{"product_id":"hln-aerolyn-4000-pro-fahrenheit-wifi-controller-air-diesel-heater-12v-40f-vehicle-original-equipment-installation-kits-included","title":"HLN Aerolyn 4000 PRO Fahrenheit WiFi Controller Air Diesel Heater 12v -40F, Vehicle Original Equipment; Installation Kits, Included","description":"\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/9rTGlXZqijY?si=lNjPyfaT-GyuqXEG\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/zH2FKK0NTnQ?si=nhC0jK53417W6OjX\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"a-list-item\"\u003eFor the past 50 years, HLN has been the factory pre-installed diesel heater provider for manufacturers of trucks, construction vehicles and buses, many of whom rank among top 10 in the world by sales volumes.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eAll the diesel heaters are E-mark certified and widely used on vehicles operating in Europe, Mid-East, Asia-Pacific and Americas.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eThis Pro version of heater has automatic altitude adjustment function and is capable of operating at 5,000m \/ 16,000ft height.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eThis Pro version has brussless fan motor that can operate for more than 5,000 hours.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\n\u003cspan class=\"a-list-item\"\u003eThis Pro version has integrated intake and exhaust mufflers.\u003c\/span\u003e\u003cspan class=\"a-list-item\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\u003cspan class=\"a-list-item\"\u003eWifi controller with phone APP allows you to control your heater wherever you want\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eThe phone APP is called SmartLife \u003cspan class=\"a-list-item\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eInternal thermo sensor built in the controller; external thermo sensor optional\u003cspan class=\"a-list-item\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eController works to -40\u003cspan\u003e°C\u003c\/span\u003e\/\u003cspan\u003e°\u003c\/span\u003eF\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"a-list-item\"\u003e\u003cspan\u003eTemperature in Fahrenheit for the US, in Celsius elsewhere \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"a-list-item\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003e\n\u003cspan class=\"a-list-item\"\u003e\u003c\/span\u003eHeating capacity (kW): 1-3.5\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003eFuel consumption (l\/h): 0.12-0.43\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003eWeight (kg): 4.5\u003c\/li\u003e\n\u003cli class=\"a-spacing-mini\"\u003eOutline dimensions (L*W*H) (mm): 388*141*150\u003c\/li\u003e\n\u003cli\u003e5 meter \/ 16 ft white fuel line with protective cover, ID 2mm\/OD 4mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c!----\u003e\n\u003cdiv class=\"geo-product-description\"\u003e\n\u003cp\u003eThe HLN Aerolyn 4000 PRO is a 4kW diesel air heater built for larger RVs, trucks, motorhomes, and buses. It delivers twice the heating output of the 2000 PRO model and can warm spaces up to 40 cubic meters in temperatures as low as -40°F (-40°C).\u003c\/p\u003e\n\u003cp\u003eThis heater is engineered to the same OEM standard that HLN's manufacturing line has supplied to Fortune Global 500 vehicle manufacturers across 50 years of production. It carries E-mark certification under ECE R122, the safety standard required for commercial vehicle heating systems in Europe and internationally.\u003c\/p\u003e\n\u003ch3\u003eHighest altitude rating in its class\u003c\/h3\u003e\n\u003cp\u003eThe 4000 PRO features automatic altitude adjustment up to 16,000 feet (5,000 meters) — the highest rating in its class. This makes it suitable for high-altitude construction sites, mountain passes, and ski resort areas without performance degradation. The brushless motor is rated for over 5,000 hours of continuous operation.\u003c\/p\u003e\n\u003ch3\u003eSmart control from your phone\u003c\/h3\u003e\n\u003cp\u003eControl options include a WiFi digital panel with SmartLife phone app connectivity. The app lets you remotely start the heater, set temperatures, and create weekly schedules. A Bluetooth controller is also available. Both options include thermostat control with auto and manual modes.\u003c\/p\u003e\n\u003ch3\u003eComplete installation kit included\u003c\/h3\u003e\n\u003cp\u003eThe heater ships with a complete installation kit and is compatible with Espar\/Eberspacher ultra-quiet fuel pumps. No additional parts are needed for a full installation.\u003c\/p\u003e\n\u003cp\u003ePriced at $699 including the installation kit, the 4000 PRO offers 4kW of OEM-grade heating at a fraction of the cost of comparable Webasto Airtop or Espar Airtronic units.\u003c\/p\u003e\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cp\u003eLarge RVs, motorhomes, trucks, buses, construction vehicle cabs, and overlanding vehicles that need powerful cabin heating in extreme cold and at high elevations.