Results 1 to 12 of 12
  1. #1
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    3,525
    Post Likes

    Thank you, Watts law...

    Was at the made in China store yesterday at checkout. guy behind me pointed to a 12v "windshield defroster" and commented on it.

    He got it for one of his vehicles, but said it didn't work too well.

    I picked it up and no watt output listed on it like most elec htrs have.

    I pointed out to guy that 12vdc and 13A come out to about 150W. "I might as well lay a light bulb on dash then", he says.

    Maybe it works better in a smart car? I joked. You can't run it all night to warm car, would kill battery, so what good is it?
    Col 3:23


    questions asked, answers received, ignorance abated

  2. #2
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    26,084
    Post Likes

  3. #3
    Join Date
    Jan 2001
    Posts
    8,491
    Post Likes
    Get a block heater..... still gotta start the car but it warms up faster.....

    I just scrape my windshield...... turn the truck on and scrape it off real quick......

    Of course.... my fan doesnt work till I drive down the road and get it up to about 50..... with temp dial set to cold..... guess it opens something up to get some wind across the fan..... sometimes I can take my hand and bump the fan housing and get it to work...... but regardless.... I still go ahead and scrape the windows.
    She's a meth cookin mama in love with a pill crunching man....

  4. #4
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,508
    Post Likes
    Quote Originally Posted by billygoat22 View Post
    You can't run it all night to warm car, would kill battery, so what good is it?
    By this logic, no car should have anything that won't work all night long when the engine isn't running. Certainly not a defroster, heater, or air conditioning. What's the point of anything?

    Actually, I think the point of those things is to try to help if your vehicle's hvac fan takes a crap. I had one of those in one of my first vehicles when I was about 16 or so. I have to agree with that guy, in that they really don't work worth a crap. If you ever are in the need for one of those things, I think you'd be better off saving your money and hanging your head out of the window (which I've had to do plenty of times back then).

  5. #5
    Join Date
    Mar 2013
    Location
    Springville, NY
    Posts
    4,516
    Post Likes
    everyone should have an electrically heated windshield. hop in, turn the key, hit a button, and 1/4" solid ice disappears in 3 minutes. easy peasy.
    Experience - knowing when to get the hell out of the way and plug your ears.

  6. #6
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,508
    Post Likes
    Quote Originally Posted by HVAC_Marc View Post
    everyone should have an electrically heated windshield. hop in, turn the key, hit a button, and 1/4" solid ice disappears in 3 minutes. easy peasy.
    Hell, I'd settle for diffusers that were actually aimed at the windshield in a way that made sense. You know when part of your wiper freezes up and then you only have a tiny part of it that actually touches the windshield, and then you need to hang out the window and try to grab onto the wiper while it's moving and smash it against the windshield a few times? This could easily be avoided if the manufacturer would have lined up the diffusers to go underneath the entire length of the wiper blade. I know that in the Ford vans at least, the slots are offset and staggered in a way that leaves part of the wiper blades without air blowing under them. They've been making vehicles for a little over 100 years, but they can't figure out simple stuff like this yet.

  7. #7
    Join Date
    Jan 2011
    Location
    Ottawa, Canada
    Posts
    411
    Post Likes
    I've seen higher end cars with the defrost strips layed on the window under the wiper blades.. That seems like a good idea to me.. Same function as the rear defrost.

  8. #8
    Join Date
    Oct 2014
    Location
    Columbus, Ohio
    Posts
    264
    Post Likes
    Some European car manufacturers are already developing CO2 A/C systems for cars because of F-gas regulations, and one of the cool things about such a system is INSTANT HEAT from the condenser when you start it up. They are using that heat to defrost the windshield in winter, which is an awesome idea.

  9. #9
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    3,525
    Post Likes
    Quote Originally Posted by ammoniadog View Post
    By this logic, no car should have anything that won't work all night long when the engine isn't running. Certainly not a defroster, heater, or air conditioning. What's the point of anything?

    Actually, I think the point of those things is to try to help if your vehicle's hvac fan takes a crap.
    You don't need to run the lights, a/c, defroster or heat all night for it to work in the morning, which would kill the battery. But the output of the battery heater is so small, it would have to be kept on all night to keep some heat in the glass if any hope of clearing off fog in morning, which defeats the purpose if the battery is dead and car won't run/ heater is cold.
    Col 3:23


    questions asked, answers received, ignorance abated

  10. #10
    Join Date
    Dec 2002
    Location
    in a house, Appomattox, Va.
    Posts
    3,525
    Post Likes
    heated mirrors are pretty cool, too.
    Col 3:23


    questions asked, answers received, ignorance abated

  11. #11
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,604
    Post Likes
    The block heater is actually the most effective way to get the vehicle warm quickly.
    Want to REALLY save energy? Tighten up the house/ductwork and downsize the HVAC system. Smaller units keep stable temps, dehumidify better, run quieter in addition to using less power.

  12. #12
    Join Date
    Mar 2013
    Location
    Springville, NY
    Posts
    4,516
    Post Likes
    Quote Originally Posted by 54regcab View Post
    The block heater is actually the most effective way to get the vehicle warm quickly.
    unless you have a catalytic auxiliary heater
    Experience - knowing when to get the hell out of the way and plug your ears.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine