Arrived on site customer interested in installing a tankless. Upon inspection found that the gas line will need to be increased to 1-1/4 up to the tee that is feeding the boiler and tankless. We will need run exhaust through the roof and customer will need to get a roofer to install the roof boot and air intake will be ran out the side of the home. Gave. Options and customer is getting a few other estimates before making a decision. Waived visual diagnostic fee