The Murphy-Daley Greenhouses are through their first winter with great results. They are reported to have not frozen during the winter holding onto 40 degree temperatures.
Tomatoes are big on the first of May and the beds are planted. The only issue over the winter was aphids that were apparently brought in on some plants last fall that required a cleaning out of the greenhouse to get rid of them.
Hot water tubes are installed in the growing beds awaiting a hook up to the boiler or solar hot water panels. The water tubes for solar heat storage seem to be doing their job adding to the thermal mass to keep the greenhouse temps from dipping to low. They do not help when the temperature rises though. Two fans were installed in the windows to the house to keep the temperature down during sunny days.
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