What is the best way to heat water in cold mountains? The answer lies not in water heated directly by electricity, gas or fuel oil – especially if you are operating a big hotel.
There is a cheaper – and more eco-friendly – way by using “free heat” from the atmosphere. And this is harnessed by running a huge “fridge in reverse”!
Already a subscriber? Log in
The Star Festive Promo: Get 35% OFF Digital Access
Cancel anytime. Ad-free. Unlimited access with perks.
