79 Residential Energy Inspector/Plans Examiner Exam Prep

79 RESIDENTIAL ENERGY INSPECTOR/PLANS EXAMINER STUDY GUIDE

Comprehensive Study Guide - Weighted by Exam Categories

Exam Overview:

• Code: 2021 IECC (Residential)
• Questions: 60 questions
• Time: 2 hours (120 minutes)
• Format: Open Book
• Passing Score: 70% (42/60 correct)
• Cost: $320

Category Breakdown:

1. General/Administration (14%) - 7 questions
2. Building Thermal Envelope (28%) - 14 questions
3. Mechanical Systems (22%) - 11 questions
4. Service Water Heating (8%) - 4 questions
5. Electrical/Lighting (12%) - 6 questions
6. Compliance Verification and Testing (16%) - 8 questions

CATEGORY 1: GENERAL/ADMINISTRATION (14% - 7 Questions)

1.1 Scope and Application (R101)

Residential buildings covered (R101.2):

• Detached one- and two-family dwellings
• Townhouses ≤ 3 stories above grade
• Group R-2, R-3, R-4 buildings ≤ 3 stories above grade

Building thermal envelope (R101.4.3):

• Definition: Elements of building enclosing conditioned space
• Includes: Walls, floors, ceilings, roofs, windows, doors
• Through which thermal energy may transfer to/from exterior

Common Test Questions:

• "Does the IECC apply to a 4-story apartment building?"
• Answer: No - residential provisions limited to ≤ 3 stories (R101.2)
• "What is the building thermal envelope?"
• Answer: Elements enclosing conditioned space through which heat transfers (R101.4.3)

1.2 Compliance Paths (R101.5)

Three compliance options:

1. Prescriptive Path (R402, R403, R404, R405):

• Meet specific requirements for each component
• R-values, U-factors, SHGC, air leakage
• Simplest for typical residential construction

2. UA Alternative (R402.1.5):

• Trade-offs between building envelope components
• Total UA (heat loss) must be ≤ prescriptive total
• Allows flexibility in design

3. Simulated Performance (R405):

• Energy modeling/software
• Proposed design vs standard reference design
• Annual energy cost of proposed ≤ annual energy cost of standard

Common Test Question:

• "What are the three compliance paths in the IECC?"
• Answer: Prescriptive, UA Alternative, Simulated Performance (R101.5)

1.3 Administration and Enforcement (R104, R105)

Building official authority (R104):

• Enforce IECC provisions
• Approve materials, equipment, systems
• Issue permits and certificates

Inspections (R104.2):

• Required before concealment of work
• Thermal envelope inspection
• Mechanical system inspection
• Final inspection

Alternative materials (R104.1):

• Building official may approve alternatives
• Must demonstrate equivalency

Certificate of compliance (R401.3):

• Must be posted on or in electrical panel
• Lists insulation R-values, fenestration U-factor/SHGC
• HVAC equipment types and efficiencies

Common Test Questions:

• "When must energy code compliance inspections occur?"
• Answer: Before concealment (R104.2)
• "Where must the certificate of compliance be posted?"
• Answer: On or in electrical distribution panel (R401.3)

1.4 Definitions (R202)

Critical terms to know:

Above-grade wall: Wall >50% above grade, enclosing conditioned space

Air barrier: Material or assembly that restricts airflow

Conditioned space: Area heated/cooled, directly or indirectly, for human comfort

Continuous air barrier: Combination of materials/assemblies that restrict airflow through building envelope

Continuous insulation (c.i.): Insulation uncompressed and uninterrupted by framing

Fenestration: Skylights, roof windows, vertical windows (glazed or opaque), opaque doors, glazed doors

Solar heat gain coefficient (SHGC): Fraction of solar radiation admitted through fenestration (0-1 scale)

Thermal envelope: See R101.4.3

U-factor: Heat transmission coefficient (Btu/h·ft²·°F) - LOWER is better

Common Test Questions:

• "What is continuous insulation?"
• Answer: Insulation uncompressed and uninterrupted by framing (R202)
• "What does SHGC measure?"
• Answer: Fraction of solar radiation admitted through fenestration (R202)

CATEGORY 2: BUILDING THERMAL ENVELOPE (28% - 14 Questions)

2.1 Insulation Requirements (R402.1, Table R402.1.2)

Climate zones: Determined by Table R301.1 or Figure R301.1

• Zone 1 (hottest) through Zone 8 (coldest)
• Sub-zones A (moist), B (dry), C (marine)

Table R402.1.2 - Minimum R-Values by Climate Zone:

Zone 3 Example (common in southern US):

• Ceiling R-value: R-30 (wood frame) or R-38 (with raised-heel truss)
• Wood frame wall: R-20 or R-13 + R-5 c.i.
• Mass wall: R-8/R-13
• Floor: R-13 (wood frame)
• Basement wall: R-5/R-13
• Slab: R-10, 2 ft
• Crawl space wall: R-10/R-13

Zone 5 Example (northern US):

• Ceiling: R-49
• Wood frame wall: R-20 or R-13 + R-10 c.i.
• Mass wall: R-13/R-17
• Floor: R-30
• Basement wall: R-10/R-13
• Slab: R-10, 4 ft
• Crawl space wall: R-10/R-13

Zone 7 Example (very cold):

• Ceiling: R-49
• Wood frame wall: R-20 + R-5 c.i. or R-13 + R-10 c.i.
• Mass wall: R-19/R-21
• Floor: R-30
• Basement wall: R-15/R-19
• Slab: R-10, 4 ft
• Crawl space wall: R-10/R-13