Took our money and fitted the boiler a coupl of days later. They seemed in a rush to get off to help someone on another job. There was also a lot of Google use and phoning a helpline to work out how to install the Nest thermostat as they had not done one before. The cupboard door they took off was not put back on and when my partner arrived home and went to do it, only a few of the screws had been left on the windowsill, the others were missing. The smoke alarm was also left covered up. 2 months on the flue has let water into the house and all over the new boiler. No one from Heatable calls back, you have to keep chasing them and the engineer who was meant to arrive today didn't show up and put his phone to voicemail. £1800 for a leaky boiler with a warranty that isn't valid due to an incorrectly fitted flue! I don't recommend them.