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Old 10-21-2007
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Propane vs. CNG

Unlike CNG, which is used in boating and RVs throughout Europe, propane is heavier than air. Slow leaks collects in bilges and explode rather than escaping into the atmosphere.
So, why is propane the dominant stove fuel on the USA?
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Old 10-21-2007
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Seems to be a North American thing... CNG availability in the US and Canada is nothing like that of propane.

The cost and weight of the CNG cylinders (and the idea of packing something at 2000 psig) may be factors... though here in Vancouver there is a relatively inexpensive exchange program available for CNG users.

You're right, it makes way more sense to use CNG over propane for the reasons you stated. IIRC, CNG has a slightly lower BTU content as well, but it's better than alchohol.

The relative rarity of propane based explosions on boats makes one think we can handle it.
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Old 10-21-2007
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It cost me $14 to exchange my empty CNG tank for a full one less than 5 minutes from the house. I infer this may be a stoke of luck being so close but given the proximity to a nearby source, I'd never switch. If I were venturing offshore, however, it would be a problem.
Obviously, it depends on frequency of use but one full CNG tanks lasts us approx 3-4 years
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