United Solar Passive Hot Water Heating System Model:
The RU-25 and RU-50 models are truly a family friend. They deliver most of your hot water free from the sun. Let United Solar Passive RU-50 work for you; adds value to your home investment, works with your electric or gas water heater to save you MONEY! A attractive appearance. You will benefit from a reduction in your power bill.

What else can you buy today that performs so well that it pays for itself?

The heating system is a simple, integrated unit complete with its own collector and heavily waterways. United's Passive System comes completely assembled, ready to go on your roof. The Passive System requires only two connections: COLD WATER IN, and HOT WATER OUT.

The Passive System has no pumps of compressors, no controllers or sensors, no mechanical devices, or motorized valves. There is virtually nothing in the United Passive System to wear out or break down! The stainless steel is rugged, dependable, and the best money can buy. Electrical and gas heaters cost money to operate...FOREVER! In this case, solar takes only a few years to pay for itself.