Space heater

plow hand · Jan 4, 2016

I have a control tower that is 7'x7'x7' it is insulated but there is a lot of glass.I have 2 milk house heaters in there but I'm having trouble keeping the glass cleared..It is 70+ degrees in there..do I need to go to 220 heater with a powerful fan and heat?

rustyfarmall · Jan 4, 2016

Maybe a small fan or two, directed at the glass. Just to keep the air moving.

plow hand · Jan 4, 2016

I've tried a fan too..helps but still
foggy in some areas.. 80 sq.ft.of
glass.

Mike M · Jan 4, 2016

I'm guessing you have single pane windows ?

I'd upgrade to double or triple panes.

Sam Womer (PA) · Jan 4, 2016

Try a dehumidifier. That may dry the air enough to lessen of eliminate the problem.HTH Sam.

DMP62 · Jan 4, 2016

The glass will fog up (condensate)as long as the inside glass surface is colder than the dew point inside, as someone else suggested single pane uninsulated glass will be very hard to keep warm enough on the inside surface to keep it clear. Beyond what has already been suggested a dehumidifier may help get rid of the moisture that is condensating on the glass and keep it clear.

MarkB_MI · Jan 5, 2016

You first need to purge the humid air out of the room. Without sufficient ventilation, it will be impossible to keep single-pane glass clear. If you put a cheap humidity meter in your control room, I'll bet it will register around 70 percent humidity, and you need to get it down below 30 percent.

I'd start by adding an exhaust fan and an inlet for cold air. Even if the humidity outside is high, the relative humidity of the incoming air will drop significantly when it warms up. Of course, the room will be a lot colder, but you can always add a bigger heater. As a side benefit, you'll be more comfortable in the drier air.

Geo-TH,In · Jan 5, 2016

plow hand,
A single layer of glass has an R rating of one. When the glass temp is below dew point, you will have condensation, just like the condensation people battle with uninsulated metal roofs.

Solution, better windows or lower humidity. You can lower humidity with a dehumidifier or trying exhausting some humid air and bring in cold outside air. Try a fan too.

Those who don't believe that 37 degree air at 100% humidity when warmed up to 86 degrees will become 20%. So bring in outside air and dry out the room.

BTW, if your heater is 1500w, that's equivalent to a 6 ft baseboard heater. Two heaters = 12 ft.
George
dept of physics Georgia university.

ss55 · Jan 5, 2016

Where is the excess moisture coming from? You might need more ventilation to get rid of the moisture.

When the vacuum seals break down on double pane windows, moisture gets trapped between the panes and they fog between the panes.

Space heater

plow hand

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rustyfarmall

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plow hand

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Mike M

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Sam Womer (PA)

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DMP62

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MarkB_MI

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Geo-TH,In

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ss55

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