DRAFT — outline only. Do not publish until the figures below are verified. Keep this guide inactive until it is written.
Angle: The core buying decision between the two water-heater technologies.
This guide must answer: - How do ETC and FPC differ in build and performance? - Which handles NCR winter and water quality better? - What's the price difference? - Which to default to locally.
Writing rules: answer the question in the first two sentences, put a real number in the opening paragraph, name the specific city or DISCOM where the answer varies, and link to two related guides and the relevant category page.
Verify before publishing: Tech comparison specifics; keep accurate.
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Last updated 4 August 2026 · Reviewed by the RenSetu team