Is an R-19 Wall Really R-19?
Just because a wall has R-19 insulation in it does not mean it's an R-19 wall. Using the R-value of the insulation between the studs (the "cavity R-value") as an overall wall R-value is similar to using the center-of-glass value for a window--it ignores the effect of framing. [continue reading]
Advanced Two-Stage Design Hits the Market
Until recently, most residential two-stage evaporative coolers were of the down-discharge variety and were generally installed on the roof. [continue reading]
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