Maybe, but I think you need 30,000 btu/ hour at least to heat water for
a shower intantaneously. Don't think you're goin to get that much from
heat exchanger on exhaust.
Al Brase

tmiller wrote:

> Maybe you can hang a heat exchanger at the exhaust outlet and let the
> engine idle while you shower?  Run a hose from the faucet to the heat
> exchanger for an on board water supply.
>
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