HEATKEYS

HVAC FOR BEGINNERS, A Hand To Guide You Through The Hvac Maze

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DIY Repair and Home Improvement forum. Helping You to Do It Yourself!

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The #1 HVACR Community

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A journey through the mystical world of HVAC design. A manual J calculation and a manual D calculation can be enlightening. Discover how your home can be as comfortable as you had dreamed.