In a message dated 1/9/99 3:28:20 AM Pacific Daylight Time, bogle@bway.net
writes:

<< Michael Avrea wrote:
 >
 > Hi Nathaniel,
 >         I bought a system from R & M Specialty Products that taps into a
heater line
 > and heats the water as it passes thru an exchanger....

 Michael,

 That is a great system.

 Does the coolant need to be circulating ( engine running)?  Seems like
 it would, otherwise the exchanger would cool off. >>

Nathaniel,
        That's correct, so it depends how cold it is as to how long you need to have
the engine running to warm up the coolant. Of course you need to turn on the
heater to make the coolant run thru the lines. I live in a fairly warm climate
so the warm-up time is only a few minutes.