These heat pumps can be installed in an hour—and will cut costs in half

Five years ago, while working at Apple as a product designer, Mary Ann Rau decided to electrify her house and move away from fossil fuels. She installed solar, a battery, an induction range, and owned an EV. But there was still one big challenge: her HVAC system. “When it came to heat pumps, I was shocked when I got a quote for $40,000 to install heat pumps in my own house,” Rau says. Today, Rau launched a startup that’s tackling the problem of making heat pumps more accessible. Merino Energy...