Water heater(s) shall have a storage capacity of _________ gallons, a minimum input rating of ________ Btuh and recovery rating of ________ GPH at a ________oF temperature rise.

• 所要订购的热水器容积为________加仑,最小输入热值为________Btuh,水温恢复效率为________GPH(以水温升高______oc为标准)。