Return-Stack Heating Solutions

AGI’s return-stack heaters provide reliable frost protection for orchards, vineyards, and other high-value crops, combining proven performance with a cleaner burn profile.

Fuelled by diesel or oil, each unit re-combusts unburned gases within an enclosed chamber, significantly reducing smoke compared to traditional orchard heaters. Hot gases rise through a vertical stack, creating convective air movement that helps stabilise temperatures in frost-prone areas.

Trusted across viticulture, horticulture, and agriculture for decades, these heaters deliver consistent, cost-effective frost protection backed by proven field performance.

WHY CHOOSE AGI’S RETURN-STACK HEATERS?

Cleaner burn profile: Produces significantly less smoke compared to traditional orchard heaters, reducing environmental impact.
Proven efficiency: Trusted for decades to deliver consistent, reliable frost protection across orchards, vineyards, and high‑value crops.
Flexible use: Operates effectively on its own or in combination with frost fans to minimise frost formation and strengthen protection.
Scalable solution: Cost‑effective and adaptable for targeted heat in vulnerable zones, making it suitable for farms of all sizes.

USING RETURN-STACK HEATERS WITH FROST FANS

For more severe frost conditions or weak inversion layers, AGI return-stack heaters can be combined with frost fans to improve overall system performance.

The heaters generate a warm air plume that is captured and distributed by the fan airflow, creating improved thermal mixing and enhanced frost protection. This integrated approach increases efficiency and provides more reliable crop protection during extreme cold events.

ENQUIRE ABOUT OUR HEATERS ›

CUSTOM, FULLY-AUTOMATED HEATING SOLUTIONS

AGI also provides diesel and Liquefied Petroleum Gas (LPG) burners, designed to integrate seamlessly with our proprietary heater control unit. This system connects directly to the AGI LIVE platform and automatically activates once your temperature setpoints are reached. Simply connect your diesel tank or LPG supply, and the heaters will switch on at the precise moment protection is needed.

ENQUIRE ABOUT OUR CUSTOM HEATING SOLUTIONS

For extreme frost or weak inversion layers, pair our custom heating solutions with existing frost protection to boost hot air circulation and maximize efficiency. These fully automated burner systems integrate seamlessly with AGI LIVE, giving you precise control and reliable peace of mind.

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AGI offers a complete range of frost mitigation solutions, combining advanced equipment with data-driven technology and expert support to deliver reliable, efficient crop protection.