Older style kerosene heaters do increase humidity. Electric heaters do not - they tend to reduce humidity.
Humidity is a condition of a gas, you add moisture to a gas to increase it's humidity and dry it to reduce the humidity when air gets to 100% humidity it may rain?
An a/c does not dehumidify, it cools the air. If you need less humidity get a room dehumidifier.
You can reduce the air humidity is less oxidizing metals.
It's actually the wick that is most important when discussing candles. Find candles that have a wick with a high zinc content, they produce less smoke. Also, keeping the wick trimmed short will reduce the amount of smoke the candle produces.
An air conditioner is a very effective de-humidifier. If you put the temperature setting at neutral, it won't cool and it won't heat, but it will effectively remove lots of humidity.
Yes Air Conditioning Reduces Humidity. If you have a space AC unit, you will see that there is a containing at the bottom that needs to be emptied when full of water. That water is taken from the air. Causing a dehumidifying effect.
Air conditioners are needed in hot climates to reduce the temperature and humidity of the air. Humans like to be comfortable.
If its a warm day and you reduce the humidity in the given space evaporation will be easier because the air can now take on more water until it reaches the dew point or saturation for the given temperature and atmospheric pressure.
The collective nouns for candles are a pair of candles or a mint of candles.
Heating the air reduces the relative humidity. It doesn't change the amount of watervapor in the air. But warm air is able to hold more water vapor than cold air can, sowhen you heat the air, the air becomes 'less full' of water vapor, which means lowerrelative humidity.
Dehumidifiers are produced by many manufacturers throughout the world there are industrial class dehumidifiers as well as personal use models. You must determine the size of the unit you need before you can compare the amounts of humidity needed to be removed.