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating power:\u003c\/strong\u003e 4kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e -40°F to 120°F (-40°C to 50°C)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAltitude:\u003c\/strong\u003e automatic adjustment up to 16,000 ft (5,000 m)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e brushless, 5,000+ hour rated lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eController:\u003c\/strong\u003e WiFi (SmartLife app) or Bluetooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel:\u003c\/strong\u003e diesel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel pump:\u003c\/strong\u003e compatible with Espar\/Eberspacher ultra-quiet pumps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e E-mark (ECE R122)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e complete installation kit, controller, mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eCertification\u003c\/h3\u003e\n\u003cp\u003eE-mark type approved: \u003cstrong\u003eECE R122\u003c\/strong\u003e (vehicle heating systems), approval no. E13*122R00\/06*0310*00, and \u003cstrong\u003eECE R10\u003c\/strong\u003e (electromagnetic compatibility), approval no. E13*10R06\/01*16437*00. Issued by SNCH (Luxembourg). Verifiable in the UNECE type-approval database.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003eHow loud is it?\u003c\/h4\u003e\n\u003cp\u003eThis exact model was bench-tested by an independent reviewer who titled the video \"The Quietest Diesel Heater I've Ever Tested.\" Measured one foot from the hot-air outlet — bare, uninstalled, in a 40 dB room — it registered 55 dB on low and 65 dB on high; he described the sound as \"a very pleasant white noise\" he could sleep to, and noted a passing car was louder. Installed (heater in a cabinet or under the floor, pump mounted remotely, intake\/exhaust outside), typical in-cabin noise is around 45 dB.\u003c\/p\u003e\n\u003ch4\u003eWhen should I choose 4kW over 2kW?\u003c\/h4\u003e\n\u003cp\u003ePick the 4000 PRO for spaces over ~20 m³, poorly insulated builds, box trucks, larger boats, or anywhere temperatures regularly hit -20°F and below. It heats the same space faster and cruises at lower power — quieter and gentler on the battery than a 2kW working flat out.\u003c\/p\u003e\n\u003ch4\u003eWill it be too much heat for a van?\u003c\/h4\u003e\n\u003cp\u003eNo — it modulates down automatically. Oversizing slightly is better than undersizing: the heater simply runs at low output more of the time.\u003c\/p\u003e\n\u003ch4\u003eHow much fuel and power does it use?\u003c\/h4\u003e\n\u003cp\u003eIndependent testing measured 23 g of diesel per 10 minutes on low and 43 g on high — roughly one gallon per 24 hours of continuous low running, two gallons on high, as an absolute worst case with no thermostat cycling. Average electrical draw: about 0.75 A on low and 3.2 A on high at 12V.\u003c\/p\u003e\n\u003ch4\u003eDoes it work at high altitude?\u003c\/h4\u003e\n\u003cp\u003eYes — automatic compensation up to 16,000 ft (5,000 m) per the spec sheet. Nothing to adjust.\u003c\/p\u003e\n\u003ch4\u003eIs it certified?\u003c\/h4\u003e\n\u003cp\u003eYes — E-mark certified under ECE R10 and R122 (approval numbers above), plus CE marking. Certification documents are on our Download page and verifiable in the UNECE database.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How loud is the HLN Aerolyn 4000 PRO?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"An independent reviewer bench-tested this model and titled the video 'The Quietest Diesel Heater I've Ever Tested.' Bare and uninstalled, measured one foot from the hot-air outlet in a 40 dB room, it registered 55 dB on low and 65 dB on high. Installed in a vehicle, typical in-cabin noise is around 45 dB.\"}},{\"@type\":\"Question\",\"name\":\"When should I choose a 4kW diesel heater over 2kW?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Choose 4kW for spaces over about 20 cubic meters, poorly insulated builds, box trucks, larger boats, or temperatures regularly below -20°F. It heats faster and cruises at lower power, which is quieter and easier on the battery.\"}},{\"@type\":\"Question\",\"name\":\"Is 4kW too much heat for a van?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The heater modulates its output down automatically; slight oversizing simply means it runs at low power more of the time.\"}},{\"@type\":\"Question\",\"name\":\"How much fuel does the HLN 4000 PRO use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Independent testing measured roughly one gallon of diesel per 24 hours of continuous low running and two gallons on high — worst case with no thermostat cycling. Average electrical draw is about 0.75 A on low and 3.2 A on high at 12V.\"}},{\"@type\":\"Question\",\"name\":\"Does the HLN 4000 PRO work at high altitude?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — automatic altitude compensation up to 16,000 ft (5,000 m). No manual adjustment needed.\"}},{\"@type\":\"Question\",\"name\":\"Is the HLN 4000 PRO certified?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, E-mark certified under ECE R10 and R122 plus CE marking, with approval numbers published on the product page and verifiable in the UNECE type-approval database.\"}}]}\u003c\/script\u003e","brand":"HLN Diesel Heaters","offers":[{"title":"Default Title","offer_id":60061975969873,"sku":"4KW-PRO-12V-CAR-HEATER-WIFI","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0689\/2489\/9409\/files\/2_4_kw_air_with_controller_wifi-set.jpg?v=1786796982","url":"https:\/\/openroadsupplycompany.com\/products\/hln-aerolyn-4000-pro-fahrenheit-wifi-controller-air-diesel-heater-12v-40f-vehicle-original-equipment-installation-kits-included","provider":"Open Road Supply Co.","version":"1.0","type":"link"}