🚀 go-pugleaf

In article <2modm1$mpd@engnews2.Eng.Sun.COM> bender@oobleck.eng.sun.com writes:
>Does anyone know where I can rent/buy a device that will let me "see" the
>heat that is escaping from my house?  I'm trying to figure out where I'm
>getting heat loss, and some sort of a device similar to IR night vision
>goggles seems like it would be the right thing to use.

You have the right idea, in general, but some caution is indicated.  "IR"
covers a very wide range of the spectrum, much wider than visible, and a
multitude of sins.

In particular, most infrared night-vision devices see *short-wavelength*
IR, just below the visible.  You won't get any indications of temperature
out of them; thermal IR is *long-wavelength* IR.  Imaging in thermal IR
is much harder and the devices that do it tend to incorporate fun things
like liquid-nitrogen cooling.  You definitely want to rent or borrow, not
buy.  If your local electrical utility has any sort of conservation
program, ask there first.
-- 
Critics have long said "NASA specializes| Henry Spencer @ U of Toronto Zoology
in pork"; now that's White House policy.|  henry@zoo.toronto.edu  utzoo!henry