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The Dryer Vent Code in Drawings: Measure, Terminate and Inspect Any Run in the Same Order One Drawing for Every Rule

Airflow path, rigid metal duct, the 35-foot rule, elbow deductions, terminations, gas dryers, the 6-step inspection, rotary brush cleaning and multifamily runs. Every topic has its own page: the drawing first, then what you need to remember. 68 illustrated pages.

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Every topic, its own pageEach rule drawn, with the explanation right beside it
68 illustrated pages9 parts, from the airflow path to the truck checklist
Up-to-date sourcesIRC M1502, IMC 504 and NFPA 54
PDF by emailFormat

Look Inside the Book

Every page has one big drawing and a box with the numbers you need to know:

Drum → lint screen → outlet → transition duct → wall box → concealed duct → hood, all labeled.
Drum → lint screen → outlet → transition duct → wall box → concealed duct → hood, all labeled.
Concealed duct: smooth-wall metal, 0.016 in (No. 28 gage) minimum.
Concealed duct: smooth-wall metal, 0.016 in (No. 28 gage) minimum.
IRC default: 35 ft max developed length, transition duct not counted (VERIFY).
IRC default: 35 ft max developed length, transition duct not counted (VERIFY).
Code default: terminate at least 3 ft (914 mm) in any direction from openings, including ventilated soffits.
Code default: terminate at least 3 ft (914 mm) in any direction from openings, including ventilated soffits.
Gas dryer cutaway: burner, drum and the exhaust path carrying combustion products outdoors
Gas dryer cutaway: burner, drum and the exhaust path carrying combustion products outdoors
Six numbered stations: dryer → transition → concealed run → termination → airflow → report.
Six numbered stations: dryer → transition → concealed run → termination → airflow → report.
Air whip setup: air in at the dryer side, lint out at the hood, vacuum on both ends
Air whip setup: air in at the dryer side, lint out at the hood, vacuum on both ends
Multifamily: one independent duct per dryer, 35 ft default minus fittings, label if over 35 ft equivalent.
Multifamily: one independent duct per dryer, 35 ft default minus fittings, label if over 35 ft equivalent.

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These are real pages from the book. The table of contents is the full one: 9 parts and 64 topics.

The Problem Isn't You. It's How It Was Explained to You.

You're standing in a laundry room. The run goes up the wall, across the attic and out the roof. The homeowner asks if it's too long, and you need a number.

You read the section last night: developed length, transition duct, fittings, the manufacturer's table. The code lays it all out in paragraphs, so nothing lines up when you need it.

IRC default: 35 ft max developed length, transition duct not counted (VERIFY).

In the book, the 35-foot rule is one page: the run drawn from the dryer to the hood, 35 ft in an orange box, and the transition duct marked as not counted. VERIFY sits next to the number, so you check your edition.

Same with rigid metal duct, the 3-foot termination clearance, gas dryers and the 6-step inspection: each one has its own page.

You look at the run, follow the drawing, do the math. You give the homeowner an answer without going back to the manual.

COMPARE FOR YOURSELF

The Same Topic, Two Ways to Study It

THIS
  • The manual: line after line
  • Duct materials explained only in words
  • You show up to the exam still unsure
Exhaust ducts serving clothes dryers shall be constructed of metal having a minimum thickness of 0.016 inch (0.4 mm), corresponding to No. 28 gage, and shall have a smooth interior finish. The nominal diameter shall be not less than 4 inches (102 mm). Duct sections shall not be joined with screws or similar fasteners that protrude more than 1/8 inch (3.2 mm) into the interior of the duct, and the male end of each section shall be oriented in the direction of airflow, except where the manufacturer's installation instructions provide otherwise.
FOR THIS
  • The concealed duct in one drawing
  • Thickness and diameter in one box
  • No. 28 gage, 4 in, male end with the airflow: one look
Concealed duct: smooth-wall metal, 0.016 in (No. 28 gage) minimum.
CONTENTS

Take a Look at the 9 Parts and 64 Topics

How the system works, materials and duct, maximum duct length, terminations, gas dryers, the inspection method, cleaning and airflow, multi-story and commercial, and the review and job kit: 68 pages, all illustrated.

