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Start with the question in front of you. These resources are educational; confirm the adopted edition, amendments and AHJ before project use. Project engineering begins with a written scope.
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Choose a task, then open the relevant topic, field tool, PDF or Daily Code Talk article.
Permit or comment letterFind the review path and the documents to send.
Ventilation and outdoor airTrace the air path, inputs and drawing basis.
Kitchen and special exhaustCoordinate hood, exhaust, makeup air and discharge.
Ducts and rated assembliesCheck the duct path, plenum and damper handoff.
Combustion and ventingIdentify the appliance, listing and venting record.
Electrical and recertificationFind the service, access or existing-building issue.
Existing work and closeoutLocate the change, inspection or field record.
Full resource directory, A–Z244 unique links · open directory
Browse A–Z or search by topic, code section, task or format. Topic pages, tools, PDFs and project paths are included.
- 0.05 in. w.g., 200 fpm, 6 ft Layer — IMC 512.60.05 in. w.g. · 200 fpm · 6 ft
- 1.08 / 500 / 12,000Thumbs are not a load
- 1.5× Leak Test, UL 864, 15-min UPS — IMC 512.101.5× leak · UL 864 · 15-min UPS
- 1 cfm per Square Foot at the Floor — IMC 502.121 cfm/ft² at the floor
- 1 cfm per Square Foot in the Dry-Clean Room — IMC 502.61 cfm/ft² or the loading door
- 25/50 Listings in the Plenum — IMC 602.3Foam and PVC out
- 2% Slope and a Cleanout Every 20 Feet — IMC 506.3.72% · cleanout every 20 ft
- 40-year noticeTwo seals · 90 days
- 90.3–90.6Finding the section
- A ¾-Inch Undercut Is Not a Return — IMC 601.5¾ in is not a return design
- Abandoned Chimney and Vent Openings — IMC 801.8Cap by contractor is not a detail
- A Box Fan at the Roll-Up Is Not Floor-Resurfacing Exhaust — IMC 502.7Box fan is not exhaust
- A Capped Collar Is Not Projector Exhaust — IMC 502.11200 / 300 cfm per lamp
- A Ceiling Fan Is Not Dust Collection — IMC 502.17Collector on the machine
- A Ceiling Grille Is Not Aircraft Fueling Exhaust — IMC 502.2Floor level or in the slab
- A CO Sensor on the Floor Above Is Not Pit Exhaust — IMC 502.13Inlet in the hole, not the floor above
- A Damper in the Common Dryer Shaft — IMC 504.10–504.11No damper in the common shaft
- A Damper Nobody Can Reach Is Not Coordinated — IMC 607.412×12 and a ½-inch label
- A Fire Damper in a Grease Shaft Is Prohibited — IMC 607.5.5No damper in a grease shaft
- A Generic FSD Tag Is Not a Schedule — IMC 607.3FSD is not a schedule
- Air Dispersion Systems Are Not Generic Fabric Duct — IMC 603.17Not above a ceiling. UL 2518.
- Air Filters — IMC 605Filter it before the coil
- A Liner Does Not Automatically Fix Clearance — IMC 801.18.4Relining is not zero-clearance
- A Parapet You Never Measured Is Not 304.11 — IMC 304.1110 ft · 42 in · not the parapet
- Approved, Listed, Labeled, Identified — NEC 100Mark is not a blank check
- Area Served — Mark the Unit and the Schedule — IMC 304.12Tag the unit and the schedule
- A Restroom Fan Is Not Salon Exhaust — IMC 502.2012 inches from the chemicals
- ASHRAE 170 Room Types — IMC 407Map the room first
- ASHRAE 34 / 608A2L is not a drop-in
- A Toilet Fan Is Not Range Ventilation — IMC 502.19Lead air, not a toilet fan
- A Transfer Grille Across a Smoke Barrier — IMC 512.5A/Aw · Class II 250°F
- A Transfer Grille Is Not Battery Exhaust — IMC 502.3–502.5Not a storage closet
- Atrium Exhaust Is Not IBC 909 Smoke Control — IMC 512Not atrium exhaust with a fan note
- A Unit on the Garage Slab Is Not 304.6 — IMC 304.68 ft public / 6 ft private
- A Wall Fan Is Not a Tailpipe Hose — IMC 502.14Not a wall fan
- Dip and powder exhaust - IMC 502.7.4-502.7.6Not a spray booth
- Before the pourElectrode visible
- Board of Appeals — IMC 113Do not assume five members
- Boiler and Furnace Rooms — A Closet Is Not IBC Protection — IMC 304.8A closet is not IBC protection
- Book a 30-minute scoping callExternal booking link
- CFM Does Not Fix a Short Hood — IMC 507.1.6CFM will not fix a short hood
- Change of occupancyMEP problem first
- Chapter 9 overview — IMC 901.1–901.4IMC vs fuel-gas, occupancy
- Chimney Connector Wall Pass-Through — IMC 803.10.46 in is not System C
- Chimney Entrance and Cleanouts — IMC 801.1212 in inlet · 6 in opening
- Cleaning Is Not Proof the Liner Is Sound — IMC 801.18.2Sweeping is not reuse
- Clearance Reduction — IMC 308Listing first
- Clothes Dryer Exhaust — IMC 504No screens, no screws
- Code Compliance Agency — IMC 103Wrong queue sits
- Code ReliefNot amnesty
- Combustion-air field toolCombustion-air tool
- Combustion air for fuel-fired equipmentFuel Gas 304, not IMC 703
- Condensate Disposal — IMC 307If the primary stops, where does it go?
