{"product_id":"lennox-sl280uh090v48b-variable-speed-low-nox-gas-furnace-80-afue-4-ton","title":"Lennox SL280UH090V48B Variable Speed Low NOx Gas Furnace 80% AFUE 4 Ton","description":"\u003ch1\u003eLennox SL280UH090V48B Variable Speed Low NOx Gas Furnace 80% AFUE 4 Ton\u003c\/h1\u003e\n\u003cp\u003eThe \u003ca rel=\"noopener\" title=\"SL280UHV\" href=\"https:\/\/www.lennox.com\/dA\/64ad0e32e2\/ehb_sl280uhv_2407.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eLennox SL280V Series\u003c\/strong\u003e\u003c\/a\u003e serves as the high-efficiency \"airflow brain\" for your home’s heating and cooling system. This 80% AFUE variable-speed furnace is part of the elite Dave Lennox Signature Collection (DLSC), featuring a two-stage gas valve and a variable-speed blower motor. This combination allows the unit to modulate its output to maintain precise temperature control, reducing energy waste by running at a lower, quieter speed for the majority of the day. Specifically designed for \u003cstrong\u003eUpflow\/Horizontal\u003c\/strong\u003e installations, this 88,000 BTUH powerhouse provides the consistent 4-ton airflow capacity required to support high-efficiency air conditioners and heat pumps.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision OEM Logic:\u003c\/strong\u003e Controlled by a sophisticated integrated board that manages the variable-speed motor and two-stage gas valve for maximum indoor comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-Speed Blower Technology:\u003c\/strong\u003e Eliminates the \"blast\" of cold air at startup and significantly reduces electrical consumption compared to standard induction motors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcoustically Insulated Cabinet:\u003c\/strong\u003e Features a fully insulated heater compartment and a heavy-duty blower to provide whisper-quiet operation during both heating and cooling cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow NOx Compliance:\u003c\/strong\u003e Engineered with a specialized burner system to meet strict environmental standards, reducing nitrogen oxide emissions by up to 65%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Fuel Compatibility:\u003c\/strong\u003e Optimized to work seamlessly with electric heat pumps, automatically switching between gas and electric heat for the most cost-effective performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Lennox (Dave Lennox Signature Collection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Lennox Industries\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel #:\u003c\/strong\u003e SL280UH090V48B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\/SKU:\u003c\/strong\u003e 662551468249 \/ SL280UH090V48B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 152 Pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 115 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 88,000 BTUH Input \/ 71,000 BTUH Output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow:\u003c\/strong\u003e 4.0 Ton Capacity (1600 CFM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency:\u003c\/strong\u003e 80% AFUE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e Silicon Nitride Hot Surface Ignition (HSI)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eTake a Picture First!\u003c\/strong\u003e Before removing the old furnace, photograph the existing gas line, flue venting, and return air drop. The SL280V is a variable-speed unit; ensure your return ductwork is sized correctly for a 4-ton load (typically 20x25 or dual returns). \u003cstrong\u003eDiagnostic Check:\u003c\/strong\u003e After installation, verify the \"Dip Switch\" settings on the control board. If these aren't set to match your outdoor AC unit's tonnage, the variable-speed motor may not ramp up to the proper CFM, leading to frozen evaporator coils or poor dehumidification.\u003c\/p\u003e\n\u003ch2\u003eCross-Reference\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded \/ Legacy:\u003c\/strong\u003e G60UHV, G60UH, SL280UH090V48A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Equivalents:\u003c\/strong\u003e Armstrong Air A802V, AirEase A802V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries Code:\u003c\/strong\u003e DLSC (Dave Lennox Signature Collection)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther Identifiers:\u003c\/strong\u003e 80% Variable Speed, Low NOx 88k BTUH\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModel Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSL280V Series\u003c\/strong\u003e (Suffixes: UH070V36A, UH090V48B, UH090V60C, UH110V60C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC35\/CX35 Coils\u003c\/strong\u003e (Suffixes: 48B, 49B, 50\/60C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS30\/E30 Controls\u003c\/strong\u003e (Suffixes: iComfort Smart Thermostats)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHealthy Climate\u003c\/strong\u003e (Suffixes: PCO3, HEPA, Carbon Clean 16)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUser manuals\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/s7d9.scene7.com\/is\/content\/lennoxinternational\/210600-37-000\" title=\"Product Specifications\" target=\"_blank\"\u003eProduct Specifications\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/s7d9.scene7.com\/is\/content\/lennoxinternational\/508245-01-000\" title=\"Installation Instructions\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":52451505733995,"sku":"SL280UH090V48B","price":1514.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/SL280UH090V48B.jpg?v=1773335213","url":"https:\/\/tophvacparts.com\/products\/lennox-sl280uh090v48b-variable-speed-low-nox-gas-furnace-80-afue-4-ton","provider":"HVAC Parts and Equipment Depot","version":"1.0","type":"link"}