Overwintering Greenhouse

1.Product Overview

Overwintering Greenhouse,also widely known as Solar Greenhouse or Sunlight Greenhouse,is a passive energy-saving agricultural facility specially engineered for cold northern regions with long freezing winters.

It adopts a unique south-facing single-slope arched layout,matched with a thick multi-layer insulated heat-storage north rear wall and automatic rolling thermal insulation quilt system.During daytime,the wall fully absorbs solar radiation and stores heat;after sunset,it releases heat slowly to maintain stable indoor growing temperature above 5℃even when outdoor temperature drops to-15℃~-25℃,without continuous auxiliary heating equipment.

Constructed with heavy hot-dip galvanized anti-rust steel frame and high-transmission anti-fog PO plastic film,this overwintering greenhouse features low construction investment,ultra-low winter operation cost and simple daily maintenance.It is the most popular facility for off-season vegetable,strawberry,flower and seedling overwinter cultivation across high-latitude cold zones,Central Asia,Russia and Northern Europe.

2.Core Structural Composition

2.1 Reinforced Galvanized Steel Arch Frame

Material:Hot-dip galvanized oval/round steel pipe,full passivation anti-corrosion,service life≥15 years

Custom standard spans:8m/10m/12m/16m;ridge height 3.2–6m;customizable total length 50–120m

Load standard:Wind load up to 0.45kN/㎡,snow load 0.45kN/㎡,reinforced arch to resist heavy snow and strong wind

Optional pillar-free wide-span design for tractor&mechanical farming operation

2.2 Heat Storage Insulated Rear Wall(Core Overwintering Feature)

Three-layer composite heat preservation wall:outer protective layer+middle foam insulation core+inner heat absorption brick/concrete layer

Blocks cold north wind effectively

Stores solar heat in daytime,releases heat overnight to prevent crop frost damage

Optional anti-freeze trench at wall base to cut soil heat loss

2.3 Light-transmitting Plastic Film Cover

PO Polyolefin Film(Premium):Light transmittance≥90%,long-lasting anti-fog anti-dripping,UV anti-aging,service life 3–5 years

PE Film(Economical):Transmittance 83%–88%,service life 2–3 years

Double-layer inflatable film(ultra-cold area upgrade):Air interlayer boosts heat retention,reduces heat loss by 30%

2.4 Exclusive Thermal Insulation System for Overwinter

Waterproof composite thermal quilt:Rainproof,snowproof,frost-resistant,blocks over 80%nighttime heat loss

Electric roller motor:Auto roll up/down quilt,timing intelligent control,save heavy manual labor

3.Optional Full Supporting Climate Control Systems

All devices can be independently configured or integrated into PLC intelligent control cabinet:

Ventilation System:Side electric roll-up film vents+top small skylight,adjust humidity&CO₂concentration

Summer Cooling System:Exhaust fan+water cooling pad for high-temperature spring&autumn

Irrigation System:Drip irrigation,sprinkler irrigation,water&fertilizer integrated machine

Auxiliary options:Insect-proof net,mobile seedling bed,backup heating stove,temperature/humidity/light sensors

4.Unique Advantages of Overwintering Greenhouse

Zero continuous heating cost in winter

Passive solar heat storage design realizes normal crop growth under sub-zero outdoor temperature,saves over 90%heating cost compared with multi-span greenhouses with boilerspolytunnel....

Stable anti-frost microclimate

Dual heat preservation from thick rear wall+thermal quilt avoids overnight frost injury to sensitive crops like strawberry,tomato and leaf vegetables.

Low total investment&easy maintenance

Simpler structure than full-automatic multi-span greenhouses;film and thermal quilt replacement low-cost without complex construction.

Long production cycle&high economic benefit

Supports year-round planting:winter overwinter crops,spring early seedlings,autumn delayed harvest,filling market supply gap with high selling price.

Full modular customization

Span,height,wall insulation thickness and supporting equipment adjustable according to local minimum winter temperature,snow load and crop varieties.