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Dew Point Calculator

Dew point approximation for condensation calls.

Inputs

Inputs and assumptions

Room or outdoor dry-bulb.

Hygrometer reading; formula valid above 50%.

Result

Dew point (F, approx)
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What to check

  • Dry-bulb temp
  • RH above 50%

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Screening estimate only. Verify nameplate ratings, measurements, and installer quotes before making a decision.

Saved calculations

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