdoor condensing unit (part 8733962699) included in the kit
• Ductless design eliminates the need for duct infrastructure in conditioned spaces
• Line sets not included — field-supplied and field-sized per installation requirements

Compatibility

This kit contains matched components: indoor unit 8733962672 (9,000 BTU), indoor unit 8733962673 (12,000 BTU), and outdoor unit 8733962699. These units are factory-paired as a set. Substituting individual components from outside this matched configuration is not supported by this kit listing.

Installation Notes

Installation must be performed by a licensed HVAC technician holding an EPA Section 608 certification, as the system contains regulated refrigerant. Power to the installation area must be disconnected at the breaker before any electrical work begins. Line set sizing, flare connections, and evacuation procedures should follow the equipment manufacturer guidelines and applicable local mechanical codes. Do not operate the system without completing a proper vacuum pull-down and verifying refrigerant charge per the outdoor unit nameplate requirements.

Technical Specifications

• System Capacity: 18,000 BTU
• Zone Count: 2
• Indoor Unit 1 Capacity: 9,000 BTU
• Indoor Unit 2 Capacity: 12,000 BTU
• Indoor Unit 1 Part Number: 8733962672
• Indoor Unit 2 Part Number: 8733962673
• Outdoor Unit Part Number: 8733962699
• Kit Net Weight: 183.65 pounds
• Kit Gross Weight: 242.45 pounds
• UPC: 52575024097

Standard Information

• Brand: BOSCH
• Manufacturer Part Number: 8733980509