Rapid Heat Question - Page 2 - Ford Powerstroke Diesel Forum
General 6.7 Discussion (2011-2016) General 6.7 Discussion

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post #11 of 19 Old 01-08-2017, 05:43 AM
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the truck doesn't warm up faster the cab does.... not a lot but it does
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post #12 of 19 Old 01-08-2017, 06:23 AM
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Originally Posted by Ranzan View Post
the truck doesn't warm up faster the cab does.... not a lot but it does
I'm thinking that not much in Regina warms up a lot in the winter. Lol.

I've seen the confusion about Rapid Heat before. For those unclear... the Rapid Heat option installs electric heating elements - think hair dryer - in the heater ducts. When the truck is started - and before the coolant flowing through the heater core is hot - the electric heating elements heat the air blowing into the cab. So... think expensive hair dryer.

My personal tendency is to rely on a block heater to warm things up quickly. A diesel-powered coolant heater would be the best, in my view. Those two options at least reduce wear on the engine. Rapid Heat probably goes the other way.
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post #13 of 19 Old 01-08-2017, 06:57 AM
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LMAO.... -35 with wind chills in the -40s.. but our igloos keep us warm
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post #14 of 19 Old 01-08-2017, 06:59 AM
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LMAO.... -35 with wind chills in the -40s.. but our igloos keep us warm
Holy crap! I don't even want those temps on the same planet with me! Be safe!

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post #15 of 19 Old 01-08-2017, 07:53 AM
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Holy crap! I don't even want those temps on the same planet with me! Be safe!


We've got the same problem in WI, brutal, but the big rig keeps rolling!


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post #16 of 19 Old 01-08-2017, 08:31 AM
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I had the same question when purchasing my truck. Record lows in Atlanta last night. Here is what I captured warming the truck up this morning.

1 Minute run time. 50.5 F Outside temp 19F

3-5 Minute 80F

Forum wont let me add pictures with post until I have more posts. Feel free to see my album with the results.

Well worth it in my opinion!
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post #17 of 19 Old 01-08-2017, 01:14 PM
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We've got the same problem in WI, brutal, but the big rig keeps rolling!


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Same thing here, truck still starts right up. I don't see the big help that the supplemental cab heater does any difference. I let the truck run for at least 20 minutes before I get in and drive.

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post #18 of 19 Old 01-09-2017, 12:29 PM
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I did some testing of the supplemental heater when my truck was new. The full set of data is available via the link in my sig including some comparisons with and without using the block heater. In the snip below you can definitely see that the supplemental heater is doing a good job. Ambient temps were 5 degrees F and after just one minute I was getting 54 degree air through the vents.

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With spreadsheet open click File then Download if you would like a copy of the spreadsheet.


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post #19 of 19 Old 01-09-2017, 03:13 PM
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I have never timed my truck warming up, but this morning, it was -21F when I cranked up. Truck was plugged in all night, block and oil heaters. I let it run for 15 min, got in and in about 5 min I had warm air blowing. The block heater gets the coolant up to about 40-50 before I crank it, and the oil hits maybe 30-40.


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