Starting a DIY Deep Winter Greenhouse operation on a budgetįor those who are looking to build a DWG on a budget, this report explains some of the techniques used by experienced DWG producers to build your own affordable structure for winter production. These case studies will explain some of the extra considerations that might be necessary. This report is helpful for urban and non-profit organizations that are looking to build a DWG. Nonprofit use of Deep Winter Greenhouses: Minnesota case studies These documents reflect design changes incorporated as a result of the statewide prototype 2.0 initiative. Deep Winter Greenhouse 2.2 construction documents Though the greenhouse uses solar heat, it will also require an additional backup heat source. These plans offer different options for thermal mass storage, foundations to accommodate different budgets, and comfort levels with complexity. The greenhouse primarily uses the sun’s heat which is captured and stored in a thermal mass. This Farm Scale Winter Greenhouse is appropriately scaled to offer small and medium sized farms the opportunity to grow vegetable crops for sale year-round. Mattson MacDonald Young provided the structural review and structural plans for the statewide DWG campaign prototype.įarm Scale Winter Greenhouse construction document Support for the statewide initiative is provided by Extension, other University of Minnesota programs and a consortium of agriculture lending banks: Lake City Catholic Worker Farm (ribbon cutting May 5, 2018).Alternative Roots Farm in Madelia (ribbon cutting October 29, 2017).Grandpa G's Farm in Pillager(ribbon cutting December 8, 2018).Bemidji Community Food Shelf (ribbon cutting September 30, 2017).Organic Consumers Association Finland, MN (ribbon cutting February 18, 2017).RSDP supported the construction of five DWG 2.0s with the following community partners: The Center for Sustainable Building Research designed the earlier DWG 2.0 following an analysis of the performance of several early DWGs in use across Minnesota. The University of Minnesota Extension Regional Sustainable Development Partnerships, as part of a statewide initiative to advance DWG technology, have worked with the College of Design's Center for Sustainable Building Research to develop construction documents for two DWG designs. Crops well-suited to DWG production include a variety of lettuces, herbs, brassicas, asian greens and sprouts. This heated rock bed is a thermal mass that acts as a heat battery and stores heat for when it is needed at night.ĭWGs in Minnesota can be used to grow crops that thrive with minimal light, providing year-round production capacity for small-scale farmers and gardeners. The sun heats the air inside which is blown underground with a fan and stored in rocks. This wall is specially angled, depending on latitude, to get the most possible solar energy on the coldest day of the year. DWGs are built in an east-west position, with a glazing wall that faces south. There are a few important aspects of the design that make this possible. DWGs are passive-solar greenhouses that rely on energy from the sun to heat the building instead of more traditional heating sources. A Deep Winter Greenhouse (DWG) is a greenhouse designed to limit the amount of fossil fuel it takes to grow crops during cold winters.
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