Hello Tom et al, One way of bring in a little cooler air might be to use some Jet Fan tubes and a fan from the outside. Typically the fan is overhead in the middle of one far wall. When cooling is needed, a solenoid pulls open the metal louvers, the fan just inside kicks on and blows outside air into a plastic tube usually about 1 1/2 feet in diameter with two rows of holes near each other to direct where you would like the air to go. You could also have a low power motor open a solid louver outwards as another option. The latter version would seal better where there are cold, strong winds.
One negative of setting this up as we have them at work, is that there would be a large open area in the wall where cold wind could blast in as the fan is mounted a few feet away from the louver (for air mixing) and really cold air does drop down when the vent is open (you can see the fog dropping right down and can see the crispy plants right where this air hits). Our setup with fans/large tube might be too large, but there may be smaller systems that can be had for smaller houses. If the fan were mounted and sealed directly on the wall in front of the louver, then only the air coming out of the vent tube would get in. If you wanted to pull down heat from above but didn't want to cook things below, it might still be good to have a tube pulling air down from above and be directed underneath, but have a small vent from outside be pulled through another tube and mix with the above air. A thermstat of sorts could be placed in the air stream coming from above (after the mixing zone) that could open or close the spot that allows the cold air in, keeping it from getting too hot. Otherwise maybe putting some cold water through pressurized mist right in with the hot air might help in keeping it from getting too hot. If a vent tube were put on the floor just inside the wall, then water could be misted or cold air mixed right inside this tube, and the adjusted air could be sent down the length of your house, moving up from the floor. hope this helps, charles -- charles ufford oriskany, ny usa _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
