Appolo Heating is proud of our industry affiliations and certifications from the leaders in the HVAC industry. Below are a few of the memberships and certifications that we currently hold. Lennox Premier Dealer At Lennox, we are dedicated to delivering the highest possible levels of reliability. As testament to this commitment, you’ll find the Good Housekeeping Seal on most Lennox® products. As one of the most widely recognized symbols of consumer quality assurance, the Good Housekeeping Seal adds to Lennox’ reputation as a name you can trust. Good Housekeeping The Good Housekeeping Seal is issued by the Good Housekeeping Research Institute, the product-evaluation test laboratory of Good Housekeeping magazine. All Seal-bearing products are backed by the magazine’s two-year limited warranty* for replacement or refund if defective.