The Orchid Doctor Articles under the Heading Solar Chimney

Solar Chimney Comments
SOLAR CHIMNEY: A Ventilator for Greenhouses It harnesses the heat of the sun for a chimney 2 feet square rising 12 feet above the greenhouse roof, painted black on the inside except for the south exposure which is glazed, with a trap at the base which is level with the roof and which opens when an updraft is caused by the sun heating the chimney; the hotter the temperature, the greater the updraft; all details, refer to AU84-11 0

New Topics

  1. Fritz wilke asked question What kind of orchid is this? in category General Discussion
  2. Robert Stagner asked question cattleya mossiae Willowbrook in category General Discussion
  3. Judith Pariseau asked question Paphiopedilum culture differences in category Paph Alliance
  4. Marc Lefkowitz asked question Bulbophyllum in category Bulbophyllums
  5. Tony Borowiecki asked question Can a Bealleara re-flower in category Oncidium Alliance

New Comments

  1. Robert H. Findlay commented on member plant Oncidium Sherry Baby by Luesa Estrada
  2. Judy Bailey commented on topic "Paphiopedilum culture differences " by Judith Pariseau
  3. David Hickman commented on topic "Mystery Orchid" by David Hickman
  4. Carol Holdren commented on topic "Bulbophyllum " by Marc Lefkowitz
  5. Carol Holdren commented on topic "Can a Bealleara re-flower" by Tony Borowiecki
  6. Carol Holdren commented on topic "How to care for my new orchid" by Sylvia Spence
  7. Bodil Bruus commented on member plant Ctt. Mrs. W. N. Elkins var. coerulea by Linda Thorne
  8. Jan E Teitsworth commented on topic "Can anyone identify this orchid?" by Jan E Teitsworth
  9. Carol Holdren commented on topic "Brassolaeliocattleyamaianh " by Kim Loan T Nguyen
  10. David garcia commented on member plant Myrmecophilia tibicinis stromburgkia trumpet player by David garcia