the humidity is not 'picked up' humidity from the condenser, it is raised because of leaks in the a.c. Ducts. There are always leaks, often in excess of 10%.

I think you may mean that the supply fan in the garage is picking up moisture from the evaporator coil in the air handling unit, also located in the garage. The condenser coil is located outside of the house. In the cooling season, the condenser coil does not get wet, and even if it did, the condenser fan would not carry any moisture into the house. It just blows air outside.

This sounds very strange to me. Even if you are controlling the humidity at the thermostat, that doesn't mean that the humidity is consistent throughout the rest of the house. I would think that 92 degrees could cause damp areas that could damage furniture or other things in the house or cause mold. Especially if you have windows that leak humid air into the house. I would suggest checking the humidity near the windows and doors.

Humidity distribution is quite fast within a room. Area's with poor airflow are a different story (Behind dressers, etc.)

http://www.ibpsa.org/proceedings/BS2007/p572_final.pdf

I sure like all those equations. But, my concern is that, if the house temperature is 92 degrees, the air conditioning is probably almost never running. So, unless the fan is blowing air through the house, the dry air will not get distributed at all. And, yes the air in stagnant areas could become very humid. I would never want my house to have a constant air temperature of 92 degrees, regardless of the humidity level. You may get away with 80 or 82 degrees.

It's fine. The two homes I mentioned have been doing this for the last 5 yrs, as directed by Munn's, without any issues whatsoever.
Steve

Does your neighbor have a special vacation setting whereby the system ignores the temperature setpoint and only turns on when the relative humidity setpoint is exceeded? If so, this sounds a bit strange. I would expect (want) the system to run when either the temperature setpoint or the relative humidity setpoint is exceeded. Setting the temperature setpoint in the low 80s and the relative humidity setpoint around 50-60% would be reasonable.

Why? Relative humidity is exponentially related to temperature and is also limited on how high it can go with hot temperatures. If the temperature in the house gets hot enough, you may never exceed the relative humidity set point. For example, if the temperature in the house was to reach 95F then the relative humidity will probably never exceed 60%. In this situation, the system will never come on but there could be a fairly high absolute moisture level (the dew point) in the house.

Good Post.

His Vacation Setting is Set it to Cool 75 Degrees on the Thermostat and on the Humidistat there is a dash mark - that the knob is turned to and it is at the mark between 50 & 70 but just a - it does not have a number. I would describe it as 60. (Just Being Accurate) Clear step by step directions are on an Index Card that is from the Original Owner from 32 years ago. It is a Manufactured Home in Perfect, Showroom, Day One Condition. The Serial Number on the Home is #2 :1rotfl: I did put new batteries in his Thermostat Today. Fresh Red Duracell's. I'm mainly there to watch for Skylite Leaks and animal invasions. So far so good.

I tell you in the last week or so my annual membership fee to belong to TOTV'S has paid off. The help I've gotten is priceless. Thank's a lot! :bigbow: To you all.

Probably zero insulation in that old dog.......the home, not the owner.

HUD code '76. It's insulated, common misconception.
https://www.hud.gov/sites/documents/MHCCFRPARTIV.PDF

Steve