On 13 Jan 2006 15:49:07 -0800, "Sheldon" > wrote:

>
>Chuck wrote:
>> On 13 Jan 2006 09:10:09 -0800, "Sheldon" > wrote:
>>
>> >
>> >Chuck wrote:
>> >> Going to have to install range hood with outside exhaust (through the
>> >> roof) this weekend...
>> >
>> >Why through the roof, why would you want to cut a big hole in your nice
>> >brand new roof? If possible you're always better off with a
>> >residential exhaust exiting through a side wall with the ductwork
>> >aiming downward. My exhaust duct goes up through a kitchen cabinet and
>> >into the attic where it travels horizontally about eight feet and exits
>> >downward through the soffit... this arrangement also makes it easy for
>> >me to maintain the system myself, I can easily remove all the ductwok
>> >from inside the attic and take it outside to clean if necessary.
>> >Ductwork exiting a peaked roof tends to suffer from down droughts as
>> >even a slight breeze is amplified by the venturi effect as it travels
>> >over a pitched roof. For such a system to work properly you'd need a
>> >vent pipe that extends at least three feet higher than the roof ridge,
>> >very ugly. Those flush mount mushroom looking thingies don't work very
>> >well on many counts, the exiting exhaust grease will stain the roof
>> >too, badly... within a year you'll have a big ugli stain on your nice
>> >new roof, and everytime it rains that stain will expand and also run
>> >down to the eves... this won't look pretty. You don't want to place
>> >any extra holes in a roof, just another place for a leak to develop.
>>
>> I've not seen the soffit fixture... Did you use a "wall" fixture there
>> or do they make one just for exiting soffit?... I prefer this
>> option...
>
>It was there when I moved in. The hood is a Sears Kenmore, works very
>well, has a dual level lamp and the fan is on an infinite rheostat... I
>typically use it within the lowest range. There are aluminum mesh
>filters that I send through the dishwasher as needed. I've no idea who
>did the duct work or who makes the soffit unit... it's quite possible
>the previous owner did that part himself as he owned (still does) a
>large machine shop.

Thanks..
Chuck (in SC)