I'm the the process of getting a new kitchen. Currently have an old oil boiler in it (13 years old)
Not on mains gas, but can get connected relatively easily - I was initially thinking of buying the bullet and getting a combi boiler in the roof as the plumber says that although oil is cheaper ATM, gas is more efficient.
Then I started thinking of greener alternatives but I don't think an air pump will give enough heat. Possibly ground source could be an option although it creates some mess!
WWYD?!