The publication includes details from new studies and experiments on the systems, along with insights from manufacturers and engineers familiar with their use.
Eligible contractors must be members in good standing with the association for at least the past three years and fill out the application at www.contractorsoftheyear.com.
Kevin Tindall, owner of Tindall & Ranson Plumbing and Heating in Princeton, N.J., and vice president of the Plumbing-Heating-Cooling Contractors National Association, testified before the House Small Business Committee.