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Green Plumbing

Category - Caring for Our Planet

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What is the ratio of carbon dioxide (CO₂) produced annually by the following (in order): conventional electric, conventional gas, and tankless gas water heaters?

5-5-2
2-5-8
8-2-1
20-15-2

Explanation

Answer: C - On average, conventional electric water heaters produce eight tons of CO₂ annually; conventional gas and tankless gas water heaters produce an average of two and one tons, respectively. Solar water heaters produce only trace amounts of CO₂ and are the best option for minimizing greenhouse gas emissions.

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