Home - Rheem Hot Water Rheem, hot water, service, gas hot water, solar hot water, electric hot water, heat pump, rebates, view, products, water, warm, gas, electric, solar, heat pump,warm water, boiling water, chilled water, filtered water, Australian manufacturing Australia’s favourite name in hot water since 1939. Choose the right Rheem for your home. Efficient designs. Long-lasting materials. Plus you’ll find a range of choices unmatched in Australia.