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Autopilot

Your lights push photosynthesis, your nutrients feed it, and then CO2 quietly caps it. In a sealed room, plants can strip carbon dioxide down to starvation levels within hours of lights-on, and a generator running without feedback swings the other way, burning fuel and loading the room with heat. Autopilot fixes both problems by connecting generation to measurement. The APC8200 monitor and controller holds your chosen PPM and charts a full week of readings, so you can spot every overnight dip and midday spike. Pair it with the 4-burner propane generator for rooms up to 14' x 14', and you get enrichment that responds to your plants instead of a clock.

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Buyer's Guide

Autopilot: Complete Guide

Automate CO2 Enrichment From Sensor to Burner

CO2 enrichment rewards consistency. A room that holds its target through the entire light cycle outperforms one that spikes and crashes, and it does so on less fuel. Autopilot builds each generator, controller, and monitor to talk the same language, so growers can automate the whole enrichment loop instead of managing it by hand.

What Autopilot Brings to a Sealed Room

The core advantage is feedback. Autopilot controllers read the room through low-drift NDIR sensors and decide when to burn, when to vent, and when to stay idle.

  • One Controller, Two Jobs: The APC8400 digital controller drives enrichment during production hours and flips to exhaust mode to clear the air when your team steps inside, giving you a single tool for growth and worker safety.
  • Facility-Wide Lighting Command: The PX2 lighting controller schedules and dims hundreds of fixtures across two independent zones, so commercial rooms keep light intensity and CO2 levels working in step.
  • Built-In Shutoffs: Electronic ignition replaces the standing pilot light, and an automatic tip-over switch closes the gas supply if a hanging generator tilts past 30°.

Sizing Autopilot to Your Canopy

Measure your room first, then choose the generator that covers it and the sensor that keeps it honest.

  • Home Growers and Small Rooms: The desktop CO2 monitor tracks CO2, humidity, and temperature on a USB-powered unit you can move from tent to tent. Run it for a week to learn how fast your plants draw the room down before you buy a generator.
  • Commercial Flower Rooms: The 10-burner natural gas generator serves rooms up to 35' x 35' and taps straight into a facility gas line, which keeps enrichment running without tank changes.
  • Maintenance Insurance: Burners wear down over thousands of ignition cycles. Keep Autopilot replacement burners on hand in LP, NG, or high-altitude versions and swap one out in minutes.

Building around a TrolMaster system instead? See the TrolMaster Carbon-X lineup. To compare every brand, browse CO2 Controllers & Monitoring.

Dialing In Enrichment for Maximum Return

A few setup habits separate rooms that profit from CO2 from rooms that just burn fuel.

  • Shut Down at Lights-Off: Plants stop using CO2 in the dark. Use the controller's day/night photocell to stop enrichment automatically when the lights go out.
  • Read the Canopy, Not the Ceiling: Hang the sensor at plant height and keep it clear of the generator and exhaust intakes so the controller responds to the air your leaves breathe.
  • Keep Fans From Fighting the Burner: Link exhaust to the controller so fans only run when CO2 overshoots your upper limit, rather than venting enriched air on a fixed schedule.

Get those three habits right and Autopilot holds a steady target through every light cycle. For a side-by-side look at how Autopilot stacks up against other systems, read this roundup of the best CO2 controllers for grow rooms.

Frequently Asked Questions

How do I choose the right size Autopilot CO2 generator?
Size the generator to your room's footprint. The 4-burner model fits rooms up to 14' x 14', the 8-burner model covers up to 28' x 28', and the 10-burner model serves up to 35' x 35'. The 8-burner unit lets you run 2, 5, 7, or 8 burners, which gives you room to scale output up or down.
Is propane or natural gas better for CO2 enrichment?
Both fuels produce CO2 effectively. Propane (LP) works anywhere you can set a tank, which suits smaller and temporary setups. Natural gas (NG) fits facilities with an existing gas line and removes tank refills from your routine. Autopilot builds burners for each specific fuel, so order the model that matches your supply.
Can I run a CO2 generator without a controller?
You can, but you lose control of the result. A generator burns continuously whenever it has power and cannot measure the room. An Autopilot controller reads actual PPM and cycles the generator around your setpoint, which prevents overshoot, saves fuel, and keeps levels stable.
What does exhaust mode on the APC8400 do?
Exhaust mode triggers ventilation fans when CO2 climbs above your set limit. It reverses the usual enrichment logic to bring levels down, which protects people working in sealed rooms and other confined spaces.
Do CO2 generators raise grow room temperature and humidity?
Yes. Burning propane or natural gas releases heat and water vapor along with CO2. Larger generators add more of both, so factor them into your air conditioning and dehumidifier sizing, particularly in sealed flower rooms.
How safe are Autopilot CO2 generators?
Autopilot designs its generators around several safeguards: solid-state electronic ignition with no standing pilot flame, a tip-over switch that cuts gas past 30°, and LED indicators that report shutdown errors. Mount the generator suspended with open airflow underneath, following the manufacturer's instructions.
Does the Autopilot PX2 work with LED grow lights?
Yes. The PX2 handles up to 100 analog LED fixtures or up to 512 digital HID fixtures across two zones. Each zone runs analog or digital independently, so a single controller can manage rooms that mix LED and HID lighting.
Should I start with a CO2 monitor or a CO2 controller?
Start with a monitor if you want to learn how your room behaves before you invest in enrichment. It logs CO2, humidity, and temperature but does not switch equipment. Choose a controller once you add a generator or want fans to respond automatically to CO2 levels.
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