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Longroadaccess Air 4D
AUTOTERM Air 4D (Planar) 4 kW Diesel Air Heater 12V with PU-5 controller Similar to Webasto, Airtronic, Eberspacher, Espar for car, cabin, boat, bus, camper - universal kit! PLUS Vest
Only 5 left in stock - order soon.
A 4.0 kW Autoterm (Planar) split heater with the highest air flow listed at 168 m³/h, adjustable from 1.0 kW and burning 0.12 to 0.51 L/h. It is the only heater in the table with ECE R122 and ECE R10 approvals and is rated to -49 ℉. At 11.90 lbs and 57 W it is larger than the 2 kW premium units, and its 8,202 ft altitude limit suits larger vans and trucks heated at moderate elevations.
- Price
- $1,299.99
- Brand
- Longroadaccess
Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.
Ranking within Category
Comparing this product to others on Nomad Gear Finder (in the diesel heaters category with a value specified):
- Max heat output 4.0 kW Lower than 84% of 59 others
- Running power draw 57 W Higher than 90% of 11 others
- Weight 11.90 lbs 5.40 kg Lower than 86% of 29 others
- Max operating altitude 8,202 ft Lower than 97% of 36 others
- Max operating altitude (m) 2,500 m Lower than 94% of 37 others
- Operating temp min -49 ℉ -45 ℃ Lower than 96% of 25 others
Related Videos
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Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.
- Model
- Air 4D
- User manual
- Link
- Popular brand
- No
Core specs
- Heater type
- Split
- Max heat output
- 4.0 kW
- Min heat output
- 1.0 kW
- Max heat output (BTU/h)
- 13,648 BTU/h
- Air flow
- 168 m³/h
Fuel
- Fuel consumption min
- 0.12 L/h
- Fuel consumption max
- 0.51 L/h
- Fuel consumption max
- 0.136 gal/h
Controls
- Thermostat mode
- Yes
Power
- DC input voltage
- 12V
- Running power draw
- 57 W
Physical Attributes
- Weight
- 11.90 lbs
- Weight
- 5.40 kg
- Length
- 15.83 in.
- Length
- 402 mm
- Width
- 6.18 in.
- Width
- 157 mm
- Depth/Height
- 7.40 in.
- Depth/Height
- 188 mm
Altitude
- Max operating altitude
- 8,202 ft
- Max operating altitude (m)
- 2,500 m
Operating Temp Range
- Operating temp min
- -45 ℃
- Operating temp min
- -49 ℉
Safety
- Overheat protection
- Yes
- Low-voltage protection
- Yes
Warranty & Certification
- Warranty
- 2 Years
- ECE R122 approved
- Yes
- ECE R10 (E-mark) EMC
- Yes
Features
Details from the Longroadaccess Air 4D Amazon listing:
- AUTOTERM Air 4D. Air heater 4 kW (Planar)
- Fuel: Diesel
- Voltage: 12V / 24V
- Application: Vans, Campers, Trucks, Off-Highway, Boats/Yachts
- Comes with KOZAK Vest
Similar products from other brands
Chosen for their similar specs and price:
 This productLongroadaccess Air 4D |
 LF Bros Split T3 |
 KOZAK Air 2D |
 BougeRV DHG001 |
|
|---|---|---|---|---|
| Price | $1,299.99 | $189.99 | $949.99 | $219.99 |
| Model | Air 4D | Split T3 | Air 2D | DHG001 |
| Popular brand | No | No | No | Yes |
| Heater type | Split | Split | Split | All-in-one |
| Max heat output (kW) | 4.0 | 5.0 | 2.0 | 5.0 |
| Min heat output (kW) | 1.0 | 1.4 | 0.8 | – |
| Max heat output (BTU/h) (BTU/h) | 13,648 | 17,000 | 6,824 | 17,061 |
| Air flow (m³/h) | 168 | – | 86 | – |
| Fuel tank capacity (L) | – | 10.0 | – | 5.0 |
| Fuel tank capacity (gal) | – | 2.6 | – | 1.3 |
| Fuel consumption min (L/h) | 0.12 | 0.18 | 0.10 | 0.18 |
| Fuel consumption max (L/h) | 0.51 | 0.53 | 0.24 | 0.53 |
| Fuel consumption max (gal/h) | 0.136 | 0.140 | 0.063 | 0.140 |
| Max runtime per tank (hours) | – | – | – | 27 |
| Thermostat mode | Yes | – | Yes | – |
| Timer | – | Yes | – | Yes |
| Remote control included | – | – | – | Yes |
| App connectivity | – | – | – | Bluetooth |
| DC input voltage | 12V | 12V | 12V | 12V |
| Startup power draw (W) | – | – | – | 150 |
| Running power draw (W) | 57 | – | 29 | 60 |
| Noise level (dB) | – | – | – | 70 |
| Housing material | – | – | – | Metal |
| Air duct diameter (mm) | – | – | 60 | – |
| Weight (lbs) | 11.90 | – | 6.39 | 22.00 |
| Weight (kg) | 5.40 | – | 2.90 | 10.00 |
| Length (in.) | 15.83 | 14.88 | 12.20 | 15.30 |
| Length (mm) | 402 | 378 | 310 | 389 |
| Width (in.) | 6.18 | 5.55 | 4.69 | 9.70 |
| Width (mm) | 157 | 141 | 119 | 246 |
| Depth/Height (in.) | 7.40 | 5.91 | 5.71 | 12.40 |
| Depth/Height (mm) | 188 | 150 | 145 | 315 |
| Max operating altitude (ft) | 8,202 | – | 8,202 | 9,843 |
| Max operating altitude (m) (m) | 2,500 | – | 2,500 | 3,000 |
| Operating temp min (℃) | -45 | -40 | -45 | – |
| Operating temp min (℉) | -49 | -40 | -49 | – |
| Overheat protection | Yes | Yes | Yes | Yes |
| Low-voltage protection | Yes | – | Yes | – |
| Warranty | 2 Years | 1 Year | 2 Years | 2 Years |
| ECE R122 approved | Yes | – | – | – |
| ECE R10 (E-mark) EMC | Yes | – | – | – |
Data sources
Data for this product compiled from these sources:
Specifications last updated Oct 28, 2026.
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