What are solar heating systems are classified as?

What are solar heating systems are classified as?


What are solar heating systems are classified as?
Goal of many more ‘green’ jobs is elusive
Kansas has set its sights on creating 10,000 green jobs, many of them from manufacturing and assembling the parts for wind energy turbines. The state’s big bet on wind power has attracted a few hundred jobs so far. But even that success shows the huge challenge Kansas faces.
What are solar heating systems are classified as?

I can’t find this one in the book….
it’s either
a.) positive and negative
b.)active and passive
c.)AC and DC
or
d.)active and indirect…..
please help me out on this one…….

b. active and passive

LB Heating Installs Viessmann Solar Heating System

Heating For Home

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