DRAWING THE SHEET —
ENVIRONMENTAL SYSTEMS — THE SETPOINT PATH
Hold your crop's number all year.
The house ships sealed, with zero built-in openings. A large AC system we supply runs temperature and humidity together, engineered to your crop and its stages, and your VPD band holds through the worst week of the year.
- THE SEALED HOUSE IS THE STARTING POINT
- TEMPERATURE + HUMIDITY, ONE SYSTEM
- ARG-SUPPLIED, ENGINEERED TO YOUR CROP
A STANDARD SYSTEM RUNS ≈ $100,000 — BASIS BELOW
01 — THE SETPOINTS IT EXISTS TO HOLD
The setpoint ramps with the crop.
Young tissue wants humid air, and the target dries toward harvest. Below 0.4 kPa mold moves in. Above 1.6, the stomata close and growth stalls.
CANNABIS TRADE CONSENSUS — OPERATING BANDS
02 — THE LIGHTS-OFF LOAD
THE 2AM JOB
Comfort AC quits at lights-off.
Cooling stops, so drying stops, while the canopy keeps transpiring roughly 70% of its irrigation back into the air. This system ramps dehumidification exactly when the lights go out.
- LIGHTS-OFF HUMIDITY SPIKE
- LATENT LOAD ≈ 70% OF IRRIGATION
- SOURCE — HPAC ENGINEERING
03 — THE HONEST ANCHOR
A STANDARD SYSTEM RUNS
≈ $100,000
That covers the climate system alone on a standard 30×100. Budget from it before anyone asks for your number. Your figure lands in your quote.
WHY THIS QUOTE TAKES LONGER
We size the system to your crop, its growth stages, and the targets you run. That asks for more input and more time than the build tool needs. A number produced faster would land wrong on one side or the other.
04 — CHOOSE
If your worst night is humid, this is your path.
One question settles most of this.
Answer it the way your worst week goes. If the active-ventilation package holds your numbers, we'd rather you keep the money.
THE DECISIVE QUESTION
On your hottest, most humid design day, can outside air pulled through a wet pad still hold the temperature and humidity your crop needs?
IF YOU'RE WEIGHING IT ON CLIMATE
LEAN ACTIVE WHEN —
Dry heat. Evaporative cooling drops the most degrees where humidity is low
LEAN VPD CONTROL WHEN —
Your design day is hot and humid
IF YOU'RE WEIGHING IT ON CROP
LEAN ACTIVE WHEN —
Leafy greens, cool-season veg, hardy ornamentals, nursery and bedding stock
LEAN VPD CONTROL WHEN —
High-value fruiting, propagation, disease-sensitive crops, cannabis
IF YOU'RE WEIGHING IT ON QUALITY BAR
LEAN ACTIVE WHEN —
Healthy and marketable, seasonal, weather-tolerant
LEAN VPD CONTROL WHEN —
Contract-grade consistency, max yield per square foot, year-round
Still split? Disease usually decides it. When one humid night of bud rot or powdery mildew costs more than the climate equipment, size the VPD system. Otherwise buy the active-ventilation package and bank the difference.
Scope the system to your crop.
A Greenhouse Expert sizes it to your crop and stage targets, and the quote carries your real figure.