Condensation Problem on front window.
I pulled the curtain back covering the front windshield this morning only to find 1/4 of water along the bottom and condensation build up about 6 inches up the window. I had just finished installing R...
Forum Discussion
Hi,
Basically I just used a bath towel to dry out the windshield when it got wet. Or a smaller dish towel, that I can hang on the oven door to help dry it out.
Or you can place one of your heaters near the windshield, and it will blow warm and very dry air across the windshield, keep the window warm, and prevent the condensation from happening there.
I would not bother with a dehumidifier, they are kind of expensive, while opening a roof vent while cooking is required, just leave it open about 1/4" all the time, you will bring in some dry outside air, and constantly let out some moist inside air through the roof top vent.
Air has a 'relative humidity' so the number of 'grains' of water that air can hold varies with temperature. So outside air with 85% humidity and 43F can only hold about 15 grains per cubic foot of air, while the 70F air that is leaving with 65% RH can hold about 200 grains of moisture per cubic foot. So you are bringing in much dryer outside air.
A dehumidifier has a electric compressor that cools the incoming air to about 40F on the first coil, then heats the air going through the condenser to about 85F, so that the air drops to about 15 grains of water (leaving it on the cold coil, just like in a HVAC system) then heats it back up to 85F where it can absorb much more moisture, and is very dry now. You just skip the electric compressor part by bringing in outside 40F air and exhaust the 70F moist air.
When I lived in Portland OR in my motorhome for one winter, I used a 25' long #12 gauge extension cord to plug in one of my electric heaters. I ran the cord into the basement, and through a fitting in my bedroom that the factory installed. Then I plugged in one heater there, running it on high heat. It draws about 12.5 amps. With the 30 amp RV service, I ran two other heaters on low heat output, and that kept it toasty warm inside.
At night, I would shut off the two other heaters, and just warm the bedroom. In the morning, I could run one heater on high - normally in the bathroom, while warming up the front of the coach. I did not use a coffee maker, or toaster oven. When running the microwave, I would shut off the heaters. I never tripped my 30 amp main breaker.
Good luck!
Fred.
Basically I just used a bath towel to dry out the windshield when it got wet. Or a smaller dish towel, that I can hang on the oven door to help dry it out.
Or you can place one of your heaters near the windshield, and it will blow warm and very dry air across the windshield, keep the window warm, and prevent the condensation from happening there.
I would not bother with a dehumidifier, they are kind of expensive, while opening a roof vent while cooking is required, just leave it open about 1/4" all the time, you will bring in some dry outside air, and constantly let out some moist inside air through the roof top vent.
Air has a 'relative humidity' so the number of 'grains' of water that air can hold varies with temperature. So outside air with 85% humidity and 43F can only hold about 15 grains per cubic foot of air, while the 70F air that is leaving with 65% RH can hold about 200 grains of moisture per cubic foot. So you are bringing in much dryer outside air.
A dehumidifier has a electric compressor that cools the incoming air to about 40F on the first coil, then heats the air going through the condenser to about 85F, so that the air drops to about 15 grains of water (leaving it on the cold coil, just like in a HVAC system) then heats it back up to 85F where it can absorb much more moisture, and is very dry now. You just skip the electric compressor part by bringing in outside 40F air and exhaust the 70F moist air.
When I lived in Portland OR in my motorhome for one winter, I used a 25' long #12 gauge extension cord to plug in one of my electric heaters. I ran the cord into the basement, and through a fitting in my bedroom that the factory installed. Then I plugged in one heater there, running it on high heat. It draws about 12.5 amps. With the 30 amp RV service, I ran two other heaters on low heat output, and that kept it toasty warm inside.
At night, I would shut off the two other heaters, and just warm the bedroom. In the morning, I could run one heater on high - normally in the bathroom, while warming up the front of the coach. I did not use a coffee maker, or toaster oven. When running the microwave, I would shut off the heaters. I never tripped my 30 amp main breaker.
Good luck!
Fred.
