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Hi Jiles, Your not going to like the results of using the blower fan as humans feel the skin effect. Skin effect is where air moves across the skin thus evaporating moisture from the skin surface thus cooling the surface of the skin making a person feel cold. You need to heat the air and slow down the air speed to stop this effect. You can use your existing controls to try this. Set your thermostat low so your furnace won't come on then turn the thermostst fan switch to on. This will run the blower but not the heating side of the furnace. If by chance your thermostat doesn't have fan control, build a fire outside on the ground then use a cheap box fan accross the fire to blow at you. You'll notice while you have a roaring fire the warm air feels good but as soon as the fires dies down then the air feels cold. If you would measure the heat coming off the fire at that time, it would still be several hundred degrees. When measured with full roaring fire then you would see a couple thousand degrees. This would be the same effect you would be getting with the gas logs and a fan, just on a larger scale. Moving the air considerable slower, like a ceiling fan runs to where the air blows to the ceiling on the lowest cfm setting, will help keep this effect not as noticeable. You could also see the results with a cheap $20 box fan ran on the lowest speed. Both would obtain better results than a blower motor. There's no replacement for BTU's. If a building requires 100,000BTU/hr to keep comfortable then it doesn't matter where that 100000BTU/hr comes from, either your furnace or your gas logs, but it still requires a 100000BTU/hr to keep warm. To answer your question, if your furnace has a 2spd motor then it should have the controls there for 2spd operation. High speed for AC use and low speed for heating. T_Bone
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