Cooling Tool
Check server inlet temperature, relative humidity and dew point against simplified ASHRAE-style operating envelopes.
Quick Answer
Select an equipment class, enter temperature, relative humidity and altitude. The checker estimates dew point, applies altitude derating and reports whether the selected envelope is inside or outside limits.
Environmental Inputs
Use measured inlet conditions at the IT equipment intake, not room thermostat readings.
Use this for project-specific or vendor-specific screening ranges.
This checker is a simplified screening tool. Confirm final limits against the exact ASHRAE edition, equipment vendor class, warranty requirements and project specifications.
Reference Table
Use these values for quick planning checks only. Real equipment support may be narrower.
| Envelope | Temperature | Relative humidity | Dew point | Use case |
|---|---|---|---|---|
| Recommended | 18–27 °C | 8–60% | -9–15 °C | Normal efficient operation target |
| A1 | 15–32 °C | 8–80% | -12–17 °C | Enterprise IT equipment |
| A2 | 10–35 °C | 8–80% | -12–21 °C | Broader allowable range |
| A3 | 5–40 °C | 8–85% | -12–24 °C | Extended allowable range |
| A4 | 5–45 °C | 8–90% | -12–24 °C | Wide allowable range |
Formula / Method
The checker estimates dew point from dry-bulb temperature and relative humidity, compares measured inlet conditions against the selected envelope and applies simplified altitude derating where relevant.
Dew point uses a Magnus-style approximation from temperature and relative humidity.
Inputs
Use equipment class, measured server inlet temperature, relative humidity and site altitude. Custom X-envelope limits can be used for vendor-specific or project-specific checks.
Uses
Useful for technical-room checks, server inlet audits, cooling alarms, humidity review, handover notes and early environmental screening.
FAQ
No. This is a simplified planning checker. Always verify final limits against the exact ASHRAE edition, vendor documentation, warranty requirements and project specifications.
Use server inlet temperature where possible. Room thermostat readings can hide hot spots, recirculation, poor airflow or rack-level temperature differences.
Dew point helps screen condensation and humidity risk. Temperature alone is not enough for environmental review.
Learn More
Project
ITCOREOPS can support cooling checks, rack airflow review, rack power planning, structured cabling, documentation and operational handover.
Disclaimer
This checker is a simplified screening tool. It does not replace official ASHRAE guidance, vendor documentation, warranty review, HVAC engineering, commissioning, monitoring or site-specific environmental validation.
Workflow
Use this checker before changing cooling setpoints, accepting higher temperatures, documenting environmental alarms or validating technical-room conditions.
Support
For cooling checks, rack airflow, rack power, structured cabling and operational infrastructure support, visit ITCOREOPS.
Feedback
Report display problems, calculation issues or suggestions for improving this checker.
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