Active night chill

Baseline strategy · No score

Use fans, pumps or controls during the night to discharge accumulated heat when external conditions are favorable.

Subject: Thermal systems and ventilationContext: Buildings · Offices · IndustryCost: mediumEffort: highLevel: recommendedStage: design or operationMaturity: context-dependent
Principle of Enfriamiento nocturno activo
Operating principle

How it works

Use fans, pumps or controls during the night to discharge accumulated heat when external conditions are favorable.

It meets thermal and indoor air needs after reducing demand, through sized, controlled, maintainable systems compatible with decarbonization.

When does it make sense?

  • After reducing loads and defining health and comfort requirements
  • When partial load and year-round performance can be compared
  • With access to commissioning, maintenance and monitoring

How to apply it

  1. 1

    Defining what need resolves "active night chill" and establishing a starting situation.

  2. 2

    Compare alternatives and adapt design to climate, use, regulation, affected people and available resources.

  3. 3

    Apply with clear responsibilities, check the actual result and correct unwanted effects.

Potential benefits

Thermal comfort

Healthier indoor air

Lower consumption and power

Limitations and precautions

  • The result depends on context, design, execution and how it is used and maintained.
  • Nominal efficiency does not guarantee the performance of the entire system.
  • Dimensions, refrigerants, noise, hygiene, controls and maintenance should be evaluated.

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