Category Archives: HVAC


Increasing Humidity Indoors

A humidifier is a device for increasing the humidity indoors.

Amazon ImageEspecially in the winter months often falling relative humidity below recommended for living and working spaces range from 40% RH (see also comfort ). This low humidity has a negative impact on the well being of humans and animals and can be very durable dry indoor air and diseases of the respiratory system favor.

Also for furniture, wood floors and antiques, the dehydration can be harmful. This effect can be counteracted by the use of humidifiers.

Distinguished from these appliances Humidifiers are in health care, medicine and nursing. There is about the humidification of the air we breathe by artificially ventilated people to protect mucous membranes.

With use of humidifiers also increases the demand on the health, as these support increasing humidity and microorganisms or germs.

Amazon ImageSometimes, the opposite effect is desired, such as in museums, in order to slow the aging of paintings and other artifacts.

There are dehumidifier or combined air conditioners which are often used.

Evaporators bring water to boil and add the vapor into the air. Their main characteristics are:

  • relatively high energy consumption
  • relatively high humidification
  • hygienic because of the evaporation in the water is if germs are killed

Risk of condensation precipitation in unfavorable installation and cool environment,

At a high lime content in the water: danger of lime deposits in the unit, maintenance,
Risk of inhaling aerosols.

When calcification is a risk that the water is not sufficiently heated and bacteria is abetted.

Amazon ImageRisk of over-wetting, and control necessary. Danger of scalding by the escaping steam.

When electric steamer Denver are located directly in the water tank two electrodes between which a current flows through the water. Thus the water is heated to the boiling point between the electrodes.

These devices can not distilled operable or demineralized water, as this, the necessary electrical conductivity missing.

Usually a small amount of water is fed from a reservoir into a vaporization chamber.

There is an electrical heating element that is similar to a hot plate operates. The current then flows through a heating coil. Some devices can be provided to facilitate cleaning with a covering of non-stick coated material.

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Devices of this type can be operated with demineralized water, to avoid the attaching of minerals.