I want to replace my methane gas water heater with a heat pump water heater. I also want to avoid refrigerants with a high Global Warming Potential: https://en.wikipedia.org/wiki/Global_warming_potential

This greatly limits my appliance options, although I was able to find a ventless heat pump dryer that meets my specifications, a Blomberg DHP24404W which uses R290 (refrigerant grade propane) with #GWP 3. It works great and that gave me confidence that with enough effort and patience I could succeed.

I found two options: 🧵