Product Information
Air limiter
Compatible with 7 equipment models
- KBR21 Bosch Greenstar KBR21 Floor Boiler
- KBR28 Bosch Greenstar KBR28 Floor Boiler
- KWB28 Bosch Greenstar KWB28 Floor Boiler
- ZBR21 Bosch Greenstar ZBR21 Wall Boiler
- ZBR28 Bosch Greenstar ZBR28 Wall Boiler
- ZWB28 Bosch Greenstar ZWB28 Wall Boiler
- ZWB28-3A Bosch Greenstar Pro ZWB28-3A Wall Boiler
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Fast Shipping
In-stock orders ship within 1 business day to anywhere in Canada.
Code-Compliant
All products meet Canadian HVAC and gas code standards.
Wholesale Pricing
Trade pricing for licensed contractors. 40+ years in the industry.
The Bosch Air Limiter (Bosch Parts) is a compact service and replacement component used to limit or balance airflow in HVAC and air‑handling systems, helping technicians achieve targeted air distribution and reduce stress on downstream equipment during commissioning and service. I could not find an official Bosch North America listing for part number 87105052120 on bosch-homecomfort or bosch-climate; this description is therefore based on the part name and category—please provide a datasheet or alternate part number for a model-specific specification.
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