Eric Aune walks us through the installation of a CO₂-based split system heat pump for water heating. The presenter details the steps for prepping, plumbing, wiring, and testing the unit, which stores hot water in an 83-gallon stainless steel tank. The setup includes a thermostatic mixing valve for safety, a thermal expansion tank, and cold-weather protections. The outdoor unit handles all heating, reducing indoor noise and complexity. The system is highly efficient, using low-GWP refrigerant and minimal electricity inside the home. Despite tight space and some unfamiliar fittings, the install was successful, and the unit performed impressively in cold conditions.