Our Shade & Heat Retention Curtain Systems are designed to maximize your greenhouse growing conditions. We feature both a cable driven and a rack and pinion driven system. StrataScreen™ is the ultimate in suspended cable driven curtain systems, utilizing proven stainless steel suspension lines and a stainless steel aircraft cable drive system. CirraScreen™ is the ultimate in suspended push-pull driven curtain systems, utilizing stainless steel suspension lines and a steel rack and pinion drive system. A wide variety of fabrics are available in order to assure you the correct shade and energy retention curtain system to outfit your greenhouse growing operation. Click the drawings below for further details about the StrataScreen™ and CirraScreen™ Curtain Systems available from United Greenhouse Systems. Flat Curtain System available from United Greenhouse Systems. » View Larger Image Slope-Flat-Slope Curtain System available from United Greenhouse Systems.

Sloped Curtain System available from United Greenhouse Systems. Minimizes heated area during cold season StrataScreen™ Slope Flat Slope Maximizes growing space heights, minimizes upper level cold air space Maximizes growing space heights of single slope greenhouses CirraScreen™ Slope Flat SlopeYellow Labrador Retriever Puppies For Sale In Bc Maximizes growing space heights of single slope greenhousesPatio Furniture Retailers Bristol Volume 76, Issue 5, 2004, Pages 603–613Puppies For Sale Cheap In Ct Mathematical modeling for greenhouse heating by using thermal curtain and geothermal energy Received 26 February 2003, Revised 2 December 2003, Accepted 2 December 2003, Available online 29 December 2003Communicated by: Associate Editor S.C. BhattacharyaA thermal model has been developed for the heating of a greenhouse by using inner thermal curtain and natural flow of geothermal warm water through the polyethylene tube laid on its floor.

The calculations were done for a typical production greenhouse with the climatic data in the central part of Argentina during winter period. From the energy conservations point of view, the greenhouse has been divided into three zones i.e., zone I (plants under thermal blanket), zone II (space under ceiling) and zone III (space between roof and ceiling). The model has been tested with the published experimental data of air temperatures in zone I and zone II of the greenhouse. From the results, it was observed that the temperatures of air surrounding the plant mass in zone I were maintained in the range of 14–23 °C during winter night and early morning resulting in the better growth of winter growing plants against the harmful freezing effects. The predicted values of air temperature both in zone I and zone II of the greenhouse obtained from the proposed model exhibited fair agreement with the published experimental values.Copyright © 2003 Elsevier Ltd. According to Virginia Tech University,

“Up to 85% of the heat loss from a greenhouse occurs atUsing a thermal blanket to retain heat at night can be a cost efficient investment… primarily for heat retention can reduce energy use by up to 50%, whereas blankets offered as combination thermal blanket and summer shade protection can reduce winter energy use 25% Temptrol® does not provide an R-value, but the TempShield® applications will have the same R-values as those listed for Metal Building, depending on the construction of your greenhouse. For greenhouses, direct sunlight is not best. light only hit the leaves on top, neglecting the plants growing under the canopy. A radiant barrier actually reflects and disperses the heat and light, so if it is used on the greenhouse as a draped shade cloth, the heat from your lamps will be able to circulate to the plants at many While typical blackout fabrics can impede light, they absorb more heat, adding to the energy problem.

Temptrol® and TempShield® Double Bubble Foil block the majority of the light while reflecting the radiantThey also have features disallowing condensation that occurs often in climates with excess humidity. don’t have to worry about the condensation from the roof of the greenhouse pooling above the plants. To get day-length sensitive plants to flower at times of the year when the day length is naturally long, Temptrol® may be used to create darkness from early evening until night-time and then again in the morning from just before sun-rise until sufficient hours or darknessOne aspect of using typical blackout cloth is the fact that, because the cloth is of necessity a closed weave cloth, there is a difficulty in providing micro perforations allow air and moisture to move freely, without the need for expensive exhaust fans. TempShield® Double Bubble Foil can provide a higher R Value per inch than foam or

fiberglass at a fraction of the price. insulation only slows down conductive or convective heat transfer, TempShield® Double Bubble Foil also blocks radiant heat, which is the primary mode of heat transfer in and out of your greenhouse. comes in a large variety of widths and sizes, it makes installation that much easier. Why not use the same insulation in your greenhouse that millions have trusted inThe following presentations were developed with the assistance of a SARE Professional Development grant for the education of cooperative extension educators, college instructors and high school vocational agricultural teachers on energy efficiency and the use of biomass energy for heating greenhouses. If you'd like the PowerPoint files of these presentations or a video tape of the webinar of the different presentations (approximately 1 hour each), please send an email with your contact information (educational institution name, address, phone number and email) and educational affiliation to Scott Sanford at sasanford@wisc.edu.

Topics will include type of structure, glazing materials, types of heat loss, infiltration losses, heating systems, heat distribution, thermal curtains, space efficiency, summer ventilation, supplemental lighting and a brief look at passive solar greenhouse design. Thermal/Shade Curtains for Greenhouses Topic covered: The advantages and uses of a curtain system, types of configurations, installation issues, basic components, types of curtain materials, installation, curtain opening devices, controls, curtain management, approximate energy savings and installed costs. We also look at an alternative technology that uses foam between poly films to reduce heat losses. There are several greenhouse energy estimation tools available for estimating the energy use and potential energy savings from different energy conserving technologies and management practices which will be reviewed. Energy-Efficiency in Greenhouse Crop Production Topics covered: Use of supplemental lighting on plugs and transplants to accelerate cropping and improve plant quality, controlling photoperiod for flowering of finished plants, and energy-efficient temperature strategies during the finish stage.

Alternative Fuels for Heating Greenhouses Topics covered: This presentation will look at different potential fuel sources (biomass & used oils), types of furnaces and boilers including outdoor wood-fired hydronic heaters, pellet or grain fired boilers/furnaces, stand alone stoves and a case study of two greenhouses. We'll wrap up the presentation with information on energy grants to help pay cost share the capital costs of energy saving equipment or heating equipment to burn a renewable fuel. UW Greenhouse Energy Analyzer This tool runs on Microsoft Excel. The tool uses your inputs on how the greenhouse is constructed along with temperature and solar data to calculate the heating needs for the period of time and temperature profiles used for your greenhouse. The program help you analyze changes in glazing materials, reducing infiltration losses, perimeter heat loss, high efficiency heaters, the type and location of heat distribution, day/night temperature profiles, and thermal/night curtains.

The calculations are based on 30 year averages of weather data and will not likely exactly match your energy use in any given year but it can but used to compare energy efficiency options. The estimated energy savings should be in the range of what would be expected in an average year. The weather data in the program includes the following states: Wisconsin, Illinois, Michigan, Minnesota, Ohio, South Dakota, North Dakota, Nebraska, Iowa, Indiana. Send an email with your contact information to sasanford@wisc.edu and you will receive a copy of the program by reply. We need your contact information so we can get you an updated program in case we find an error; it will not be shared or used for any other purpose. Additional Greenhouse Energy Resources Additional Resources - A list of additional resources that may be helpful for reducing greenhouse energy use. There are also resource lists at the end of the extension publications listed above. If you have information you think would be useful to this site please contact Scott Sanford, Senior Outreach Specialist, University of Wisconsin, sasanford@wisc.edu.