DOAS Dew-Point & Desiccant-Stage Advisor

Tell it the space condition you have to hold. It computes the space dew point and tells you whether an integral-DX dedicated outdoor air system (rated to a ≤55°F leaving-air dew point) can carry it, or whether the design needs a desiccant stage. Psychrometrics run in your browser; nothing is sent anywhere.

Application preset Sets a typical space target — you can override below

Space dry-bulb temperature (°F)

Target space relative humidity (%)

Design confidence Headroom you want above the ≤55°F DX floor

Space condition
Space dew point
Required DOAS leaving DP
Integral DX-DOAS floor	≤ 55°F leaving-air DP (AHRI 920 Cond A)

Get a specific dew-point analysis →

Method: space dew point from dry-bulb + RH (Magnus/Alduchov-Eskridge, ±0.4°C). A DOAS must deliver ventilation air at or below the space dew point; a KA-DOAS integral DX coil is rated to a ≤55°F leaving-air dew point at AHRI 920 Standard Rating Condition A, so it carries any space that holds ≥55°F DP. Below that, a desiccant stage is the right tool. Indicative screening only — confirm against your project loads and worst-case outdoor design condition.

DOAS Dew-Point & Desiccant-Stage Advisor

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