{"product_id":"ademco-inc-ct87k1004-e1-round-heat-only-thermostat","title":"Ademco Inc CT87K1004\/E1 Round Heat Only Thermostat","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMercury-free design meets modern environmental compliance standards\u003c\/li\u003e\n  \u003cli\u003eHeat-only operation for standard residential heating systems\u003c\/li\u003e\n  \u003cli\u003eRound form factor suited for direct replacement of similar round thermostats\u003c\/li\u003e\n  \u003cli\u003eDecorative cover ring conceals existing wall marks from prior thermostat mounting\u003c\/li\u003e\n  \u003cli\u003ePrecise temperature control for consistent heating performance\u003c\/li\u003e\n  \u003cli\u003eDoes not work with heat pump systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement for residential heat-only low-voltage thermostat applications. Not compatible with heat pump systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation 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.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.25 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: EA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ADEMCO INC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: CT87K1004\/E1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RESIDEO","offers":[{"title":"Default Title","offer_id":51524831871282,"sku":"CT87K1004\/E1","price":131.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8af258f0b367ed5dcea716d1f4f99233.jpg?v=1785458927","url":"https:\/\/voomisupply.com\/products\/ademco-inc-ct87k1004-e1-round-heat-only-thermostat","provider":"Voomi Supply","version":"1.0","type":"link"}