- Connecting an Appliance to a Fireplace Flue — IMC 801.10Listed + still cleanable
- Connect on the Inlet Side of a Power Exhauster — IMC 801.14Fan symbol is not the boundary
- Connector Clearance to Combustibles — IMC 803.10.618 in is not every connector
- Connector Dampers and Common-Vent Entries — IMC 803.5–803.7Smaller connector enters higher
- Connector Material and Thickness — IMC 803.8–803.9Diameter without gage
- Connector Support, Length, Entry, and Slope — IMC 803.1075% · 1/4 in per ft
- Construction Documents — IMC 106If it is not to scale
- Contamination Prevention in Plenums — IMC 601.4Above the ceiling is not approved
- Continuous load3 hours or more
- Cooling towerNot mechanical-only
- Dampered Combustion Air — IMC 701Prove it is open
- Decorative Shrouds on Factory-Built Chimneys — IMC 805.7Look-alike is not listed
- Dedicated Flue for Solid-Fuel Appliances — IMC 801.11Looks unused is not dedicated
- Developer first questionUse, envelope, which desk
- Direct-Vent & Mechanical Draft — IMC 804Name the category first
- Domestic vs Commercial Cooking Exhaust — IMC 505A residential range used commercially is not 505
- Do Not Mix. Do Not Share the Shaft. — IMC 509.4One header is not 509.4
- Duct Construction — IMC 603Flex through a wall is not a connector
- Duct Insulation — IMC 60424 in at the coil
- Duct leakageNot ACH50
- Duct Smoke Detection — IMC 606Over 2,000 cfm on the return
- Dust exhaust recirculation — IMC 510.1.3All three or outdoors
- Dust recirculation criteria — IMC 510.1.3All three or outdoors
- Dust, Stock & Refuse Conveying — IMC 510Fire-code system
- Duties of the Code Official — IMC 104Cannot waive
- Electrical recertSend the notice
- Email insteadEmail contact option
- Enclosed garage ventilationEnclosed garage tool
- Enclose From the Ceiling Punch to the Outlet — IMC 506.3.11Spot wrap is not an enclosure
- Energy Recovery Ventilation — IMC 513Name the airstream
- Enviar antecedentes (ES)Spanish project intake
- Equipment Access — IMC 30630×30 drawn
- Equipment Location — IMC 303Public way and openings
- Equipment Pad — Three Inches Above Grade — IMC 304.103 in above grade
- Equipment setback10-foot survey
- Exhaust Discharge — IMC 501.3Not into the attic
- Exhauster Sizing and Natural-Draft Connections — IMC 804.3.6–804.3.7Not CFM
- Exhaust Opening Protection — IMC 501.3.2¼–½ in · AMCA 550
- Existing building / due diligenceRecords and due diligence
- Existing Chimneys and Vents — IMC 801.18Remain is not a design
- Exit Enclosure Ventilation Is Independent — IMC 601.3Independent of general HVAC
- Explosion Control — IMC 310Name the occupancy
- Explosion Control Is Not “By Others” — IMC 510.1.5By others is not 510.1.5
- Factory-Built Chimney Insulation Shields — IMC 805.826 ga · 2 in above insulation
- Factory-Built Chimney Offsets and Support — IMC 805.430° · four elbows
- Factory-Built Chimneys — IMC 805A line is not a listing
- Factory-Built Fireplaces — UL 127 Is the System — IMC 903UL 127 system
- FAQFrequently asked questions
- Field toolsInteractive field screens
- Fire and Smoke Dampers — IMC 607Name the assembly first
- Fire deskSecond fee desk
- Fire Wall ≠ Fire Barrier — IMC 607.5.1FD alone is not enough
- Flexible Ducts at Rated Assemblies — IMC 607.7Does not cross the rated line
- Flood Elevation, Weather Jacket, 4 in of Earth — IMC 603.13IBC 1612 · 4 in of earth
- Florida HB 803 exemptionsMechanical still needs a permit
- Gasoline Sits on the Slab — IMC 502.1.218 inches above the floor
- General Regulations — IMC 301Listed is not installed
- General Venting — IMC 801Vent to exterior is not a design
- Grease outlet40 in above the roof
- Hazardous Exhaust — IMC 509Direct outdoors
- Healthcare & Ambulatory Ventilation — IMC 407Not Table 403
- Herramientas de campo (ES)Spanish field tools
- HomeMasterBuild overview
- Hood + interceptorOne job, two sheets
