I'm planning on rewiring and probably custom gauges to my Valiant this winter, thinking about deleting the factory heater never plan on driving in the winter but still could use a windshield defrost and maybe some heat for chilly night drives. Thinking is there some small 12v non gimmicky electric defrost/heaters probably around 500w ? Don't care if it's Diy build. Anyone done anything like that ?
Electric defrost/heater ?
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Hopefully not
it's just an idea right now.
Looking at something like this (below) but hard to tell from the reviews cause their basing it on as a heater, I'm mainly looking for defrost (condensation) if it pumps out a little heat in a chilly night bonus.
A 500w heater or amplifier should be the same thing to the electrical system ?
It will only be used now and then.
Personally, you may be hard pressed to find a system that can beat the factory hot water defrost/heat. 2 cents
Not looking to heat the car just get rid of condensation when needed.
A factory heater seems to be 8,000w to heat the whole car up in a winter, shouldn't take all that much just to clear a little fog off the window once and a while.
A factory heater seems to be 8,000w to heat the whole car up in a winter, shouldn't take all that much just to clear a little fog off the window once and a while.
67Dart273
Well-Known Member
What you have been told is right on. Resistive heat is very simple. Volts X amps is wattage. This will be like running the starter for as long as you are running the defroster. It will be hard on batteries and alternators. OEM window electric defrosters also draw a fair amount of juice, but they are as efficient as possible---right in the glass. What you are proposing is VERY inefficient, and I have no idea what heat loss you will have.
"In the old days" there were known as Studebaker defrosters. These were a small squirrel cage fan with a small heat exchanger ( core) on the side. This allowed it to warm up a little faster than the main heater.
There also exists LPG and gasoline heaters and defrosters, mostly used in aircraft. "South Wind" ( a division of Stewart Warner) was popular in 40 Fords. My Grampa had one, the engine needed to be running to supply vacuum which acted as the chimney/ vent. --draft. They were gasoline power, ignited by what amounts to a glow plug.
"In the old days" there were known as Studebaker defrosters. These were a small squirrel cage fan with a small heat exchanger ( core) on the side. This allowed it to warm up a little faster than the main heater.
There also exists LPG and gasoline heaters and defrosters, mostly used in aircraft. "South Wind" ( a division of Stewart Warner) was popular in 40 Fords. My Grampa had one, the engine needed to be running to supply vacuum which acted as the chimney/ vent. --draft. They were gasoline power, ignited by what amounts to a glow plug.
I’m gonna have a 1,000 w stereo 200-500 w more for a defrost ain’t gonna be that big of deal, at worst got to turn my stereo down while defrosting
Yes I understand I’m gonna have to upgrade the alternator.
Yes I understand I’m gonna have to upgrade the alternator.
I'm rewiring whole car, old harness is being yanked out.
Yes it was, I like to find a more square/cubed version and install two, one under each dash vent with a small fan on each
Couple of these might even do the job.
https://www.amazon.com/Constant-Temperature-Heating-Element-Conditioner/dp/B0BJ9ZFMSC/?tag=fabo03-20
Tom
https://www.amazon.com/Constant-Temperature-Heating-Element-Conditioner/dp/B0BJ9ZFMSC/?tag=fabo03-20
Tom
Think can mount it where the old dash speaker was and have it blow that and the two vents.
I just ordered the 100W with the attached blower to play with.
Tom
Tom
Canceled the Amazon order and got the same thing for $11.76 on eBay.
100W 12V Energy Saving PTC Heater Portable Constant Temperature Heating For BBT | eBay
Tom
100W 12V Energy Saving PTC Heater Portable Constant Temperature Heating For BBT | eBay
Tom
I was reading the comments and one guy was using them for a race car defrost and said it worked fine. Let me know how it works out.
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