My heat pump has a CoP of 3 and paid for itself in 10 years. New heat pumps have a CoP of 4 or higher and might pay for themselves in less. How much material i

My heat pump has a CoP of 3 and paid for itself in 10 years. New heat pumps have a CoP of 4 or higher and might pay for themselves in less. How much material in a heat pump is recyclable and how much isn't, compared to a furnace? We are trying to reduce CO2 and methane in the atmosphere. Throwing away the non-recyclable parts of heat pumps isn't as big of a concern. Polluting the ground and water isn't even as big a concern. Certainly they are concerns, but they pale in comparison.