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A nation that can't control its energy sources can't control its future. Barack Obama

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  • Common sense tells us that eliminating unnecessary venting will save energy. However, putting this theory into practice is not as simple as it sounds, especially when humidity control is a key requirement. Heating and ventilation set-points Well-developed plants and milder spring weather conditions mean that like most tomato growers, our Focus Nurseries now have an almost constant demand for humidity control. Read More...
  • The graph below shows energy use over the course of a day in February at R&L Holts (one of the GrowSave Focus Nurseries). It is a perfect illustration of how things should operate when a thermal screen is set up correctly! (Click on the graph to see a larger version)                     Read More...
  • Reducing minimum pipe temperature settings is a good way to save energy. However, this must be done alongside well considered ventilation settings to ensure that heating requirements are minimised. The example below shows what happened at one of our Focus Nurseries where humidity influences and minimum ventilation settings were reducing the effect of a good minimum pipe temperature strategy. Read More...
  • Using degree day analysis enables you to account for weather and greenhouse temperature influences when looking at your energy use.  The graph below shows an example of degree day analysis Hornsfield Nursery (one of the GrowSave Focus Nurseries), beginning January 2008. Read More...
  • Avoiding condensation on plants is a key part of any disease control strategy. Poinsettia growers have to pay particular attention to this problem as they use a technique to control plant height called ‘Drop’. ‘Drop’ involves reducing the greenhouse temperature to as low as 12 degrees C before sunrise and is followed by an increase in the greenhouse temperature to the daytime set point within one hour after sunrise. Read More...

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