Honeywell T822K1000 Thermostat

As an HVAC professional, you know the value of a dependable, "no-frills" mechanical control for standard 24V heating systems. The Honeywell T822K1000 is an industry-standard, non-programmable low voltage thermostat designed specifically for 1-heat-only applications. This vertical mount thermostat features a precision snap-action switch and a bimetal sensor element, providing high reliability for gas, oil, or electric heat systems, as well as heat pump compatibility (heat only) and specialized 250/500/750 mV millivolt circuits.

Replacing the older 100-402 or mercury-based Econostat models, the Honeywell T822K1000 offers an adjustable heat anticipator from 0.18 to 1.0A to ensure tight cycle control and improved system efficiency. Its SPST switching action and rugged bimetal construction make it ideal for rental properties, garages, or shops where simplicity and durability are paramount. The ventilated Premier White cover allows for optimal airflow across the sensing element, ensuring temperature accuracy within +/- 2 degrees Fahrenheit across its 45?F to 95?F setting range.

• Universal 24V Compatibility: Works seamlessly with gas, oil, electric, and gravity-fed heating systems.
• Precision Control: Features a snap-action switch that eliminates the need for leveling, unlike older mercury-based units.
• Adjustable Anticipation: Integrated heat anticipator allows for fine-tuning based on the specific current draw of your primary control.
• Simplified Installation: Standard R and W terminal designations for rapid field replacement of existing Honeywell thermostats.
• Mercury-Free Design: Modern solid-state/mechanical hybrid approach that meets all environmental regulations for residential HVAC controls.

Is the Honeywell T822K1000 compatible with millivolt systems?
Yes, this unit is rated for millivolt applications, making it a versatile choice for floor furnaces and wall heaters that do not have a dedicated 24V transformer.

Does this thermostat require batteries?
No, as a purely mechanical non-programmable thermostat, it operates without batteries, drawing its power directly from the 24V or millivolt control circuit.

Can I use this for a cooling system?
No, the T822K1000 is a heat-only thermostat with a fixed "Heat/Off" system switch. For heating and cooling applications, a multi-stage or heat/cool model is 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.