The Spa Components 5.5 kW flo thru heater is designed for compatible 15 inch by 2 inch 230 volt applications used with Brett Aqualine EM100 and EM190 systems. A correctly matched heater is useful because it helps restore the intended heating capacity without forcing plumbing or control compromises during replacement.This unit is especially useful when the original heater has failed, is heating inconsistently, or no longer supports dependable spa performance. Keeping the replacement aligned with the intended voltage, size, and compatible equipment family can make service much smoother.It is a strong choice when a higher-output replacement heater is needed to bring a compatible spa system back to proper operating condition. Spa Components 5.5 kW flo thru heater 15 inch by 2 inch format with 230 volt operation Designed for compatible Brett Aqualine EM100 and EM190 systems Useful when the original heater is failed or unreliable Supports cleaner installation and dependable heat restoration