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#1
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Whole House fan
I have a 1700 sq. foot house without A/C, I installed (2)whirly-bird
ventilators last year, I counted 12 -- 4 X16 soffit vents. My house has many ceiling fans but it does warm up in the afternoon if the outside temp. reaches 80F and above, my attic temp. reaches about 110-120F on those warm/hot days. Would a power attic fan (roof mounted) be better or a whole house fan work with my current vents?? Home is in Southern California, warm 80F-90F days and 65-75F nights.... Thanks. |
#2
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Whole House fan
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#3
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Whole House fan
wrote in message ups.com... I have a 1700 sq. foot house without A/C, I installed (2)whirly-bird ventilators last year, I counted 12 -- 4 X16 soffit vents. My house has many ceiling fans but it does warm up in the afternoon if the outside temp. reaches 80F and above, my attic temp. reaches about 110-120F on those warm/hot days. Would a power attic fan (roof mounted) be better or a whole house fan work with my current vents?? Home is in Southern California, warm 80F-90F days and 65-75F nights.... Thanks. I vote for a whole house fan. It will keep the temperature down in your attic and house. |
#4
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Whole House fan
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#5
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Whole House fan
wrote in message ups.com... I have a 1700 sq. foot house without A/C, I installed (2)whirly-bird ventilators last year, I counted 12 -- 4 X16 soffit vents. My house has many ceiling fans but it does warm up in the afternoon if the outside temp. reaches 80F and above, my attic temp. reaches about 110-120F on those warm/hot days. Would a power attic fan (roof mounted) be better or a whole house fan work with my current vents?? Home is in Southern California, warm 80F-90F days and 65-75F nights.... Thanks. Ideal is both. If you have no AC, go with the whole house fan. The advantage is that it will draw in cooler air from outside and push the hot air out of the attic. The disadvantage is that on a very hot day, it will draw in the hot outside air and replace what may be cooler inside. That is when the power vent in the attic is best. If you do add AC, you don't want to use a while house fan at the same time. |
#6
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Whole House fan
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#7
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Whole House fan
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#8
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Whole House fan
Edwin Pawlowski wrote: Ideal is both. If you have no AC, go with the whole house fan. The advantage is that it will draw in cooler air from outside and push the hot air out of the attic. The disadvantage is that on a very hot day, it will draw in the hot outside air and replace what may be cooler inside. That is when the power vent in the attic is best. If you do add AC, you don't want to use a while house fan at the same time. Ditto that, but using the fan for double-duty. In my case, during the day the power vent fan in the attic switches on around 100 deg. F, with the attic sealed off from below. When temps drop outside in the evening, I open some windows at the (N) side of the house, farthest from the door to the attic, and open that door, then drop the setting on the fan t-stat. Soon, I'll just put in a manual switch in parallel with the t-stat, or a timer. J |
#9
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Whole House fan
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#11
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Whole House fan
060621 1320 - posted:
wrote: Edwin Pawlowski wrote: Ideal is both. If you have no AC, go with the whole house fan. The advantage is that it will draw in cooler air from outside and push the hot air out of the attic. The disadvantage is that on a very hot day, it will draw in the hot outside air and replace what may be cooler inside. That is when the power vent in the attic is best. If you do add AC, you don't want to use a while house fan at the same time. Ditto that, but using the fan for double-duty. In my case, during the day the power vent fan in the attic switches on around 100 deg. F, with the attic sealed off from below. Starting a power vent fan in the attic when it's only 100 degrees is a waste. Attic insulation should be more than adequate to handle a 25 degree temp delta. What yo need the attic fan for is to keep it from getting to 140. I have mine set to go on at about 110 So, if you have a fire in the attic, the fan will come on and make things worse... |
#12
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Whole House fan
indago wrote:
060621 1320 - posted: wrote: Edwin Pawlowski wrote: Ideal is both. If you have no AC, go with the whole house fan. The advantage is that it will draw in cooler air from outside and push the hot air out of the attic. The disadvantage is that on a very hot day, it will draw in the hot outside air and replace what may be cooler inside. That is when the power vent in the attic is best. If you do add AC, you don't want to use a while house fan at the same time. Ditto that, but using the fan for double-duty. In my case, during the day the power vent fan in the attic switches on around 100 deg. F, with the attic sealed off from below. Starting a power vent fan in the attic when it's only 100 degrees is a waste. Attic insulation should be more than adequate to handle a 25 degree temp delta. What yo need the attic fan for is to keep it from getting to 140. I have mine set to go on at about 110 So, if you have a fire in the attic, the fan will come on and make things worse... I think everybody should have a smoke alarm in their attic. By your reasoning, nobody should have any HVAC system, because if a fire starts, the air it circulates can "make things worse." -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
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