White-Rodgers F29-0227 Guard

Commercial contractors and facility managers rely on the White-Rodgers F29-0227 to prevent unauthorized temperature adjustments and maintain HVAC system integrity. This clear plastic thermostat guard provides a high-visibility, tamper-resistant solution for public environments such as offices, churches, and retail spaces. Engineered for maximum versatility, the F29-0227 comes equipped with both a solid wall mounting plate and a ring base, allowing for a professional fit over existing low-voltage thermostats or new installations. It is technically identical to the 190-050 and AT-1155 crosses, ensuring compatibility across a wide range of legacy and modern Emerson/White-Rodgers 1C, 1D, 1E, and 1F series controllers. The high-impact plastic housing is vented to allow for unrestricted airflow, ensuring the protected device accurately senses ambient room temperature. Whether mounted in a horizontal or vertical orientation, the included key-lock mechanism provides secure access only to authorized service personnel.

• Universal Compatibility: Includes both solid and ring bases to fit a broad spectrum of White-Rodgers and Emerson thermostats.
• Enhanced Visibility: Clear, high-impact plastic construction allows for easy setpoint monitoring without removing the cover.
• Flexible Installation: Designed for either vertical or horizontal mounting to accommodate various wall configurations.
• Tamper Prevention: Heavy-duty locking mechanism prevents unwanted setpoint manipulation and reduces energy waste in commercial zones.
• Standardized Cross-Reference: Direct replacement for part numbers 190-050 and AT-1155.

What are the internal dimensions of this guard?
With the solid base, the internal dimensions are approximately 5-1/4" L x 4-5/8" H x 3" D. Using the ring base increases the usable depth to 3-1/4".

Can I use this for non-White-Rodgers thermostats?
Yes, provided the dimensions of the competing thermostat fall within the internal footprint. It is commonly used as a universal large-format guard for various 24V control brands.

Does this kit include more than one key?
The standard F29-0227 kit is furnished with one key. Replacement locks and additional keys (F145-0999) are available if multiple access points are required.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.