1. Purpose

This packet provides builders, modular manufacturers, HVAC contractors, and inspectors with the complete requirements needed to achieve EPA Indoor AirPLUS v2 certification, including CFIS ventilation specifications.

2. Moisture Management Requirements

- Drainage plane: ASTM E2556 Type I or II, fully taped with shingle-style integration.

- Flashing: AAMA 711/714 compliant; pan flashing under all windows and exterior doors.

- Kickout flashing at roof-to-wall intersections.

- Gutters/downspouts: discharge ≥5 ft from foundation or to approved drain.

- Foundation waterproofing required.

- Capillary break under bottom plates; 10 mil poly under slab.

- Crawlspaces (if built): sealed, conditioned, insulated at walls.

3. Pest Barriers

- Seal all penetrations ≥ 1/4 inch with pest-resistant sealant.

- Termite protection per SC building code.

- Maintain minimum 6-inch soil clearance at siding.

- Avoid placing mulch within 12 inches of building.

4. HVAC Design Requirements (Manual J/S/D)

- Manual J: Room-by-room load calculation.

- Manual S: Equipment selection within ±15% of Manual J loads.

- Manual D: Duct design sized for ≤0.36 in. w.c. external static pressure.

- AHRI certificate for installed heat pump model.

5. HVAC Installation Requirements

- ECM blower motor required.

- Duct leakage target: ≤4 CFM25 per 100 sq ft.

- Refrigerant charge verified via manufacturer-approved method.

- Line set insulation thickness ≥3/8".

- Condensate pan + float switch required.

6. CFIS System Specifications (Mechanical Ventilation)

- Ventilation airflow meets ASHRAE 62.2:

Formula: 0.03 × floor area + 7.5 × (bedrooms + 1)

- Motorized damper required (normally closed, fail-safe).

- Outdoor air duct connects to return duct downstream of filter.

- Intake placement:

- ≥10 ft from exhausts

- ≥2 ft above grade

- ≥3 ft from operable windows/doors

- Screened (≤1/4" mesh)

- Duct should be rigid or semi-rigid; minimize long flex runs.

- MERV 13 preferred; MERV 11 minimum.

- Filter must be upstream of coil; rack must be sealed against bypass.

- Pressure drop ≤0.25 in. w.c. or ECM auto-compensation documented.

- Outdoor airflow verification using flow hood required.

- Controller must allow continuous or intermittent scheduling.

- Noise criteria: Bath fans ≤1.0 sone if used in CFIS operation.

7. Radon-Ready Construction

- Gravel layer under slab.

- 10 mil poly vapor barrier.

- T-fitting + vertical 3" PVC vent run to roof.

- System labeled “Radon System.”

8. Materials Requirements (Low-VOC)

- Paints: <50 g/L (flat), <150 g/L (non-flat).

- Adhesives and sealants: SCAQMD Rule 1168 compliant.

- Composite wood: CARB Phase 2 or TSCA Title VI compliant.

- Carpet + pad: CRI Green Label Plus certified.

9. Air Sealing Requirements

- Blower door target: ≤3.0 ACH50 (preferred ≤2.5 for ZERH alignment).

- Seal top plates, rim joists, attic access, drywall/subfloor seams.

10. Commissioning Requirements

- Whole-house mechanical ventilation test.

- Room pressure balancing: ≤3 Pa difference.

- HVAC external static pressure measurement.

- Radon test recommended post-occupancy.

- Document all CFIS airflow, damper verification, and controller settings.

11. Required Documentation for Indoor AirPLUS v2

- Manual J/S/D package.

- AHRI certificate.

- Ventilation airflow test form.

- CFIS damper verification sheet.

- Filter specification sheets.

- VOC certifications for paints, adhesives, flooring, cabinetry.

- Moisture management photo log.

- Radon system rough-in photos.

- Blower door and duct leakage reports.

------------------------------------------------------------

Builder Summary

1. Moisture & Site

- WRB taped, lapped shingle-style.

