Inputs
10 parameters · live recalculation on every change
M³
10m³
100m³ default
1000m³
PPM
300ppm
400ppm default
2000ppm
PPM
400ppm
1200ppm default
2000ppm
ⓘ Basis of calculation How it’s computed
1
Measure the sealed room volume in cubic metres and the current canopy CO2 with a calibrated sensor.
2
Set the target on the crop physiology: C3 plants (tomato, lettuce, cannabis) saturate 1200–1500 ppm, C4 plants (corn, millet) 800–1000 ppm.
3
Compute the gas mass with the leak baked in: kg = V × Δppm × 1.8 ÷ 1e6 × (1 + leak/100).
4
Size the delivery: injection time = kg ÷ regulator rate, then project price × (fill + daily leak make-up).
5
Check the climate interaction: the CO2 load inflates the VPD band and lifts the leaf-temperature offset above air.
6
Grade the safety: green ≤1500 ppm, yellow ≤2000, red above 2000, absolute LOCKOUT at 5000 ppm — ventilate, never occupy.
Live output
CO2 Needed
0.12
kg
CO2 Needed
1000 ppm · Veg — moderate 800–1200 · light ceiling 1000 ppm · light-limited (≤600 PPFD): boost capped 15% · boost 15.00% · 0.20 g/ppm · $0.52/day · VPD 1.13 kPa · GREEN · within safe 8-h exposure guidance
Injection Time
0.02
hrs
Cost per Day
$0.52
$/day
Growth Boost
15.00
%
VPD Adjusted
1.13
kPa
Leaf Temp Offset
0.30
°C
Canopy CO2
1000
ppm
Leak Make-up
0.14
kg/day
Mode
standard
Active profile