🌿 CO₂ Grow Room Calculator
Calculate CO₂ injection needs for sealed grow rooms to optimize plant growth and yield.
How to Use This Calculator
Measure room dimensions
Record interior length, width, and ceiling height for sealed grow spaces.
Set target ppm
Most flowering crops thrive near 1200–1500 ppm during lights-on periods.
Plan injection cycles
Use CO₂ controllers or timers to maintain desired ppm while monitoring ventilation.
Formula
Volume = Length × Width × Height
CO₂ (cu ft) = Volume × (Target PPM − Current PPM) ÷ 1,000,000
Convert CO₂ volume to tank usage or liters to schedule refills and maintain stable enrichment.
Full Description
Supplemental CO₂ increases photosynthesis rates in sealed grow rooms, boosting yields when paired with strong lighting and nutrition. Proper dosing prevents waste and keeps ppm within safe ranges for plants and staff.
Use closed-loop HVAC, dehumidification, and monitoring sensors to maintain environmental stability after CO₂ enrichment.
Frequently Asked Questions
How often should I inject CO₂?
Inject during lights-on periods. Frequency depends on room tightness and plant uptake—monitor ppm with a controller.
Is 1500 ppm safe?
Yes for plants, but keep occupied spaces below 2000 ppm and ventilate before entering.
Do I need CO₂ in ventilated rooms?
Constant exhaust removes CO₂ quickly. Sealed or semi-sealed rooms benefit most from supplementation.
How large is a 20 lb tank?
A 20 lb cylinder contains about 174 cubic feet of CO₂ gas. Replace or refill when tank pressure drops.