Greenhouse with cooling pad wall and exhaust ventilation
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Evaporative cooling

Fan-and-pad cooling for hot, dry climates—size pads, exhaust airflow, and closure vents on this page.

Evaporative cooling system sizing

Structure

Eave / gutter height (same basis as configurator ventilation)

Used only for the pad/inlet closure vent package pricing (matches configurator covering inputs for twin-wall vs corrugated).

Approximate floor area: 2,880 sq ft

How this tool ties components together

Exhaust fans set the airflow target. The pad system is sized from that airflow, and the inlet closure vent is sized to the pad opening—same sequence as Fan & Pad on the greenhouse configurators. You can still request pricing for a subset if you are replacing one part of an existing install.

Estimates are for planning only. Electrical service, controls integration, water quality, and installation details are confirmed during formal engineering.

Understanding the results

Evaporative cooling uses exhaust fans to pull outside air through wet cooling pads. As air passes through the pads, water evaporates and the air temperature drops before that air moves across the crop zone.

Cooling performance depends on airflow. Exhaust fans set how much air must move; pad area and the inlet closure vent are matched to that airflow. The tool estimates system CFM, pad sizing, fan quantity, closure vent requirements, and indicative component or full-system pricing.

Results are for planning. Final pricing and system layout are reviewed by our team before a formal quote.

Equipment overview

  • Evaporative cooling pads — where outside air is cooled by evaporation before it enters the growing space.
  • Exhaust fans — pull air through the pads and across the greenhouse on a controlled path.
  • Pad / inlet closure vent — closes or regulates the pad opening when the system is not actively cooling.

Most common in hot, dry climates and frequently paired with gutter-connected houses, single-bay greenhouses, and cold frames where passive ventilation alone is not enough during summer peaks.

Frequently asked questions

Does evaporative cooling work in humid climates?
Performance depends on outside humidity. When outdoor air is dry enough, evaporation can substantially reduce supply-air temperature. In high humidity, cooling effect drops and other strategies may be needed.
Why are exhaust fans part of a pad system?
Pads cool air by evaporation; fans set how much air must move through the house. Pad area and distribution are sized to support that airflow—so fan CFM and pad sizing work together.
Can I quote only pads or only fans?
Yes. The sizing tool lets you request the full fan-and-pad package or individual component packages if you are replacing part of an existing system.
Is the system total a formal quote?
Results are indicative for planning. Final pricing and layout are reviewed by our team before a formal quote.

Request a quote

Use Add to quote list or Request formal quote on the calculator. Combine with mechanical ventilation, heaters, or other tools from the top bar.

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