IHow the System Works · pp. 5-11
  1. The Airflow Path: Drum to Termination
  2. Why Dryer Vents Catch Fire
  3. Electric vs. Gas: What Changes for the Vent
  4. The Code Map: Which Rule Applies Where
  5. Manufacturer Instructions vs. the Code Default
  6. Always Outdoors: Never Attic, Crawlspace or Chimney
  7. What a Dryer Exhaust Technician Does
IIMaterials and Duct · pp. 12-20
  1. Rigid Metal Duct: 0.016 Inch Minimum
  2. 4-Inch Nominal Diameter: Never Smaller
  3. Transition Duct: UL 2158A, 8 Feet Max
  4. Foil, Vinyl, Semi-Rigid: What Passes
  5. Joints: Male End Points Downstream
  6. Fasteners: No Screws Inside the Duct
  7. Support and Securing the Run
  8. Protective Shield Plates in Framing
  9. Dryer Boxes and Tight Spaces
IIIMaximum Duct Length · pp. 21-30
  1. The 35-Foot Base Rule
  2. Each Elbow Costs Length: 5 ft and 2.5 ft
  3. Where You Measure From and To
  4. Worked Example 1: Straight Wall Run
  5. Worked Example 2: Attic Run with 45s and 90s
  6. Worked Example 3: Fixing a Run That Fails
  7. Using the Manufacturer's Length Table
  8. Long-Radius Elbows and Fitting Equivalents
  9. The Duct Length Label
  10. Power Ventilators (DEPV): UL 705
IVTerminations · pp. 31-36
  1. Termination Location: 3 Feet from Openings
  2. Backdraft Damper: Required, No Screens
  3. Wall Hood Types Compared
  4. Roof Terminations
  5. Soffits and Eaves: Why They Cause Trouble
  6. Termination Clearances to Check
VGas Dryers · pp. 37-42
  1. What a Gas Dryer Adds: Combustion and CO
  2. Key Gas Rules: IFGC 614 / NFPA 54
  3. Makeup Air and Closet Installs
  4. Gas Connector and Shutoff: Look, Don't Service
  5. CO Warning Signs: When to Stop
  6. Ventless Dryers: Condensing and Heat Pump
VIThe Inspection Method · pp. 43-51
  1. The 6 Steps, Always in the Same Order
  2. Step 1: The Dryer
  3. Step 2: The Transition Duct
  4. Step 3: The Concealed Run
  5. Step 4: The Termination
  6. Step 5: Airflow Velocity and CFM
  7. Static Pressure with a Manometer
  8. Step 6: Pass, Repair or Replace
  9. Common Findings in the Field
VIICleaning and Airflow · pp. 52-57
  1. Rotary Brush Cleaning
  2. Air Whips, Compressed Air and Containment
  3. Lint Trap Housing and Dryer Cabinet
  4. Before-and-After Airflow Readings
  5. How Often to Clean
  6. Job Site Safety
VIIIMulti-Story and Commercial · pp. 58-63
  1. Multifamily: Individual Runs
  2. Common Exhaust Systems: IMC 504.10
  3. Fire-Rated Shafts and Penetrations
  4. Commercial Dryers: IMC 504.9
  5. Booster Fans and Monitoring
  6. Cleanouts and Lint Collection in Large Systems
IXReview and Job Kit · pp. 64-68
  1. Every Number on One Page
  2. Length Math in 3 Steps
  3. Pass or Fail: 10 Quick Calls
  4. Explaining a Failing Vent to the Customer
  5. The Truck Checklist

One Page, One Topic, All Clear

Think of it this way:

You're on a job in a three-story building. Twelve units, twelve dryers, and the property manager wants to know where each one should vent.

You open the multifamily pages: an independent duct per dryer, or a common exhaust shaft only where IMC 504.10 allows it, the 35 ft default minus fittings, and the label if the run goes over.

Gas dryer cutaway: burner, drum and the exhaust path carrying combustion products outdoors

Same with the transition duct, backdraft dampers, gas dryers and CO warning signs, airflow readings and rotary brush cleaning: each one on its own page.

Dryer Exhaust Technician Illustrated is 9 parts and 64 topics, all drawn, and it ends with every number on one page, length math in 3 steps and 10 quick pass-or-fail calls.

What you see drawn, you don't have to memorize.

What's Inside Dryer Exhaust Technician Illustrated:

Ipp. 5-11

How the System Works

The airflow path from drum to termination, why vents catch fire, electric vs. gas, which code applies where, manufacturer instructions vs. the default, and what the technician does.

IIpp. 12-20

Materials and Duct

Rigid metal duct at 0.016 in, the 4-inch diameter, UL 2158A transition duct, what passes and what doesn't, joints, fasteners, supports, shield plates and dryer boxes.

IIIpp. 21-30

Maximum Duct Length

The 35-foot base rule, what each elbow costs, where you measure from and to, three worked examples, the manufacturer's table, the length label and power ventilators.

IVpp. 31-36

Terminations

Where the termination goes, the 3-foot clearance, backdraft dampers without screens, wall hoods, roof terminations and why soffits cause trouble.

Vpp. 37-42

Gas Dryers

What a gas dryer adds, IFGC 614 and NFPA 54, makeup air and closet installs, the gas connector you look at but don't service, CO warning signs and ventless dryers.