- Pan flashing at all windows/doors; kick-out flashing.

- Downspouts discharge ≥5 ft from foundation.

- Foundation waterproofed; poly under slab.

- Maintain 6" soil clearance; no mulch within 12".

2. HVAC & CFIS

Heat Pump / Ducts:

- ECM blower motor.

- Duct leakage ≤4 CFM25/100 ft².

- Line sets insulated ≥3/8".

CFIS Fresh-Air:

- Fresh-air intake: ≥10 ft from exhausts, ≥2 ft above grade, ≥3 ft from windows/doors.

- 6" insulated duct → return duct (downstream of filter).

- Motorized damper (normally closed).

- MERV 11–13, 4" media filter upstream of coil.

- Verify airflow meets ASHRAE 62.2.

- Bath fans ≤1.0 sone if used.

3. Radon-Ready

- 3" PVC radon vent to roof; gravel + 10 mil poly under slab.

4. Interior Materials

- Low-VOC paints, adhesives, sealants.

- TSCA Title VI / CARB2 composite wood.

- CRI Green Label Plus carpet/pad.

5. Tests Required

- Blower door ≤3 ACH50.

- Duct leakage test.

- CFIS airflow test.

- CO alarms installed.

-------------------------------------------------------

Modular Manufacturer Instructions

1. Envelope & Air Sealing

- Insulation Grade I: Ceiling R-38; Walls R-20 or R-13+R-3; Floors R-19.

- Continuous air barrier per factory drawings.

- All sheathing seams taped; penetrations sealed.

2. Windows & Doors

- U-factor ≤0.30; SHGC ≤0.25.

- NFRC labels remain on units.

- Factory-integrated flashing where applicable.

3. HVAC & CFIS Interface

- Install ECM blower air handler.

- Provide sealed return plenum with 6" fresh-air duct tap.

- Provide filter rack for 4" MERV 11–13 media filter upstream of coil.

- Maintain coil + filter access.

- Pre-wire for CFIS controller.

4. Radon Coordination

- Show chase path in drawings if applicable.

5. Low-VOC Materials

- Low-VOC paints/adhesives/sealants.

- CARB2/TSCA Title VI composite woods.

- CRI Green Label Plus carpet/pad.

6. Documents to Ship

- Window/NFRC list.

- AHRI heat pump certificate.

- Filter specs.

- VOC compliance sheets.

- Factory QA checklist.

EPA ENERGY STAR® for Homes

1️⃣ Purpose & Scope

ENERGY STAR® certified homes deliver improved efficiency, comfort, and durability.

This exhibit outlines all design, construction, and verification requirements for ENERGY STAR v3.2 certification.

2️⃣ Program Structure

- HVAC Design Checklist

- HVAC Installation Checklist

- Rater Field Checklist

3️⃣ Envelope Requirements

Insulation:

- Grade I installation

- R-38 attic min (R-49 pref)

- R-20 walls or R-13 + R-5

Windows:

- U ≤0.30 / SHGC ≤0.25

Air Sealing:

- ≤3.0 ACH50 required

4️⃣ HVAC Design Requirements

Manual J: loads, window data, infiltration

Manual S: AHRI-match, sizing ±15%

Manual D: ≤0.36 in. w.c. ESP

5️⃣ HVAC Installation Requirements

- ECM blower

- Refrigerant charge verified

- Duct leakage ≤4 CFM25/100 ft²

- Line set insulation ≥3/8 in

6️⃣ Mechanical Ventilation (ASHRAE 62.2)

Formula: 0.03 × floor area + 7.5 × (bedrooms + 1)

