If you click the read more link you will clearly see the policy as stated from the Goodman Manufacturing Company about their equipment.
You can read the original article on their site at: http://www.goodmanmfg.com/Default.aspx?tabid=594
GOODMAN POLICY CONCERNING ONLINE SALES TO CONSUMERS
Homeowners using the Internet to locate information regarding residential heating, ventilation and cooling (HVAC) systems may discover several sites offering a direct-to-homeowner purchase opportunity. HVAC systems and components are designed to be installed by qualified HVAC technicians. The installation of HVAC systems includes electrical, gas, and refrigerant connections, is generally regulated by a multiple sets of laws, codes and guidelines, at the federal, state and local levels. Further, the failure to properly install HVAC equipment can raise personal safety and performance concerns.
Internet Sales Policy
The sale of HVAC equipment manufactured by the Goodman Global, Inc. family of companies (which includes Goodman, Amana and Quietflex branded products) (“Goodman Equipment”) to consumers over the Internet, including without limitation through online auction sites, is strictly prohibited. Further, no warranty is offered on Goodman Equipment purchased by consumers over the Internet, including web-based auctions.
This policy is necessary to ensure that Goodman Equipment is installed properly, in compliance with applicable laws, rules and codes, and in a manner that addresses safety concerns and the proper performance of Goodman Equipment.
As outlined below, the failure to comply with this policy could lead to violations of applicable law that are punishable by fines.
Licensing and Permitting Requirements
It is common that an HVAC installer must be licensed by the state or municipality in which the HVAC equipment is to be installed. Some jurisdictions may, in addition, have permitting requirements. (Consult your local laws and rules to determine the requirements imposed by your jurisdiction.) Further, local building codes often require that specific types of HVAC connections be made by licensed professionals. For example, licensed plumbers may be required to make any gas or water connections necessary in the installation of an HVAC system; and licensed electricians may be required to make all electrical connections to the HVAC system.
Refrigerant Guidelines
All HVAC cooling equipment and systems require the use of a refrigerant gas that is compressed and liquefied during the cooling cycle. The two most common refrigerants in the HVAC industry are identified as R-22 and R-410a. Federal, state, and local laws and guidelines are applicable to the introduction, reclamation, and recycling of these refrigerants. Violation of such laws may result in fines to any non-licensed or non-certified HVAC installer. Consult your local laws and guidelines for full details.
Consumer Protection Laws