Re: [CAD_CAM_EDM_DRO] Subject: Re: OT: Intro + Q:Selecting workshop heater

Well over in this side of the world. But in Europe the flame is watched
by a second thermostat that shuts of the gas as soon the flame died.
Works pretty slick.
Sven Peter

Kenneth Mayer wrote:

> > Date: Tue, 19 Dec 2000 09:52:14 -0800
> > From: "Marcus & Eva" <implmex@...>
> >
> >Hi Marco:
> > Go with electric.
> >Insulate the garage really well, and a little oil filled radiator type
> >heater will keep it warm and dry.
> >I always worry about unattended flames in a shop with paint thinner,
> varsol,
> >acetone etc around.
> >I also worry about carbon monoxide.
>
> Electric heaters are an ignition source for ignitable vapors. The
> thermostat contacts spark or arc when the open/close.
>
> Don't leave the oil filled electric heaters unattended. They do not have
> any secondary safety device. The only on/off device is the thermostat. The
> contacts can weld closed, causing runaway operation. The oil overheats and
> pressure builds until a spot weld fails. The spot welds rip open, allowing
> a mist of hot oil to escape. The oil can be above its autoignition
> temperature, or will otherwise find an ignition source. The result is a
> very fast growing fire.
>
> Ken
> :-)
>
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