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Autoterm 4″ High Temperature Air Duct (PDH4-003)

From: $84.95

10% of profits donated to Sierra Club + 1% of total sales donated to Stripe Climate Change initiative.

Autoterm 4″ High Temperature Air Duct (PDH4-003) is available in 5 or 10 Foot lengths.

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Autoterm 4″ High Temperature Air Duct (PDH4-003) is available in 5 or 10 Foot lengths.

Weight6 lbs
Dimensions25 × 25 × 20 in
Hose Length

5 Feet, 10 Feet



Autoterm North America is the North American sales service and distribution company for Autoterm heating and hot water systems manufactured by Advers.

Advers, headquartered in Latvia, is one of the worlds largest autonomous heater companies. Founded in 2000 by Evsei Kordit, Advers has been dedicated to designing and manufacturing the highest quality most reliable air and fluid heaters for mobile applications. Evsei has been a successful inventor and chemist for many decades and after the fall of the Soviet Union was able to launch his own company; designing and inventing the best heating solutions in the world. Over the past 20 years Advers has grown to over 700 parters in 60+ countries. Advers achieved ISO certification in 2007. Advers has over 1000 employees.

Autoterm heaters are tested in the harshest environments in temperatures as low as -50F. Both the air and fluid heater ranges are built to be long lasting and reliable but for affordable prices. Autoterm has solutions for multiple industries including the heavy truck, recreational vehicle, marine, and agricultural markets.

Advers is the third-largest autonomous diesel heater manufacturer in the world. With more than 20 patents to their name, their signature technology allows the heater to combine decent quality, exceptional reliability at the best price, which makes them a sought-after product. Today, Advers is a company with more than 1,000 employees and three production and R&D facilities that brings to the market over 200,000 units per year. With more than 500 dealers in 30+ countries Advers has become a strong player in North American, European, and Australian markets.

AUTOTERM Air series air heaters are independent, diesel powered heating systems that can be easily and conveniently installed or retrofitted in your vehicle.

The heater unit is supplied with fresh air from outside or well ventilated air from the room, which is taken through an air intake pipe to the internal combustion chamber. The received air is then mixed with the fuel, which is delivered through a metering fuel pump, and the air-fuel mixture is formed. This mixture is then ignited by a glow plug, which initiates the burning process to heat up the heat exchanger. Air is then drawn from the air inlet with a fan and passed through heat exchangers and the radiator fins. Finally, the heated air is pushed through the hot air outlet.

AUTOTERM Air series air heaters are excellent products for spaces which need to be heated quickly, or where there is no built in central heating system. For example: camper vans, boats, tiny homes, etc.

All heaters are equipped with built in fail-safe systems and sensors. The self-diagnostic system will automatically shut down the heater if it encounters any errors (such as battery drain, over-heating of the heater, low fuel level, air pump malfunction, or flame failure) and is thus a completely safe product.

All AUTOTERM Air series heaters are equipped with brushless induction motors that ensure low noise levels as well as a long lifetime for your device, and the capability to operate in extreme environments as low as -45°C/-49°F.

AUTOTERM Air series heaters can be controlled with various control panels or remotely via your iOS or Android smartphone (remote control modem sold separately).


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WarningWARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to

Nomadic Supply Company Freight Versus the Big Box Stores

Nomadic Supply Company wants you to receive your valuable products in absolutely pristine condition so we ship our large refrigerators via truck freight, and we handle and package them in a way that no other retailer does.

When we prepare refrigerators for shipment we spend a full hour to inspect, re-pack, prepare, and schedule your truck freight shipment for the following day. This process ensures that your order arrives to you completely undamaged and in brand new condition. Our competitors do not do any of this for you, and they are are infamous for having their refrigerator shipments arrive damaged.

Our detailed inspection and repacking process will cause a minor delay in shipping your order to you, but unlike all of the other online stores, our shipments actually arrive to you in one piece, without damage, every single time.

  • → We inspect, repack, & double or triple box refrigerators in our custom made, dual wall, fully overlapped, 450lb. test-rated boxes.
  • → Nomadic Supply Company adds 2” Styrofoam and reinforcements to the packaging and all of the large refrigerators are fully palletized.
  • → We take photos of your shipment before, during and after your order is completed. Our customers LOVE this!

We do not recommend residential deliveries via truck freight:

Residential deliveries are always more expensive than shipping to the closest freight terminal. Shipping to the closest truck freight terminal in your area has numerous advantages over shipping to your residence:

  • → It saves you a ton of money in truck freight fees, usually around 50%.
  • → You can schedule to pick the shipment up at your convenience rather than spending a full day at home waiting for it.
  • → You can thoroughly inspect your shipment for potential damage caused by the freight carrier before accepting & signing for it.

You must read and understand the entire LTL Freight process if you want to order a refrigerator from Nomadic Supply Company.