Comment Comment by slwvx For context: https://en.wikipedia.org/wiki/Thermoacoustic_heat_engineThe company cited in the article is [Bluehart](https://blueheartenergy.com/our-technology)One disadvantage that Bluehart lists of classic heat pumps is the need for a refrigerant fluid. But Bluehar uses helium internally; I wonder how often the helium would need to be replaced. parent slwvx 6 months ago
The company cited in the article is [Bluehart](https://blueheartenergy.com/our-technology)
One disadvantage that Bluehart lists of classic heat pumps is the need for a refrigerant fluid. But Bluehar uses helium internally; I wonder how often the helium would need to be replaced.