As long as you wish. 75 degrees is a safe temperature to store ammo in. Low humidity makes for good conditions to store ammo in.
75 degrees F OK that's fine for temperature but what is the ideal room humidity percentage? Actually, most building codes only require you at keep the temperature at 68 degrees, which is ideal. The ideal room humidity percentage is usually around 50% ASHRAE Standards: 68-74F @40-60% relative humidity in the Winter 73-79F @40-60% relative humidity in the Summer
Yes
The usual design humidity for an indoor swimming pool is 50% RH when unoccupied and 60% RH when occupied Peter Fenton. Consulatant. Indoor-Pool-Design.com
The most popular indoor temperature is 72 degrees.
With an indoor pool (not a spa) room air temperature should be maintained 2-5 degrees above the water temperature< with 50% or less humidity.
An indoor fruit tree nursey would be hard to control. Most homes do not have a high enough humidity level to sustain their growth. You would need to add humidity to a room, and keep the door closed. Most fruit trees do require a cold snap of several hundred hours below 40 degrees to grow properly.
The relative humidity (RH) in a kitchen can be measured by using a humidity gauge. A maximum indoor relative humidity of 55% RH may be acceptable, but a 50% RH better is better.
A research by ASHRAE (American Society of Heating, Refrigeration and Air Conditioning Engineers) shows that the ideal indoor humidity level for health is about 40%-60%.You can use a hygrometer to measure the indoor humidity. You can use a humidifier to adjust the humidity of your room. There are different sizes of humidifiers and they each have a different humidifier rating, as well as square footage usually covered. Cool mist/evaporative humidifiers are generally cheaper than warm mist and ultrasonic ones. Good brands such as Dyson, Keecoon【large-scale capacity】, Panasonic, etc.
The most popular indoor temperature is 72 degrees.
Humans are uncomfortable in cold weather with an indoor humidity much below 32%. Added humidity to indoor air keeps your wood furniture from drying out and squeaking, it stops "shocks" when you touch a doorknob, and it keeps your skin from feeling "chilly", even though the thermometer in the room says 72 degrees. It also helps you sleep better, and prevents gummy "stuck together" eyelids when you wake up in the morning.
If you have de-humidifiers then just take out the plug.
You can always grow them indoor with suitable humidity and distilled water.