solar water heater for warm climate

Warm Climate

The ProgressivTube passive system is the most cost efficient water heater and it works well in the entire area shown above. This system should be the only logical choice for the southern states as it provides 80-90% of solar water heating needs in the darker area shown above, 60 to 70% in moderate climate areas and 50% in the northern colder states. The ProgressivTube can only be subject to freezing in the areas where hard freeze months exist, and drainage would be used to protect it during these periods.