VIpp. 43-51

The Inspection Method

The 6-step inspection in the same order: the dryer, the transition duct, the concealed run, the termination, airflow and static pressure readings, and the pass, repair or replace call.

VIIpp. 52-57

Cleaning and Airflow

Rotary brush cleaning, air whips and containment, the lint trap housing, before-and-after airflow readings, how often to clean and job site safety.

VIIIpp. 58-63

Multi-Story and Commercial

Individual multifamily runs, common exhaust under IMC 504.10, fire-rated shafts, commercial dryers, booster fans and cleanouts in large systems.

IXpp. 64-68

Review and Job Kit

Every number on one page, length math in 3 steps, 10 quick pass-or-fail calls, how to explain a failing vent to the customer and the truck checklist.

At the end of the book: Every number on one page, length math in 3 steps, 10 pass-or-fail calls and the truck checklist.

SHOW ME WHAT'S INSIDE

Plus: 2 Free Books

Dryer Exhaust Practice Test: Exam-Style Questions with Answers

BONUS 1: «Dryer Exhaust Practice Test: Exam-Style Questions with Answers»

Value on its own: US$ 17.90

Check what you really know before exam day: exam-style questions on length, materials, terminations and gas dryers, each answer explained with the page to review.

The 15 Most Common Dryer Vent Mistakes: Before & After

BONUS 2: «The 15 Most Common Dryer Vent Mistakes: Before & After»

Value on its own: US$ 14.90

Spot the installation errors you see on the job at a glance: each mistake drawn next to the correct fix, ready to show the homeowner.

Dryer Exhaust Technician Illustrated with 2 Free Books

  • Dryer Exhaust Technician Illustrated: 68 illustrated pagesUS$ 63
  • BONUS 1: Dryer Exhaust Practice Test: Exam-Style Questions with AnswersUS$ 17.90
  • BONUS 2: The 15 Most Common Dryer Vent Mistakes: Before & AfterUS$ 14.90
  • High-resolution PDF to printIncluded
Total value US$ 95.80
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Who This Book Is For

You're adding dryer vents to your business

You're adding dryer vents to your business

You already sweep chimneys or clean air ducts. The book gives you the dryer vent system drawn piece by piece, with the code numbers in one place.

Your technician exam is coming up

Your technician exam is coming up

Length math, materials, terminations and gas rules each sit on one page, and the practice test shows you which page to review before exam day.

You're already on the job

You're already on the job

Print the pages you use most and keep them in the truck. When a homeowner asks why the vent fails, you show the page.

Everything You Get Today

US$ 95.80US$ 27
YES, I WANT DRYER EXHAUST TECHNICIAN ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.

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Try Dryer Exhaust Technician Illustrated for 30 days, bonus books included.

We refund everything if the file won't open, if the book isn't what you see here, if you were charged twice or if the email doesn't arrive. Just email us.

You pay once. No subscriptions.

Frequently Asked Questions

Is it for me if I've been in the trade for years?

Yes. It isn't a beginner's book: it puts the code numbers, the length math and the inspection steps in order, one page each, so you review fast and can explain them to a customer.

Where does the content come from?

It's checked against IRC Section M1502, IMC Section 504, IFGC Section 614 and NFPA 54, the UL 2158A and UL 705 listings, and manufacturer installation instructions. Most states and cities adopt the IRC, but each picks its own edition and may amend it, so every code value is marked VERIFY: check it against what your jurisdiction uses.

Is this official material?

No. It's independent study material, not issued or endorsed by any certifying organization, code body or manufacturer, and it doesn't come with a certificate. It covers the code and inspection topics in IRC M1502, IMC 504 and IFGC 614. Before you buy, compare the table of contents with your certifying body's exam outline.

Does it replace a training course?

No. It's a visual study and review aid. It doesn't replace hands-on training, a certification course or your local code official.

Are the practice questions the ones on the exam?

No. They're written for this book in an exam style. They aren't official questions from any exam.

When and how do I get it?

The book and the 2 bonus books are PDFs sent by email to the address you enter at checkout.

Do I have to pay every month?

No. It's a one-time payment. No subscription.

Can I have it on paper?

Yes. It's a printable PDF: print the whole book or just the pages you want to keep in the truck.

How does the refund work?

You have 30 days. We refund everything if the file won't open, if the book isn't what you see on this page, if you were charged twice or if the email doesn't arrive: just email us.

Before You Close This Page

No more rereading code sections that don't stick.

The 35-foot rule and the elbow deductions: you see them drawn and you're done.

You walk into the exam knowing where every number is.

Drawings make studying faster.

The book is right below.

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