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26 May 2026
R290 All In One HPWH 500L Dark Knight series
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Tired of choosing between low-efficiency water heaters that drain your profits, or complex systems that can’t scale with your business? Meet the FORLSSMAN R290 500L All-in-One Heat Pump Water Heater Dark Knight — the eco-friendly, high-performance solution built to power hotels, gyms, multi-family buildings and small businesses.
It combines R290 natural gas, A+ (XXL) ERP efficiency, a 500L integrated tank, and smart cascade technology (up to 8 units / 128kW total) to deliver consistent, low-cost hot water — and grow with your demand, no system replacement needed.