Best Rinnai Home Thermostat Accessories in 2026

Protect again tampering, damage and unauthorized adjustment of thermostat settings.

Fits Honeywell Home thermostat families RTH8xxxx, RTH7xxxx, RTH6xxxx, RTH5xxxx, CT3x and other models measuring 6 1/16 W x 5 1/16 H x 2 5/8 D inches or smaller.

Actual size of thermostat guard: 6. 5" H x 7. 5" W x 3" D.

Protect again tampering, damage and unauthorized adjustment of thermostat settings.

Key lock with inner shelf to prevent tampering. You can mount this thermostat guard horizontally or vertically to fit your thermostat.

Clear plastic casing is chemical and UV resistant that resists yellowing.

Covers holes, paint marks, damage to the walls when your thermostat is replaced, or a smaller unit is installed.

Adaptor mounts to a single or double gang electrical box.

Kit includes one cover plate, electrical box adaptor and mounting screws.

The Small Thermostat Guard protects your thermostat and prevents others from tampering with your heating and cooling options. Fits Thermostats 4.375H x 4.375W inches or smaller

This easy-to-install cover includes a lock and key for complete control, as well as air vents for optimum thermostat performance.

The clear plastic casing is chemical and UV resistant that resists yellowing.

The C-Wire Power Adapter makes Honeywell Home smart thermostats compatible with most homes that don’t have a common wire.

Quickly and easily power connected thermostats that require a c-wire.

Use for Wi-Fi, 24v Honeywell Home thermostats when a common wire is needed but not present. Note, your home may have an unused C-Wire that should be verified before purchasing this adapter.

【PACKAGE INCLUDED】Our THP2400A1027W white coverplate assembly contains 2pcs cover plates (small and large), 1pc bracket and 4pcs screws. Large plate size: 6.81x5in, Large plate inner size: 1.81x2.17in; Small plate size: 5.51x4.33in, Small plate inner size: 1.81x2.17in. You can mount this cover plate directly to wall or a 2in x 4in electrical box.

【COMPATIBILITY】This THP2400A1027 thermostat wall plate is compatible with most Honeywell thermostats (such as RTH9585WF1004, TH9320WF5003, RTH9580WF, RTH6570E, RTH9585WF) and Prestige 2-Wire IAQ Thermostat. Please check whether the size is suitable before purchasing, the detailed size of the backplate is shown in our pictures.

【WALL PLATE FOR THERMOSTAT】If there's an unsightly mess left around your thermostat (holes in the drywalls, unpainted walls, etc.), I sincerely recommend you to try our thermostat wall cover. It can perfectly cover the defects on the walls, making your walls look more neat and beautiful.

Unique doublewall construction provides extra measure of tamperresistance.

Used in both new and existing applications.

Tamperresistant lock; key cannot be removed unless in locked position.

【PACKAGE INCLUDED】Our THP2400A1027W white coverplate assembly contains 4pcs cover plates (2pcs small and 2pcs large), 2pcs bracket and 8pcs screws. Large plate size: 6.81x5in, Large plate inner size: 1.81x2.17in; Small plate size: 5.51x4.33in, Small plate inner size: 1.81x2.17in. You can mount this cover plate directly to wall or a 2in x 4in electrical box.

【COMPATIBILITY】This THP2400A1027 thermostat wall plate is compatible with most Honeywell thermostats (such as RTH9585WF1004, TH9320WF5003, RTH9580WF, RTH6570E, RTH9585WF) and Prestige 2-Wire IAQ Thermostat. Please check whether the size is suitable before purchasing, the detailed size of the backplate is shown in our pictures.

【WALL PLATE FOR THERMOSTAT】If there's an unsightly mess left around your thermostat (holes in the drywalls, unpainted walls, etc.), I sincerely recommend you to try our thermostat wall cover. It can perfectly cover the defects on the walls, making your walls look more neat and beautiful.