Consumer Choice on Trial: The Next Battle Over Natural Gas Appliances

More states are weighing rules that would limit or ban natural gas furnaces, water heaters, and other gas appliances, and the legal fight over these rules is still unsettled. In June, the Supreme Court sent a federal case over efficiency standards for 95% furnaces and commercial water heaters back to a lower court for reconsideration, meaning the rule stays in place for now but its future is uncertain. Separately, an appeals court upheld New York's law requiring new buildings to go all-electric, along with a similar New York City rule, which could encourage other states to try the same in 2027.

A trade group representing HVAC equipment distributors argues that even where these mandates are legal, they can backfire if compliant products aren't actually available to buy. Colorado passed a rule limiting gas appliance emissions, and it ended up cutting off options for people with propane heat and manufactured homes, because low-emission products for those situations weren't on the market in enough supply. Colorado lawmakers later had to carve out exceptions for those cases.

For a homeowner, the takeaway is that rules on gas appliances vary a lot by state and are still shifting, particularly for anyone in a manufactured home or on propane service. If you're in a state considering restrictions on gas furnaces or water heaters, it's worth checking whether exemptions or delayed start dates apply to your situation before you're stuck choosing between limited options at replacement time.