At 27% humidity, a swamp cooler would provide great cooling, for very little money.
>>At 27% humidity, a swamp cooler would provide great cooling, for very little money.
Bump that.
Throw in a whole house fan to circulate the moisture molecules on a path through the house sucking heat as they go... to be expelled out the attic vents.
Thermostatically controlled Fans on the attic vents also help.
Swamp Cooler without circulation = a humid, moldy, hot, mess.
I can second the idea of a swamp cooler, which is very easy to fabricate. You will need:
A door sized piece of thin plywood.
Two cheap screen doors, bolted together with a 1” gap.
Enough excelsior cooler pads to fill the gap.
A trough to catch excess water beneath, which drains somewhere safe, and one with holes to dribble into the pads above.
A small hose rigged to dribble water into the upper trough.
A large, strong square fan.
Bolt the screen doors together with the pads between them. Erect the door on the cooler, darker side of the building in the doorway.
Cut a hole in the bottom of the cheap plywood large enough for the square fan, and have it pointing out the door on the other side.
The fan will create an underpressure in the building, which will draw air through the wet cooling pads, cooling the dry air considerably.
When the temperature drops outside, continue to use the fan to pull cool air into the building in the morning.
I have several crazy neighbors here in southern California who OPEN their windows so it is 110 degrees inside as outside!
We do not have to pay electric at the apartment building so I have the a/c on 24/7 and do not understand why they do this.
I asked one and she replied she does not like the noise from the a/c and it is too cold.
I have it set at right now 66 degrees and the rooms are 78 degrees according to the thermometers I have. The windows are cheap and I do not think the walls are are insulated. The attic does have some insulation.