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      <image:title>What is a British thermal unit? Why do we use BTU to measure heat for Cast Iron Radiators?</image:title>
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    <loc>https://castironradiatorsusa.com/blogs/learn-more-about-your-heating-system/cast-iron-radiators-hot-water-steam-system-vs-hvac-system</loc>
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      <image:title>Cast Iron Radiators (Hot Water / Steam System) vs HVAC System</image:title>
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