Citing an Arizona housing construction boom that’s complicated by supply-chain snags and a labor shortage, five members of Congress from that state are seeking to postpone the implementation of new energy efficiency standards for central air conditioners and heat pumps.

If the Department of Energy’s 2023 standards take effect January 1 as planned, months-long delays in completing homes could result “while the manufacturers and the supply chain figure out what they are doing,” the five wrote to Jennifer Granholm, the energy secretary, in a letter dated July 20.