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A typical "portable" dehumidifier can be moved about on built-in casters. A dehumidifier is an air conditioning device which reduces and maintains the level of humidity in the air. [1] This is done usually for health or thermal comfort reasons or to eliminate musty odor and to prevent the growth of mildew by extracting water from the air. It ...
For health reasons it is crucial to breathe clean air, free from chemicals and toxicants as much as possible. It is estimated that humans spend approximately 90% of their lifetime indoors [8] and that indoor air pollution in some places can be much worse than that of the ambient air.
The amount of ventilation in an ETS area is equal to the amount of an ETS-free area plus the amount V, where: V = DSD × VA × A/60E V = recommended extra flow rate in CFM (L/s) DSD = design smoking density (estimated number of cigarettes smoked per hour per unit area) VA = volume of ventilation air per cigarette for the room being designed (ft ...
A disc wheel style (bypass) is very similar in design to the drum style humidifiers; this type of furnace humidifier replaces the foam drumming with a number of plastic discs with small grooves on both sides. This allows for a very large evaporative surface area, without requiring a great deal of space.
Small air handlers, for local use, are called terminal units, and may only include an air filter, coil, and blower; these simple terminal units are called blower coils or fan coil units. A larger air handler that conditions 100% outside air, and no recirculated air, is known as a makeup air unit ( MAU ) or fresh air handling unit ( FAHU ).
They conclude 15% of the space conditioning energy use can be saved in the UK context going from 11.5 m 3 /(m 2 ·h) @50 Pa (average current value) down to 5 m 3 /(m 2 ·h) @50 Pa (achievable). Given its impacts on heat losses, good building airtightness may allow installation of smaller heating and cooling capacities.
The average time elapsed since molecules of air in a given volume of air entered the building from outside. Concentration The quantity of one constituent dispersed in a defined amount of another. Concentration, tracer gas The volume or mass of tracer gas divided by the volume or mass of air plus tracer gas. Outdoor air
This is the biggest non-radiative cooling effect at the surface. It compensates for roughly 70% of the average net radiative warming at the surface. Second, water vapor is the most abundant of all greenhouse gases. Water vapor, like a green lens that allows green light to pass through it but absorbs red light, is a "selective absorber".
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