A swamp cooler is an evaporative cooler with a fan. Way different from a roof turbine. 

Jim

Sent from my iPad

> On Jan 2, 2016, at 3:42 PM, Edward Maglott <emaglott3@GMAIL.COM> wrote:
> 
> that sounds a lot less impressive.  it does mention furnace blowers as one
> of it's main applications.
> Edward
> 
>> On Sat, Jan 2, 2016 at 3:32 PM, Karl Wolz <wolzphoto@q.com> wrote:
>> 
>> I believe they're referring to the turbines mounted on home roofs. Low
>> speed and low resistance with no motor.
>> 
>> Karl Wolz
>> Sent from my electronic umbilicus
>> 
>>> On Jan 2, 2016, at 11:56 AM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
>>> 
>>> I don't lay any particular importance to
>>> the "turbine" designation.  I
>>