Hi I had a visseman boiler fitted april 2024 small semi 30 yearold house , boiler in bathroom , sadly takes ages for any hot water in kitchen sink about 3.5 bowls before it gets hot , if I run a bath or turn heating on then that's not a problem, engineer who fitted it says its normal na rubbish renovated a good few houses which are twice the size never had a problem only started using visseman in April any help or advice welcome