Space constrained products
means a central air conditioner or heat pump:
(1) that has rated cooling capacities no greater than 30,000 BTU/hr;
(2) that has an outdoor or indoor unit having at least two overall exterior dimensions or an overall displacement that:
a. are (is) substantially smaller than those of other units that are
i. currently installed in site‐built single family homes, and
ii. of a similar cooling, and, if a heat pump, heating, capacity, and
b. if increased, would certainly result in a considerable increase in the usual cost of installation or would certainly result in a significant loss in the utility of the product to the consumer; and
(3) of a product type that was available for purchase in the United States as of December 1, 2000.