Ademco Inc CT87K1004/E1 Round Heat Only Thermostat

Product Description

The ADEMCO INC CT87K1004/E1 is a round, heat-only thermostat designed for residential heating systems. It controls temperature without the use of mercury, making it a compliant choice for jurisdictions with mercury-free requirements. The unit features a decorative cover ring that conceals wall marks left by previous thermostats, allowing for a clean installation appearance. This thermostat is intended for straightforward low-voltage heating applications and is installed by HVAC technicians or qualified service professionals handling system control replacements.

This thermostat is suited for residential forced-air heating systems and hydronic systems that operate on a standard heat-only control circuit. It is not compatible with heat pump systems. The round form factor is a common replacement profile for older round thermostats found in residential settings, making it a practical option for direct swap installations in existing heating systems.

Key Features

• Mercury-free design meets modern environmental compliance standards
• Heat-only operation for standard residential heating systems
• Round form factor suited for direct replacement of similar round thermostats
• Decorative cover ring conceals existing wall marks from prior thermostat mounting
• Precise temperature control for consistent heating performance
• Does not work with heat pump systems

Compatibility

Designed as an OEM-style replacement for residential heat-only low-voltage thermostat applications. Not compatible with heat pump systems.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage thermostat wiring and local mechanical codes. Power down the heating system at the breaker or disconnect before removing the existing thermostat. Verify the system is heat-only and does not include a heat pump configuration before installing this unit. Follow all applicable local codes and manufacturer wiring diagrams during installation.

Technical Specifications

• Weight: 2.25 pounds
• Unit of Measure: EA
• Package Quantity: 3

Standard Information

• Brand: ADEMCO INC
• Manufacturer Part Number: CT87K1004/E1