Why are only some products available for purchase directly through the Efficiency Works Store (“Add to Cart” available)?

The Efficiency Works Store allows you to compare thousands of appliances and products by price and Enervee Score (energy efficiency). Many of the products without an “Add to Cart” button can be purchased from the retailers listed on the product page. However, there are specific products, such as thermostats, currently available for purchase directly from the Efficiency Works Store from one of our fulfillment partners.