{"product_id":"saihisday-under-dash-universal-12v-evaporator-heater-core-4-vents-22-pass-coil-compact-retrofit","title":"Saihisday Under-Dash Universal 12V Evaporator\/Heater Core — 4 Vents, 22-Pass Coil (Compact Retrofit)","description":"\u003cstrong\u003eSaihisday's 12V under-dash evaporator assembly is a universal air-conditioning core that adds refrigerated cooling and heating airflow to vehicles that originally lacked factory A\/C.\u003c\/strong\u003e\n\n\u003cp\u003eIf you want to retrofit an older car, truck, or custom vehicle with climate control, this compact Saihisday evaporator\/heater unit supplies both cooling and heat through four directional vents and a 22-pass coil design. The assembly runs on 12V at 7.6A, pairs with external compressors and condensers, and is built for integration beneath the dash rather than direct bolt-in replacement. It’s sold as the evaporator\/heater core only — mounting and refrigerant plumbing are part of the install process.\u003c\/p\u003e\n\n\u003ch3\u003eHow much cooling and heating performance does this unit deliver?\u003c\/h3\u003e\n\u003cp\u003eThe unit provides substantial thermal capacity for a compact under-dash core: roughly 4,107 kcal\/h cooling (about 16,297 BTU) and 3,619 kcal\/h heating (about 14,360 BTU). Its 22-pass, four-way coil and blower design optimize airflow through the cabin when matched with a suitable condenser and compressor.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCooling capacity: 4107 kcal\/h (≈16,297 BTU)\u003c\/li\u003e\n  \u003cli\u003eHeating capacity: 3619 kcal\/h (≈14,360 BTU)\u003c\/li\u003e\n  \u003cli\u003ePower draw: 12V, 7.6A with electrical thermostat control\u003c\/li\u003e\n  \u003cli\u003e22-pass coil for increased heat exchange and airflow\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does “universal” mean and will it fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eUniversal indicates the core is designed to be adaptable to many dashboards rather than being a model-specific, bolt-in part. It is intended for custom installation projects where the evaporator is mounted under the dash and connected to an aftermarket compressor, condenser, hoses, and controls.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNot a direct OEM replacement — custom mounting and brackets usually required\u003c\/li\u003e\n  \u003cli\u003eRequires external refrigeration components and professional or skilled DIY installation\u003c\/li\u003e\n  \u003cli\u003eWorks best in older vehicles or custom builds that lacked factory A\/C\u003c\/li\u003e\n  \u003cli\u003eElectrical thermostat included for temperature regulation, integrates with vehicle 12V system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat do I need to install this evaporator assembly?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires basic HVAC components and some fabrication: a compatible compressor and condenser, refrigerant lines, expansion valve\/orifice, receiver\/drier or accumulator, and wall fittings or bulkhead ports through the firewall. Proper evacuation and refrigerant charging must be performed to system specifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket compressor and condenser matched to cooling capacity\u003c\/li\u003e\n  \u003cli\u003eRefrigerant lines, fittings, expansion device, and drier\/accumulator\u003c\/li\u003e\n  \u003cli\u003eMounting brackets or custom under-dash support and vent routing\u003c\/li\u003e\n  \u003cli\u003eTools for evacuation, charging, and leak testing — or professional HVAC service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the user interface and airflow work on this unit?\u003c\/h3\u003e\n\u003cp\u003eThe assembly routes conditioned air through four directional vents allowing targeted distribution across the cabin. Fan speed and temperature are controlled via a 12V electrical thermostat and the blower; airflow patterns depend on ducting and vent orientation chosen during installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour-way vents allow directional airflow to driver and passengers\u003c\/li\u003e\n  \u003cli\u003eElectrical thermostat provides temperature regulation on 12V systems\u003c\/li\u003e\n  \u003cli\u003eAirflow effectiveness depends on duct layout and vent placement\u003c\/li\u003e\n  \u003cli\u003eDesigned for under-dash mounting to keep instrument panel clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Saihisday universal evaporator assembly is aimed at car and truck owners, custom builders, and restoration specialists who want to add factory-style A\/C and heating to vehicles without original equipment. It’s ideal for those comfortable planning or overseeing a retrofit — including selecting a matched compressor, condenser, and fittings — or for professional installers seeking a compact, high-capacity under-dash core for custom systems.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this evaporator a direct bolt-in replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. It’s a universal under-dash core meant for custom installation, not a direct OEM bolt-in part.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the unit include a compressor and refrigerant?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The listing is for the evaporator\/heater assembly only; compressor, condenser, lines, and refrigerant are sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Saihisday","offers":[{"title":"Default Title","offer_id":48081433723038,"sku":"B0BP9X5CGG","price":150.43,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/saihisday-front-unit-under-dash-assembly.jpg?v=1785804237","url":"https:\/\/northtrailauto.ca\/products\/saihisday-under-dash-universal-12v-evaporator-heater-core-4-vents-22-pass-coil-compact-retrofit","provider":"North Trail Auto","version":"1.0","type":"link"}