Series Three™ tankless electric water heaters deliver endless hot water for multi-fixture applications. Unit options are available for applications that require a factory-set temperature and also for multiple lavatory and sanitation applications. Series Two models deliver a 65 °F temperature rise at 3.0 GPM. Models with the “T2T” suffix have a maximum flow rate of 4.0 GPM and feature staged heating modules. Models with the “T3” suffix have a maximum flow rate of 5.0 GPM, feature parallel heating modules and are recommended for commercial use only.