Four oz beers of your choice! This type of boiler should suit all but the largest houses. When i called you and you were honest and advised me it would be - hours for call out due to my location, i knew when you turned up on time that i would be happy with your service i was, thank you! Easi-plumb are looking for gas safe engineers. Most policies won't pay if your boiler's croaked as it's not been properly maintained. Watch out.