Posted by Steve Barker LT on November 10, 2006, 2:49 pm
From what I can tell with the little information available on the web, the
$10-12 a gallon antifreeze sold for radiant heat systems is nothing more
than $4 a gallon RV antifreeze. Any thing to dispute this?
thanks for the input,
--
Steve Barker
Posted by SJC on November 10, 2006, 3:29 pm
> From what I can tell with the little information available on the web, the
> $10-12 a gallon antifreeze sold for radiant heat systems is nothing more
> than $4 a gallon RV antifreeze. Any thing to dispute this?
>
> thanks for the input,
>
> --
> Steve Barker
>
>
I don't know the details, but I would imagine it has to do with anti-corrosion.
The radiant heating solution may have additives to protect copper, brass, joints
and pipes. I would ask the people at the radiant store to justify their higher
prices.
Posted by Ecnerwal on November 10, 2006, 5:55 pm
> From what I can tell with the little information available on the web, the
> $10-12 a gallon antifreeze sold for radiant heat systems is nothing more
> than $4 a gallon RV antifreeze. Any thing to dispute this?
RV antifreeze is premixed at a low concentration - it slushes at quite a
high temperature (above 0F, IIRC) despite its claims to protect against
freezing to -50F (which it may, by means of being a somewhat
low-pressure slush, rather than solidly frozen). I happen to know this
because I tried an environmentally friendlier approach to the
super-duper windshield wash with toxic ethylene glycol in it (how can
they sell that stuff?) I tried using RV antifreeze instead, and got a
reservior full of slush as soon as it got marginally cold.
"Radiant Heat system Antifreeze" is 100% polyproylene glycol
(essentially) and is designed to be mixed with water for use.
So its somewhat similar to people who buy premix car antifreeze at $5,
because the unmixed is $8, but the $8 bottle makes twice as much, so it
actually costs less. Except that I don't know what the concentration of
the RV stuff, is, just that it's not a very effective antifreeze
mixture, so I suspect it's rather low concentration, quite possibly low
enough that the more expensive stuff is also cheaper compared to it at
1/3 the price.
--
Cats, coffee, chocolate...vices to live by
Posted by Steve Barker LT on November 10, 2006, 7:47 pm
Thanks for the reply.
--
Steve Barker
>> From what I can tell with the little information available on the web,
>> the
>> $10-12 a gallon antifreeze sold for radiant heat systems is nothing more
>> than $4 a gallon RV antifreeze. Any thing to dispute this?
> RV antifreeze is premixed at a low concentration - it slushes at quite a
> high temperature (above 0F, IIRC) despite its claims to protect against
> freezing to -50F (which it may, by means of being a somewhat
> low-pressure slush, rather than solidly frozen). I happen to know this
> because I tried an environmentally friendlier approach to the
> super-duper windshield wash with toxic ethylene glycol in it (how can
> they sell that stuff?) I tried using RV antifreeze instead, and got a
> reservior full of slush as soon as it got marginally cold.
> "Radiant Heat system Antifreeze" is 100% polyproylene glycol
> (essentially) and is designed to be mixed with water for use.
> So its somewhat similar to people who buy premix car antifreeze at $5,
> because the unmixed is $8, but the $8 bottle makes twice as much, so it
> actually costs less. Except that I don't know what the concentration of
> the RV stuff, is, just that it's not a very effective antifreeze
> mixture, so I suspect it's rather low concentration, quite possibly low
> enough that the more expensive stuff is also cheaper compared to it at
> 1/3 the price.
> --
> Cats, coffee, chocolate...vices to live by
Posted by daestrom on November 11, 2006, 5:54 pm
>> From what I can tell with the little information available on the web,
>> the
>> $10-12 a gallon antifreeze sold for radiant heat systems is nothing more
>> than $4 a gallon RV antifreeze. Any thing to dispute this?
> RV antifreeze is premixed at a low concentration - it slushes at quite a
> high temperature (above 0F, IIRC) despite its claims to protect against
> freezing to -50F (which it may, by means of being a somewhat
> low-pressure slush, rather than solidly frozen). I happen to know this
> because I tried an environmentally friendlier approach to the
> super-duper windshield wash with toxic ethylene glycol in it (how can
> they sell that stuff?)
Where do you by windshield wash with ethylene glycol in it?? Here in NY the
only windshield washer fluid I've found has methyl alcohol in it. Still
toxic, but breaks down in the envrionment much better (and animals don't
lick it up like ethylene glycol).
Besides, I thought EG was bad for car paint surfaces.
daestrom
XML site map
> $10-12 a gallon antifreeze sold for radiant heat systems is nothing more
> than $4 a gallon RV antifreeze. Any thing to dispute this?
>
> thanks for the input,
>
> --
> Steve Barker
>
>