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HVAC Ductulator 1 Posted by: DrZarkloff
Video duration: 424 seconds Global video hits: 20297 I show how to use a ductulator. Related: drz, ductulator Display Video Comments | Hide Video Comments | Add Comment |
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HVAC Design Design Build P 3.wmv Posted by: tstatech
Video duration: 593 seconds Global video hits: 2626 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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A #1 Air How we size duct work and find leaks Posted by: anumber1air
Video duration: 111 seconds Global video hits: 4179 Related: a, 1, air, how, we, size, duct, work, and, find, leaks Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video: |
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HVAC Design Build P4 Duct Calculations.wmv Posted by: tstatech
Video duration: 781 seconds Global video hits: 7689 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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HVAC Design Build Pt 9 fab 8x16 broadway assembly.wmv Posted by: tstatech
Video duration: 460 seconds Global video hits: 1465 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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HVAC Design Build Pt 5 duct calculations.wmv Posted by: tstatech
Video duration: 430 seconds Global video hits: 3416 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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Design Build P1.wmv Posted by: tstatech
Video duration: 515 seconds Global video hits: 1134 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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HVAC Design Build Process Pt 8 Fab 8x16 broadway Machining.wmv Posted by: tstatech
Video duration: 605 seconds Global video hits: 27449 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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Design Build P2 Posted by: tstatech
Video duration: 660 seconds Global video hits: 1827 Related: N/A Display Video Comments | Hide Video Comments | Add Comment Latest comments made on this video:
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Latest comments made on this video:
By: lovelorn8888. on 26 Jan 12, 03:15:35
@DrZarkloff yeah I can LOL But some of the math is harsh... more like the Formulas Like I hate trying to figure out how many BTU's it take to say cool meat thats 70 down to like say 5 or whatever ? Thats what always gets me
By: DrZarkloff. on 26 Jan 12, 00:46:19
@lovelorn8888 If you can do basic adding, subtracting, multiplication, division and fractions, you'll be? just fine.
By: lovelorn8888. on 18 Jan 12, 18:37:22
hey I have a question lets say im not so good at math,, is the going to hurt me really bad in HVAC?? im going to school right? now for it.... oh and why am I the only young guy in my classes? LOL
By: rsurfer9. on 23 Sep 11, 23:39:15
You had me confused because you said .25 friction rate and went with .05 friction rate to 800? cfm, and mine wasnt matching up.
By: jjpjjpjjp1. on 17 Aug 11, 04:28:07
If a furnace is rated at .03 ESP, where on the chart do you line up the chart?? AND... how come there is 2 scales for friction loss on the? ductulator????? This stuff always concerns me. Is it .05 on the lower scale or is it .1 on the lower scale for friction loss???
By: paunocuh. on 07 Jul 11, 15:17:13
Anyone have ductulator in Java? for mobile?
By: waters65. on 19 Aug 10, 23:56:42
ductulater ; in a sentence . would you like to duct? now or i could just duct u later
By: DrZarkloff. on 15 Aug 10, 17:35:24
@orbtaybal Thanks for the info. I'll check to? see if any of these programs are downloadable through my htc Droid.
By: orbtaybal. on 15 Aug 10, 14:28:05
If you have an iPhone you can get a series of programs.. HVAC Buddy (superheat/subcooling calc) . PT Buddy (has like 700? refrigerants) HVACDuct (ductalator) I'm new school, card board calculator!? no way! :-D BTW, I work on computer room air conditions so you can see how I'm a techie.
By: ComfortAirCompany. on 10 Aug 10, 03:11:27
@DrZarkloff Well I trust your knowledge over my own, but I've never seen matched units put out over 400cfm per ton. But I guess that why I hate rules of? thumb; they always change depending on who I ask. Thanks for the insight, keep the videos coming.
By: co2x3. on 10 Aug 10, 02:51:52
Excellent info Doc Z this clip is why i choose a ductless system yes a 2 ton r410a inverter condensor. whos got time to run ducts in your home when you could go ductless.? very good info though keep em coming
By: mithrander013. on 10 Aug 10, 01:32:19
Very good I like it what are? you going to do next? You said it the sad thing is that most of them have not learned the basics when it comes to air flow.
By: DrZarkloff. on 09 Aug 10, 23:04:10
@ComfortAirCompany Thanks. It's more like 400? to 450 cfms per ton.
By: DrZarkloff. on 09 Aug 10, 22:55:38
@V8Jagnut Thanks.?
By: V8Jagnut. on 09 Aug 10, 13:55:14
cool. interesting.?
By: tstatech. on 09 Aug 10, 03:31:30
@tstatech YouTube doesn't work correctly. I was trying to reply to swapfoxgt above this comment labeled as if I was replying to DrZ. I see all sorts of ways I would change YouTube not to just work better but to work correctly. Sorry guys didn't want to go off on a side tangent but come on. Also want to apologize to DrZ for causing him any grief with my original or subsequent comments. DrZ you are on cool tech. I have learned a thing or 2 from your videos. Great? videos. keep it up.
By: tstatech. on 09 Aug 10, 03:18:34
@DrZarkloff Yes but typically you should shoot for a maximum .5" water column design static on the blower. Usually unless it is a small simple system you will find that you will go into the grey area between .5" and 1" of water column. Be ware most blowers will stall before you get to 1" water column. ECM motors are making it easier and will compensate for some design? error but the same rules apply. They will fail as you approach 1"
By: tstatech. on 09 Aug 10, 03:14:23
@robw1031 The ROT I have heard is to increase the size to the next size when reading a sheet metal ductulator when using flex? or ductboard. If you pull flex straight and tight it will perform nearly as well as metal. The ductulator from ACCA has flex, duct board and duct liner.
By: tstatech. on 09 Aug 10, 03:09:35
@ComfortAirCompany I agree, It? is my experience that it is a prerequisite to be a installer before you become a service tech. Sadly most installers are little more than box cutters. The guys I learned from 20 years ago are still using rule of thumb to size equipment an ducts. The best installers come full circle from installer to tech and back to installer.
By: tstatech. on 09 Aug 10, 03:03:54
@ComfortAirCompany You can say that again.?
By: THEHVACTECH101. on 08 Aug 10, 22:49:59
@tstatech Thanks for clearing that? up
By: ComfortAirCompany. on 08 Aug 10, 22:07:35
@DrZarkloff Ya you're doing great. We techs typically only need to know rules of thumb like 300-400 cfms per ton, but designer and installers should learn? a lot more. The sad fact is that most of them haven't learned even the basics that you were teaching.
By: eggman9713. on 08 Aug 10, 21:08:36
@DrZarkloff Not for me. Looks like the numbering and whatnot is similar to the large one you showed, with maybe a tad less accuracy. And mine is a slide type, rather than a turning type. Much easier to use when marking duct sizes? on plans.
By: Nutintoitbut2doit. on 08 Aug 10, 18:03:11
@DrZarkloff Yes it will help you out in most jobs like replacing a duct or two, it is good to know how to read a ductulator not many techs know how, I like to use duct software that has both J & D in it. But I'm no duct expert, I know enough to be? dangerous lol. Keep up the good videos Dr. Z
By: tstatech. on 08 Aug 10, 18:00:22
@THEHVACTECH101 No, this is a common misconception. Friction Rate is not the same as Static Pressure. You are measuring static pressure with your? magnehelic gauge or monometer. You can go one step further and measure velocity pressure with your gauge if you have a pitot tube. Static pressure is like that in a balloon. Total pressure = static pressure + velocity pressure Friction rate is a way to assign a scale of resistance per 100' of equivalent feet of duct.