- How to applyUnincorporated Miami-Dade (folio 30) · upfront fees
- HVAC Load Calculations — IMC 312Recognized method, not a guess
- HVAC on an existing / odd envelopeConstruction type and HVAC scope
- Hydrogen Accumulates at the Ceiling — IMC 304.5Does not wait at the floor
- Hydrogen Does Not Wait at 18 Inches — IMC 502.16Low inlet · high outlet
- I am about to upload a setPre-upload review route
- I am not sure yetProject intake guide
- I have a comment letterComment-letter response route
- IMC Applicability — IMC 102Grandfathered is not a note
- IMC Scope — IMC 101Fuel gas is the fuel-gas code (IFGC)
- Impact feesNot the mechanical sheet
- I need sealed MEP drawingsEngineering service
- Intake Protection and Screens — IMC 401.5Brochure ≠ Table 401.5
- Kitchen exhaustType I vs Type II
- Kitchen / hood / makeup airKitchen exhaust tool
- Kitchen Makeup Air — IMC 508Part of the hood
- Listed Vents — IMC 802Diameter is not a listing
- Loads / ESP / HRC spreadsheetCalculation support
- Low-Rise Residential Ventilation — IMC 403.3.2Equation 4-9
- Manually Fired Appliances with Mechanical Draft — IMC 804.3.8Fan symbol is not the sequence
- Masonry Chimney Flue Lining — IMC 801.15Existing is not a liner
- Masonry Chimneys Follow the IBC — IMC 801.3Not a mechanical-only note
- MD field packetsPE PDFs — not County forms
- MD mechanical reviewGuideline ≠ the comment
- MD portalsApply · track · inspect
- Means of Appeals — IMC 112Board cannot waive
- Mechanical Draft and Power Exhausters — IMC 804.3Fan is not the interlock
- Mechanical Inspections — IMC 111Called in is not approved
- Mechanical Permits — IMC 105Exemption is not a holiday
- Mechanical Ventilation & Outdoor Air - IMC Chapter 4Breathing-zone outdoor air estimator
- Medium-Heat Factory-Built Chimneys — IMC 805.6Above 1,000°F → UL 959
- MEP baseline PDFDownloadable fee baseline
- MEP fee categoriesHood, temp, interceptor
- Metal Chimneys — IMC 806NFPA 211 is the path
- Miami-Dade 180-Day Permit Clock — A Fail Does Not ExtendA fail does not extend
- Miami-Dade or Broward letter?Find the reviewing agency
- Miami-Dade permit resourcesLocal permit paths and records
- Miami-Dade plan reviewAccepted is not in review
- Minimum Chimney and Vent Size — IMC 801.6Diameter is not area
- MoratoriumA new RTU is not a fence
- Motor Out of the Airstream — IMC 506.5Hinge, cable, grease drain
- Natural Ventilation — IMC 4024% on the sheet
- NEC 110.14 Connections, Temperature Limitations & Torque90°C is not 90°C ampacity
- NEC 110.4–110.8 Voltage, Conductors & Wiring Methods#4 is not a specification
- Neutral vs groundA ground is not a neutral
- “No Hood Required” Needs a Listing — IMC 507.1“No hood” needs a listing
- No Multistory Common Venting — IMC 801.19Two floors, one shaft
- No Portable Ladders Above 16 Feet — IMC 306.5No portable ladders
- No sewer at the streetSanitary service feasibility
- Notice of Approval — IMC 107Underground ≠ rough-in
- Notice of CommencementConfirm live
- Notices of Violation — IMC 114A field substitution is a violation
- Oil-Fired Appliances and NFPA 31 — IMC 801.2NFPA 31 is not optional
- osmany.portal@masterbuildconsulting.comEmail contact option
- Outdoor-Air Intake Location — IMC 401.4Nearest edge
- Over 600°F Is a Chimney — IMC 510.2Not a kitchen typical
- Over MAQ Is Dedicated Exhaust — IMC 502.8Not “exhaust per code”
- Paid field guidesPaid field guides and templates
- Parking Garage Ventilation — IMC 404Full-On / Standby
- Pellet Appliances — ASTM E1509 Is the Path — IMC 904ASTM E1509, not a generic stove
- Permit commentsSend the letter
- Permit Fees and Valuation — IMC 108Not valid until paid
- Piping Support — IMC 305Not from gypsum
- Plastic Vent Joints and Blocked-Vent Switch — IMC 801.20–801.21Plastic is not plumbing pipe
- Plenum Cable, Wet-Pipe Only, UL 2043 — IMC 602.3CM and dry CPVC out
- Plenums — IMC 602Say so. List what is in it.
