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Cooling and Ventilation
16/9/2009
drewlandis
Around the Backyard Post
As we move into greenhouse season, many people are going to be purchasing or building their very own greenhouses to protect their plants over the winter. They will spend a signifigant amount of time sizing up all of their options, comparing features and prices, looking at the pros and cons of different coverings. Usually they are going to purchase a heater, especially if they are planning on growing (as opposed to just overwintering) this winter. But there is an oft overlooked system that can...
7/8/2009
IGCadmin
Around the Backyard Post
To size an evaporative cooling system, you first need to find the CFM (cubic feet per minute) requirements. CFMs are essentially just the volume of air in your building, the standard being that you want to move the entire volume of air within one minute.
Finding your CFMs:
Length X Width X Height = CFM (As a rule, we typically use 12 for the height value in this equation.)
Let's assume a 30'x48' structure:30 X 48 X 12 = 17,280 CFMs
Using this you can size your fans, inlet shutters,...
23/2/2009
IGCadmin
Around the Backyard Post
It may seem absurd at this point, when the temps for some of us are still dipping into the teens at night, to begin talking about shade and cooling. But this is precisely the time when you should begin analyzing your greenhouse and garden plan to make sure you have enough cooling to protect your plants from the brutal heat of summer. Judging from the shade cloth inquiries we've been receiving, many of you are doing just this.
Shade cloth is a extremely versatile product. It...
