Lettuce cooling in a polycarbonate greenhouse
ClimaSpan supplies climate equipment for lettuce cooling in polycarbonate greenhouses. Exhaust fans, evaporative cooling pads and circulation fans are selected to the crop, climate and multiwall PC structure so midday heat and humidity leave the canopy instead of sitting still. Lettuce quality suffers quickly when air stagnates under a rigid cover. Specifications are confirmed on the quotation—not listed as fixed catalogue sizes on this page.
Polycarbonate houses are common for year-round leafy work because multiwall panels add insulation and a durable rigid cover. That same envelope can hold heat and moisture on bright days. This article explains how ClimaSpan frames lettuce cooling as a climate-equipment plan—not a structure sale and not a public price list. House type, location and bed or channel layout still decide what we quote.
Why polycarbonate houses matter for lettuce cooling
A polycarbonate greenhouse uses twin-wall or multiwall PC panels on a framed house. Compared with single film, the cover often slows heat loss at night and can reduce light hotspots when diffusion grades are used. For lettuce, the practical result is a steadier base climate—and a stronger need to actively remove heat when solar load rises.
ClimaSpan does not sell polycarbonate structures. We match exhaust, pad and circulation equipment after we understand the house. Read the structure overview on the polycarbonate greenhouse page, then share dimensions and location so cooling selection follows the real load.
On bright days the rigid cover still admits enough light that bed-level temperatures climb unless exhaust openings and intake paths are planned with the crop zone in mind. Diffused polycarbonate can soften shadows, but it does not replace active air exchange when solar load peaks.
Cooling roles: exhaust, pads and circulation
Exhaust fans move warm, humid air out of the house so outdoor air can enter. In a pad-and-fan layout, evaporative cooling pads wet the intake wall; as water evaporates, intake air temperature drops before it reaches the crop. Circulation fans keep air moving across beds or channels so temperature and humidity stay more even from edge to centre.
Lettuce plans often emphasise gentle, uniform airflow rather than aggressive spot blast. Still air and hard swings across the bed raise tip-burn and soft-tissue risk. We do not publish face velocities, pad thicknesses or fan model charts on this page; those details stay on the quotation after we review your climate notes.
When pad-and-fan is used, the pad wall and the exhaust wall work as a pair. Intake air should cross the crop before it leaves; short-circuit paths along empty alleys waste cooling. Circulation is then used to even the pattern rather than to fight a poorly placed exhaust line.
How planning usually proceeds
Email house length, width and height, polycarbonate panel notes if you have them, lettuce mix (head, baby leaf or similar) and peak summer concerns. Mention soil beds, benches or hydroponic channels. We suggest climate equipment as solution components and quote by project.
Related reading on this site: pad-and-fan cooling, how exhaust fans work, and greenhouse air circulation. Product pages for exhaust fans, cooling pads and circulation fans stay slim; guides carry the how-it-works detail.
If you already operate a polycarbonate house, note existing fan openings, screen or shade habits and whether cooling has been undersized in past summers. Retrofit quotes still start from measured dimensions and climate, not from copying another project.
What this page does not claim
No public prices, no invented case studies and no yield or fertility targets appear here. Cooling effectiveness always depends on outdoor wet-bulb conditions, house leakage and how the intake and exhaust walls are arranged. ClimaSpan confirms specifications on the quotation after inquiry to [email protected].
Related climate products
Related resources
Pad-and-Fan Cooling
How Exhaust Fans Work
Greenhouse Air Circulation
Related structure
Polycarbonate greenhouse
Leafy greens solutions
Frequently asked questions
Do polycarbonate lettuce houses always need cooling pads?
Not always. Pad-and-fan layouts are considered when summer heat is a project driver. Cooler climates or well-ventilated houses may emphasise exhaust and circulation first. Selection follows your climate and structure.
Will you list fan models or pad sizes on this page?
No. This page explains roles only. Exhaust fans, pads and circulation fans are quoted after we review house dimensions and location.
How should I request a lettuce cooling quote?
Email [email protected] with polycarbonate house size, location, lettuce type and peak heat or humidity concerns. We reply with equipment suggestions and a project quotation.
Request a quote
Tell us your polycarbonate greenhouse size, crop and location. We quote climate equipment by project.
Request a quote — [email protected]Leafy greens solutions · Back to ClimaSpan home · [email protected]