Lennox 39P21 Universal Thermostat Guard

Protect your thermostat from tampering, damage, and unauthorized adjustments with the durable and versatile 39P21 Universal Thermostat Guard—perfect for both new installs and retrofit applications.

Features:

• Unique double-wall construction provides extra measure of tamper-resistance.
• Used in both new and existing applications.
• Tamper-resistant lock; key cannot be removed unless in locked position.
• All models mount vertically or horizontally on wall or exposed junction box.
• Vents in guard base allow airflow for optimum thermostat performance.
• Outside Dimensions: (HxWxD) 7-1/4″ (184mm) x 9-3/4″ (248mm) x 3-3/8″(86mm)
• Inside Dimensions: (HxW) 5-7/8″ (149mm) x 8-3/8″(213mm)