Just as climate and environment vary from one region to the next, so do construction techniques. Coastal houses are often built on piles or poles to elevate them above potential flood waters. Crawlspace foundations are common in NC, SC, AR and OR, while slab foundations are common further south with basements common further north. With climate variations from hot and humid, to marine, to hot and dry, to cold, each of these has the potential to affect how a material, system or technology performs.
Examples of potential product issues are: Energy Recovery Ventilators may work well in the Northern U.S., but may not perform as expected in warm, humid climates because of the smaller temperature differences combined with higher moisture loads. Vented attic may work well in cold climates in addressing ice damming, but may increase moisture loads and duct sweating in warmer climates.