- Plumbing inspectionDry pan is a story
- Plumbing was just “value-engineered”Scope and code impacts
- Positive Flow — What Creates the Draft? — IMC 801.4–801.5What creates the flow?
- Positive-Pressure Venting — IMC 801.9A leak pushes products out
- Power-Exhauster Horizontal Terminations — IMC 804.3.3–804.3.4Clear wall is not clear space
- Private well / water-service questionWell and water-service record
- Protection of Structure — IMC 302Do not cut the rated line
- Qué enviar (ES)Spanish project intake guide
- Readily accessibleA ladder is not it
- Recirculation Limits — IMC 403.2.1Return is not outdoor air
- Registers, Grilles, and Diffusers — IMC 603.18Not finish items
- Required Exhaust — IMC 502Process / battery / spray
- Return Air & Corridors — IMC 601A corridor is not a duct
- Reuse Cleanout — Hidden by the New Equipment — IMC 801.18.3Size can still fail cleanout
- Reuse Does Not Mean the Same Chimney Size — IMC 801.18.1Reuse is not same size
- SCCRBreaker ≠ package
- SD, CD, and CRD Are Not Interchangeable — IMC 607.5.4SD, CD, CRD — three products
- Send Project BackgroundProject intake
- Smoke and Heat Vents — IMC 311Not a smoke-control system
- Solid-Fuel Flue Size Cap — IMC 801.7Larger is not automatically better
- Space Around a Chimney Liner Is Not a Second Flue — IMC 801.17Leftover space is not a flue
- Spray Cannot Run If the Fan Is Off — IMC 502.7Gun dies if the fan dies
- Sprinklered Is Not a Fire-Partition Exception — IMC 607.5.3Sprinklered is not an exception
- Static CRD vs a Fan That Runs in a Fire — IMC 607.6Static vs dynamic CRD
- Stop Work Order — IMC 115A verbal lift is not a lift
- Stud Bays Are Not Supply Duct — IMC 602.2Stud bay is not supply
- TCONot a CO
- Temperature control — IMC 309Space heater is not a system
- Temporary Equipment — IMC 110Temporary is still permitted equipment
- Temp powerNot a work-with
- Tenant improvement / shellMEP scope for tenant work
- Test Grease Duct Before You Wrap It — IMC 506.3Test before you wrap
- Test Underground Duct Before You Pour — IMC 603.8Test before you pour
- The Detector Has to See the Whole Airstream — IMC 606.3Symbol is not 606.3
- The Symbol Is Not the Listing — IMC 607.2The symbol is not the listing
- Transfer Air & Pressure — IMC 501.4Exhaust without makeup is pressure
- Type I Auto-Start, 15 Minutes, Capture Test — IMC 507.1.1Auto-start · 15 min · capture test
- Type II Hood Ducts & Terminations — IMC 506.43-10-10-10-30
- Type II Hoods — IMC 507.3Not general exhaust
- Type I Is Not a Schedule Label — IMC 507.2cfm/ft. Wrap is not enclosure.
- Type L Termination Caps and Both Manufacturers — IMC 802.3–802.4Listed Type L cap
- Type L Vent Termination Heights — IMC 802.5–802.6Two checks, not one typical
- UL 1046, 45°, and NET cfm — IMC 507.2.8UL 1046 · 3.5 ft charbroil
- Uninhabited Spaces — IMC 406Openings or 0.02 cfm/ft²
- Utility Connection — IMC 109Meter-set is not the building department’s yes
- Vapor Retarder and Weather Barrier Are Not the Same — IMC 604.11–604.12Not just R-value
- Variance clockThree years unused
- Ventilation Controls — IMC 405Including VAV turndown
- Vent Support and Insulation Shields — IMC 802.7–802.8Collar does not hold the vent
- Vent Terminal Clearance to Door Swing — IMC 802.912 in, not a closer
- Vertical Mechanical-Draft Terminations — IMC 804.3.5This roof is not the check
- Wall openingsA louver is an opening
- Water heater next to a garageEquipment installation topic
- When Ventilation Is Required — IMC 401.2Tight dwellings ≠ windows-only
- Which Code Governs This Vent? — IMC 801.1IFGC vs IMC Chapter 8
- WHU screeningParapet ≠ 306.5
- Workforce housingExpedite is not skipped review
- Work-withFPL drop and pick up
- Zone to System Outdoor Air — IMC 403.3.1.1Breathing-zone air is not zone outdoor air
- Zoning as MEPPad, use, variance — not a copied form
- Zoning checklistWhat they actually ask for
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