Heat pumps are a new technology, should I wait until the technology is proven?

Sadi Carnot and his paper describing the Heat Engine 

Is the UK too cold for Heat Pumps?

If you have a fridge you have a heat pump. Heat pumps have actually been around for a really long time. The groundwork for heat pumps was carried out by a French physicist in the early 1800’s named Sadi Carnot who developed a mode for a heat engine that could run in reverse to transfer heat from a colder to a warmer body. In the 1850’s Austrian engineers were starting to develop heat pumps that actually worked in drying salts and then into modern times in the 1930’s Heat pumps started to appear in American modern homes, gaining traction in Europe during the 50’s and 60’s. The boom time for heat pumps occurring during the energy crises of the 1970’s. So heat pumps have been around far longer than what people imagine. Most homes in the UK have a fridge which is basically using the same heat pump technology. Heat pumps absorb the heat from the air surrounding us and increase its temperature without burning any fossil fuels which benefits our environment and does not add to global warming.