Before central air and heat, wool regulated air temperatures in homes and offices, in winter and summer.
Wool carpet, being a natural fiber, wears differently and installs differently than other fiber carpets. There are four different types of construction, generally speaking. One is tufted wool, which consists of wool fiber being tufted into a primary backing, with a secondary backing added to that for stability. The second type is a woven velvet. The term velvet refers to the construction of the components, rather than a smooth surface, which is what comes to mind for most people. The third is a Wilton. Wilton is generally manufactured with a five frame construction, making it a more durable carpet. The forth type is Axminster.