Heat pumps {just like smart meters} I wouldn't thank you for either.
Just read of an old couple who were one of the very first to have a heat pump installed many years ago. It was installed with help from a government grant and yes {along with solar panels} saved them money over the years, but now their heat pump is reaching the end of it's life and needs replacing. Unfortunately for them the government grant is only given for the first initial heat pump installation so a replacement is going to cost them an arm and a leg. They have had quotes for a replacement and all in the region of £17,000, so what monetary savings were made over the years seemed to be a waste of time.
So by all accounts trying to sell your house with a heat pump will more than likely be a hindrance than an asset.
I first noticed the price difference on the Rykneld homes site months ago. Most of the older properties for rent had a rent of between £85 to £100 per week, they built some new o.a.p. bungalows I believe in Danesmoor with these heat pumps fitted and the rents for those were in the £150 + p/w mark.