Portable diesel heater fitted with a black 4 inch hot air hose using an Aetherium duct adapter. Product image identifies the adapter as a diesel heater connection for 4 inch hose and larger ducting systems.

Heat Link | Diesel Heater to 4" HVAC hose Adapter

Heat-Link Classic
$59.00
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Portable diesel heater fitted with a black 4 inch hot air hose using an Aetherium duct adapter. Product image identifies the adapter as a diesel heater connection for 4 inch hose and larger ducting systems.
  • Portable diesel heater fitted with a black 4 inch hot air hose using an Aetherium duct adapter. Product image identifies the adapter as a diesel heater connection for 4 inch hose and larger ducting systems.
  • Portable diesel heater supplying warm air through flexible ducting to a rooftop tent on an off-road vehicle. Example of an off-grid diesel heater setup for camping, overlanding and vehicle-based shelter heating.
  • Aetherium material graphic describing carbon-fiber-reinforced polycarbonate construction as lightweight, durable and heat resistant for engineered outdoor components and diesel heater accessories
  • Close-up of an Aetherium diesel heater duct adapter friction-fit to a 3 inch 75 mm heater outlet and connected to 4 inch flexible dryer hose with a hose clamp. Hose clamp shown for installation reference and is not included.
  • Aetherium diesel heater adapter displayed with several flexible duct and hose styles in a workshop, introducing available Heat-Link and Mag-Link connection variations for custom heater duct installations.
  • Heat-Link Classic diesel heater adapter installed on a portable heater outlet. The fixed friction-fit coupler is designed for stable structural heat and permanent or semi-permanent 4 inch duct connections.
  • Aetherium Mag-Link magnetic diesel heater coupler shown separated from its heater-mounted collar, exposing the embedded magnets used for rapid connection and disconnection of portable hot-air ducting in field setups.
  • Close-up of the hose-side Mag-Link magnetic diesel heater coupler attached to flexible 4 inch ducting with a stainless hose clamp. Embedded magnets and alignment features form the quick-connect interface for repeated setup and teardown.
  • Flexible diesel heater duct connected to an Aetherium Vent link setup in wet weather on a overland camping rig. Cross-sell image directs buyers to complementary heater duct ports and installation accessories sold separately.
  • Modified Jeep Wrangler Rubicon in a Pacific Northwest forest promoting Aetherium Innovations custom gear and accessory development for overland vehicles, camping systems and specialized equipment installations.
  • Aetherium Innovations brand image featuring a geometric brass lion sculpture on a workshop bench with the message Where Artistry Meets Engineering, representing the company’s combined fabrication, design and engineering approach.
  • Portable diesel heater fitted with a black 4 inch hot air hose using an Aetherium duct adapter. Product image identifies the adapter as a diesel heater connection for 4 inch hose and larger ducting systems.
  • Portable diesel heater supplying warm air through flexible ducting to a rooftop tent on an off-road vehicle. Example of an off-grid diesel heater setup for camping, overlanding and vehicle-based shelter heating.
  • Aetherium material graphic describing carbon-fiber-reinforced polycarbonate construction as lightweight, durable and heat resistant for engineered outdoor components and diesel heater accessories
  • Close-up of an Aetherium diesel heater duct adapter friction-fit to a 3 inch 75 mm heater outlet and connected to 4 inch flexible dryer hose with a hose clamp. Hose clamp shown for installation reference and is not included.
  • Aetherium diesel heater adapter displayed with several flexible duct and hose styles in a workshop, introducing available Heat-Link and Mag-Link connection variations for custom heater duct installations.
  • Heat-Link Classic diesel heater adapter installed on a portable heater outlet. The fixed friction-fit coupler is designed for stable structural heat and permanent or semi-permanent 4 inch duct connections.
  • Aetherium Mag-Link magnetic diesel heater coupler shown separated from its heater-mounted collar, exposing the embedded magnets used for rapid connection and disconnection of portable hot-air ducting in field setups.
  • Close-up of the hose-side Mag-Link magnetic diesel heater coupler attached to flexible 4 inch ducting with a stainless hose clamp. Embedded magnets and alignment features form the quick-connect interface for repeated setup and teardown.
  • Flexible diesel heater duct connected to an Aetherium Vent link setup in wet weather on a overland camping rig. Cross-sell image directs buyers to complementary heater duct ports and installation accessories sold separately.
  • Modified Jeep Wrangler Rubicon in a Pacific Northwest forest promoting Aetherium Innovations custom gear and accessory development for overland vehicles, camping systems and specialized equipment installations.
  • Aetherium Innovations brand image featuring a geometric brass lion sculpture on a workshop bench with the message Where Artistry Meets Engineering, representing the company’s combined fabrication, design and engineering approach.
Heat Link | Diesel Heater to 4" HVAC hose Adapter

Heat Link | Diesel Heater to 4" HVAC hose Adapter

1 reviews

$59.00
Shipping calculated at checkout.
Version

Made to order: 1-5 business days

Cold mornings hit hard.

Whether you’re in a cabin, workshop, RV, or out camping, everyone knows the feeling of waking up in the cold.
The Heat-Link / Mag-Link Diesel Heater Adapter turns your heater from a standalone box of warm air into a modular heating system.

It converts the common 3" / 75 mm heater outlet to standard 4-inch ducting, giving you longer reach, easier routing, and access to readily available flexible ducting for custom heating setups.

Made from carbon-fiber-reinforced polycarbonate, the adapter is built to remain rigid through heat, vibration, transport, repeated setup, and real-world field use.

Compatibility

- Fits many common 4 kW–8 kW diesel heaters
- Designed for 3" / 75 mm hot-air outlets
- Converts to standard 4-inch flexible ducting
- Push-fit installation onto the heater outlet
- Secure ducting with a standard hose clamp
- Hose clamp and ducting not included

Choose Your Connection

Heat-Link Classic :
Simple friction-fit connection designed for stable, fixed or semi-permanent duct routing.

Mag-Link :
Magnetic quick-connect coupling designed for rapid setup, teardown, and repeated field deployment.

Looking for a complete heating solution?
Part of an expanding ecosystem, bundle your adapter with:

- Vent Link Camper & Structural Integration
- Tent Link Tent Integration
- 12V DC power accessories and cables

Sold separately - see store for more products

Engineered for those who live off the beaten path.
Proudly made and tested in the Pacific Northwest, USA.

Every order supports Aetherium Innovations and our mission to develop tools and technologies that lower the barriers in the skilled art trades.

Bench-tested

Modular by design

Direct builder support

Pacific Northwest built

Build & Support

Aetherium products are developed around real workshop and field workflows. If you need dimensions, compatibility guidance, replacement components, or help adapting this product to your setup, contact the workshop before ordering.
Shipping & Returns

The production estimate shown near the purchase button is the current working lead time for this item. Shipping is calculated at checkout.

If an order arrives damaged, does not match what you received approval for, or you need to request a return, contact us with the order number and photos when applicable. We will review the situation directly and help determine the right next step.

Complete the system

Why Aetherium

Built like someone has to use it.

We design around real workflows, direct feedback, and the belief that a good tool should expand what its owner can do.

Bench-testedDeveloped around real workshop problems, not trend forecasts.
Small-batchProduced deliberately with clear lead times and direct accountability.
AdaptableModular, repair-minded systems designed to evolve with the work.
Direct supportCompatibility question? You can talk to the person who built it.
Unsure whether this fits your setup?Send the workshop a photo or a short description before you order.
Ask a compatibility question
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K
Kevin

This thing worked for my lf bros n2 diesel heater! One of the few that offers this solution to go from 3” to 4”.