Yes, it is! The first absorption heat pump was invented in 1858, and has been used in larger applications, both heating and cooling, ever since. And highly efficient gas burner technology has been around for decades. So, it’s a combination of systems that have been used for many years. The GAHP itself has been fitted in all kinds of applications for the past decade, thoroughly tested and put through its paces. It is only recently, however, the technology has been scaled down to fit for domestic applications. GAHPs are a safe, effective and highly efficient means of adding renewables to older homes.