https://techcrunch.com/2023/10/24/harvest-thermal-heat-pumps-seed-round/

In the last year or so, heat pumps have gone from being little known outside of HVAC circles to becoming a key plank in the Inflation Reduction Act. Today’s heat pumps are vastly superior to those deployed decades ago, but one startup thinks there’s still ample room for innovation.

Harvest Thermal isn’t tinkering with the heat pump itself, though. In fact, the company uses an off-the-shelf system in all of its installations. Rather, it has developed a small add-on about the size of two shoeboxes that allows the heat pump to run when electricity is cheapest and cleanest.