{"product_id":"velit-4000p-pro-gasoline-air-heater-14000btu-4000w-12v","title":"VELIT 4000P Pro Gasoline Air Heater - 14000BTU 4000W - 12V","description":"\u003cp\u003eThe VELIT 4000P Pro is a 12V gasoline air heater with VELIT’s Lambda AFR combustion monitor included. Official heating capacity is 5600–14000 BTU (4000W heat output). It is the same 4000P gasoline heater as the Standard model, with the Lambda AFR in the box.\u003c\/p\u003e\n\u003cp\u003eLambda AFR is an oxygen sensor and display that read the heater’s exhaust and show how well it is burning. Lower readings mean rich (too much fuel) and higher readings mean lean (too much air). On a compatible VELIT heater with 6.X firmware, the included heater harness connects to the heater’s Auxiliary Port so the heater can correct its own fueling. The sensor powers on automatically when the heater starts, and the thermostat periodically shows live lambda values while the heater runs.\u003c\/p\u003e\n\u003cp\u003eSee also the \u003ca href=\"\/products\/velit-4000p-gasoline-air-heater-14000btu-4000w-12v\"\u003eVELIT 4000P Gasoline Air Heater (Standard)\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVELIT Lambda AFR included:\u003c\/strong\u003e Real-time lambda monitoring and rich\/lean diagnosis from the exhaust. It can also be used for installation checks, pre-season health checks, and maintenance diagnosis, and as a standalone monitor with the included 12V cigarette-lighter harness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.X firmware and Auxiliary Port required:\u003c\/strong\u003e Closed-loop AFR control, automatic altitude compensation, Smart Priming, and Smart Ignition require a compatible VELIT heater with 6.X firmware. The included heater harness connects to the heater’s Auxiliary Port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed-loop AFR control:\u003c\/strong\u003e With 6.X firmware, the heater continuously adjusts fueling for stable, clean combustion. VELIT lists improved efficiency and stability, reduced carbon buildup, and longer service intervals among the benefits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic altitude compensation:\u003c\/strong\u003e With 6.X firmware, the heater adapts to changing combustion conditions at elevation. The 4000P already adjusts the air-fuel mix from barometer data; the sensor adds a measured check on top.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Priming:\u003c\/strong\u003e With 6.X firmware, in Prime Mode the heater watches combustion through the sensor and stops priming once ignition is detected, which helps prevent unnecessary fuel buildup and reduces the risk of over-fueling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Ignition:\u003c\/strong\u003e With 6.X firmware, during startup the heater monitors combustion and adjusts fueling to help it light. VELIT lists faster, more reliable starts, better cold-weather performance, fewer ignition failures, and better tolerance of a partly lost prime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasoline lambda target:\u003c\/strong\u003e 1.2–1.8. Too rich can mean carbon buildup, soot, black smoke, and shorter service intervals; too lean can mean unstable combustion, hard starting, and flameout risk. Wait at least five minutes after starting the heater or changing its power setting before reading it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart thermostat included:\u003c\/strong\u003e VELIT states that a smart thermostat now comes standard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in safety shutoff sensors:\u003c\/strong\u003e Equipped with built-in carbon monoxide and flammable gas sensors, the heater automatically shuts off in case of a leak or dangerous gas accumulation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-elevation performance:\u003c\/strong\u003e Tested in Colorado at 11,000 ft +, the heater adjusts the air-fuel mix ratio based on elevation data from its barometer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth connectivity:\u003c\/strong\u003e Control the heater from up to 100 feet away using a smartphone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProprietary combustion chamber:\u003c\/strong\u003e Combined with a high-volume fuel pump, as described by VELIT, to support heater output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete installation kit:\u003c\/strong\u003e VELIT states the kit includes everything needed for installation, including the auxiliary fuel port connector for Sprinter, Transit, and ProMaster vans, plus a cleaning straw.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable components:\u003c\/strong\u003e VELIT specifies a Japanese glow plug and a weather-sealed controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Two-year limited warranty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot a carbon monoxide alarm:\u003c\/strong\u003e Lambda AFR reads combustion quality, not cabin air, and is not a replacement for a cabin carbon monoxide alarm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot sensor:\u003c\/strong\u003e The adapter and sensor get extremely hot in use. Allow them to cool before handling. The sensor has an internal heating element and should not be run in free air for more than 30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper installation still matters:\u003c\/strong\u003e The adaptive system can partly compensate for installation-related issues, but it does not replace proper fuel, intake, and exhaust installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 4000P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial model option:\u003c\/strong\u003e Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e GAS4000Lam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating capacity:\u003c\/strong\u003e 5600–14000 BTU (4000W heat output)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel consumption:\u003c\/strong\u003e 0.053–0.14 gal\/h\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating power:\u003c\/strong\u003e 20–40 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStarting power:\u003c\/strong\u003e \u0026lt;120 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e −40°F to 75°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating elevation:\u003c\/strong\u003e Up to 16,000 ft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 14.6 in × 5.5 in × 5.9 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 10 lb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLambda input voltage:\u003c\/strong\u003e 10–15 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLambda display range:\u003c\/strong\u003e 0.8–2.2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasoline lambda target:\u003c\/strong\u003e 1.2–1.8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVELIT Lambda integration:\u003c\/strong\u003e Auxiliary Port; 6.X firmware required for closed-loop AFR control, automatic altitude compensation, Smart Priming, and Smart Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Two-year limited warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHeater specifications are from VELIT’s official heater specs page and 12V documentation. Lambda specifications are from VELIT’s Lambda AFR documentation.\u003c\/p\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cp\u003eThe Pro includes the official 4000P installation kit, plus VELIT’s Lambda AFR. The Lambda AFR includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHeated oxygen sensor\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLambda \/ AFR analyzer module\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSensor adapter\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVELIT heater harness\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e12V cigarette-lighter power harness\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRubber L-joint\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eInstallation hardware\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe official 4000P kit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart thermostat:\u003c\/strong\u003e Included; VELIT states it now comes standard.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePhysical manual\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e75 mm outlet hose\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIntake hose\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eExhaust pipe\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFuel pickup tube\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIntake filter\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFuel pump mounting bracket\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSealing bracket\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eAir diffuser\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMounting plate\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e16 ft fuel line\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFuel pump connector\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFuel filter\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e65 ml fuel pump\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMounting clamp, outlet clamp, intake\/exhaust clamp, and fuel line clamp\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSelf-tapping fasteners, fuel pump bolt, mounting bolt and nut, zip ties, and fuel line connectors\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.89-ID3 fuel tank connector:\u003c\/strong\u003e For ProMaster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.30-ID3 fuel tank connector:\u003c\/strong\u003e For Transit and Sprinter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaning straw:\u003c\/strong\u003e Listed on VELIT’s product page\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Velit","offers":[{"title":"Default Title","offer_id":67864228200616,"sku":"GAS4000Lam","price":949.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0688\/8656\/0810\/files\/velit-4000p-gasoline-air-heater.jpg?v=1794382701","url":"https:\/\/hightopvanshop.com\/products\/velit-4000p-pro-gasoline-air-heater-14000btu-4000w-12v","provider":"High Top Van Shop","version":"1.0","type":"link"}