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  2. Heat and smoke vent - Wikipedia

    en.wikipedia.org/wiki/Heat_and_smoke_vent

    Storage occupancies - The heat release rate from high piled storage commodities is expected to be very high. In such cases, it is considered by some fire protection professionals desirable to vent the heat from the building if the temperatures in the building reaches sufficiently high levels to endanger the structural stability of the roof system.

  3. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    Most modern hot water boiler heating systems have a circulator, which is a pump, to move hot water through the distribution system (as opposed to older gravity-fed systems). The heat can be transferred to the surrounding air using radiators, hot water coils (hydro-air), or other heat exchangers. The radiators may be mounted on walls or ...

  4. Attic - Wikipedia

    en.wikipedia.org/wiki/Attic

    Louvered attic vent in a gable. Modern building codes permit both vented and unvented attics in all climates, if a building is otherwise correctly constructed. [5] However, unoccupied attics should usually be ventilated [6] to reduce the accumulation of heat and moisture that contribute to mold growth and decay of wood rafters and ceiling ...

  5. Ventilation (firefighting) - Wikipedia

    en.wikipedia.org/wiki/Ventilation_(firefighting)

    Ventilation is a part of structural firefighting tactics, and involves the expulsion of heat and smoke from a burning building, permitting the firefighters to more easily and safely find trapped individuals and attack the fire. It is frequently performed from the outside of a burning building while the fire is being extinguished on the inside.

  6. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    is the heat recovery efficiency - (typically around 0.8 with heat recovery and 0 if no heat recovery device is used). The temperature differential needed between indoor and outdoor air for mechanical ventilation with heat recovery to outperform natural ventilation in terms of overall energy efficiency can therefore be calculated as:

  7. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    A heat exchanger is the part of the system that transfers heat from the hot parts of the machine or a system to the cold parts of the machine or system. heat gain heat load heat loss Terms for the amount of cooling (heat gain) or heating (heat loss) needed to maintain desired temperatures and humidifies in controlled air.