521237 Suburban Blower Housing Kit 

SF-20/25/30/35 Q FQ

KIT FRONT BLOWER/SCREWS

The Suburban 521237 Blower Housing Kit is the OEM front blower housing used on the SF‑series Q and FQ furnaces. This housing supports the blower motor and wheel alignment, ensuring proper airflow and quiet operation. The included screws match the factory thread pitch and mounting pattern, preventing vibration and blower‑wheel rub.

This kit is not the one‑piece SFVH housing (that’s 521259). It is the correct housing for the standard SF Q/FQ furnaces.

What this housing kit provides

• Correct alignment for blower motor and blower wheel

• Maintains proper airflow for SF‑series Q/FQ combustion systems

• Reduces vibration and blower noise

• OEM‑matched mounting points and geometry

• Includes correct screws for secure installation

When technicians replace this housing

• Cracked or heat‑warped blower housing

• Stripped or broken motor‑mount screw holes

• Blower wheel scraping due to misalignment

• Damage during blower motor removal

• Restoring airflow performance on older SF Q/FQ furnaces

Compatibility

SF‑Series Furnaces (Standard Q/FQ Models)

• SF‑20Q / SF‑20FQ

• SF‑25Q / SF‑25FQ

• SF‑30Q / SF‑30FQ

• SF‑35Q / SF‑35FQ

This is the correct OEM front blower housing kit for all standard SF Q/FQ furnaces.