rick wrote:
On 28/05/2017 21:55, Tim+ wrote:
Tim+ wrote:
Harry Bloomfield Wrote in message:
Tim+ was thinking very hard :
Definitely. With the appropriate regulator, heat output doesn't vary much
but butane, per cylinder, per therm, is considerably cheaper.

Cheaper, but not considerably so.

Yes, considerably so. Cylinders of butane are generally 20%
heavier (for the same cost) than their propane equivalents. Fuel
is more calorific.

Extra weight + extra calories = considerable cost saving.

Tim


Oops. Okay, not 20% and not the same price but the balance is still in
favour of butane (cost-wise).

Tim

Strange that manufacturers are now supplying Propane regs as standard
and recommending propane as the most efficient - although admittedly
they do say will also work on butane.

Both Outbackand Fire Mountain (2 big names) give that advice.




Probably because they don't want complaints from customers of the heat
output dropping during use in colder weather. Easier to just say "use
propane" and then they don't get any aggro from folk who don't understand
physics.

Tim

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Please don't feed the trolls