HVAC Sizing Knowledge Hub
Stop guessing. Learn the science behind proper heating and cooling load calculations.
Myth Busting
The "500 Sq Ft per Ton" Rule is Costing You Money
Why the 1970s "Rule of Thumb" fails for modern homes, and the math behind why insulation matters 3x more than floor area.
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The Basics
What is a Manual J Calculation? (Simplified)
The "Gold Standard" for HVAC sizing explained in plain English. Learn the difference between a full audit and a block load estimate.
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Critical Warning
Oversized vs. Undersized AC: Which is Worse?
Think "Bigger is Better"? Think again. Why oversized units cause short cycling, humidity issues, and mold risks.
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More Guides Coming Soon
Upcoming topics: Understanding Delta T, Sensible vs. Latent Load, and Regional Sizing Guides.