How dry is dry enough?

If you have a gas furnace, as your furnace runs, it is obviously burning moisture. If you have a 90% furnace, opposed to an older 80%, you may really notice dry conditions inside the home. Adding a humidifier to the home or to the furnace will help. The more that furnace runs in cold conditions, the more moisture it will remove inside the thermal envelope. What is the humidity level outside?
 
My backyard this morning-
 

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If you have a gas furnace, as your furnace runs, it is obviously burning moisture. If you have a 90% furnace, opposed to an older 80%, you may really notice dry conditions inside the home. Adding a humidifier to the home or to the furnace will help. The more that furnace runs in cold conditions, the more moisture it will remove inside the thermal envelope. What is the humidity level outside?
Water vapor is a byproduct of burning natural gas (along with CO2)...both of which are the building blocks of life on earth (as taught in organic chemistry...a science which all the climate dipsticks ignore)
 
Which is why when you run a natural gas or LP furnace, it dries out the desired conditioned space, AKA thermal envelope. 80% furnaces burn 80% of a cubic foot of gas, and 90% furnaces burn 90% of a cubic foot of gas. That's why if you look at a drain on a 90% furnace, they can drain several gallons a day. That is the moisture that started in the home.
 
That will never happen in Alabama!
Agree. I have never seen humidity that low in a home in AZ, I am a third generation HVAC contractor. Have been in a lot of homes. Not saying in theory it can't happen, but man that would have to be one tight house. Perhaps the instrument is off
 
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No.............well, maybe a little...
A few shocks. I have a good grounding system in my workshop reloading bench. But I don't want to tempt providence. My dog sticks his nose on most things in the house and gets a nasty surprise when he grounds out. He's 14 now, you'd think he would have learned by now.🤭
 

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