Thank you for your interest in a water heater replacement. Due to changes in water heater manufacturing standards we do need to see the current installation of your unit. If you are unable to provide photos, you can always call our office to set up a time for an estimator to come and give you an estimate. If you are interested in a Tankless system or a 75 gallon or larger capacity, an estimator is required to come out and assess your set up. Please all the office at 734-663-0204 and press option “2” to reach the sales department. Thank you!