Systems: CFIS, ERV, HRV

7️⃣ Water Management

- WRB shingle-style

- Pan flashing & kickouts

- Downspouts ≥5 ft

8️⃣ Hot Water Efficiency

- UEF ≥0.90

- Piping R-3 insulation

- Compact plumbing encouraged

9️⃣ Performance Testing

- Blower door ≤3.0 ACH50

- Duct leakage test

- Ventilation airflow

- Static pressure measurement

🔟 Documentation Requirements

- Manuals J/S/D

- AHRI certificate

- NFRC list

- Photo documentation

1️⃣1️⃣ Builder Summary

Envelope: R-49 pref, U ≤0.30

HVAC: ECM, ≤4 CFM25

Ventilation: ASHRAE 62.2

1️⃣2️⃣ Modular Manufacturer Instructions

- Grade I insulation

- NFRC labels attached

- Fresh-air duct tap installed

- Include QA + AHRI docs

1️⃣3️⃣ Thermal Enclosure Checklist

- Aligned air barrier

- Knee wall backing

- Attic baffles all bays

- Sealed chases & soffits

1️⃣4️⃣ HVAC Commissioning

- Cooling airflow CFM/ton

- Static pressure test

- Fan watt draw

- TXV/EEV confirm

1️⃣5️⃣ Thermostat & Controls

- Smart/programmable

- Heat pump backup lockout

- Stage indicator required

1️⃣6️⃣ Lighting & Appliances

- 90% ENERGY STAR lighting

- ENERGY STAR refrigerator/dishwasher

- Bath fans ≤3.0 sones

1️⃣7️⃣ Fan & Range Hood Requirements

- Continuous fans ≤1.0 sone

- Range hoods vent outdoors

- Independent controls

1️⃣8️⃣ Electric-Ready Requirements

- EV charger outlet

- 240V dryer

- Solar conduit

- HPWH circuit

1️⃣9️⃣ Mechanical Room Requirements

- Service clearances

- Tool-free filter access

- Proper return grille sizing

2️⃣0️⃣ QA Documentation Requirements

- Signed HVAC Design/Install/Rater checklists

- HERS certificate

- ENERGY STAR certificate

- Photo documentation

Builder — ENERGY STAR Field Completion Checklist

Module Integration:

- Seal all module seams with foam + air barrier tape.

- Complete insulation at all marriage wall cavities.

- Restore continuous air barrier across ceiling, wall, floor planes.

WRB & Flashing Integration:

- Install WRB shingle-style across module seams.

- Tape all sheathing joints.

- Install pan, side, and head flashing at all windows/doors.

Attic & Roof Integration:

- Add attic baffles at all rafter bays AND module joints.

- Confirm attic ventilation continuity.

Duct & Mechanical Completion:

- Seal all field duct connections with mastic.

- Re-insulate any damaged ducts.

- Confirm filter access is tool-free.

- Install exterior fresh-air hood and connect CFIS duct.

Foundation & Rim Joist:

- Seal slab-to-wall transitions.

- Install sill seal and rim joist sealing.

Site Drainage:

- Confirm downspouts direct water ≥5 ft from foundation.

Manufacturer — ENERGY STAR Factory Requirements Checklist

Factory Air Barrier:

- Provide documented air barrier locations and materials.

- Seal behind tubs, showers, and stair walls.

- Seal all plumbing, electrical, mechanical penetrations pre-drywall.

Factory Ductwork (If Applicable):

- Conduct optional pre-transport duct leakage test.

- Label all duct connection points for set crew.

Marriage Wall Preparation:

- Install insulation where accessible.

- Provide diagram identifying areas requiring site-installed insulation.

HVAC Integration:

- Ensure return plenum sizing meets Manual D.

- Confirm ECM blower accessibility.

- Provide coil, drain pan, and platform details.

Window & Door Integration:

- Install windows to factory spec.

- Leave NFRC labels attached.

- Provide water management notes for builder.

Documentation Shipped with Modules:

- NFRC window list

- AHRI certificate

- Factory insulation QA sheet

- Air barrier notes and diagrams

- Mechanical integration sheet

Zero Energy Ready Home (ZERH) 

Full Technical Specification Packet

Domus Serenitas · Greenville, South Carolina (Climate Zone 3A)

1️ Purpose & Scope

ZERH represents the highest federal performance tier. This packet defines all builder, manufacturer, HVAC, plumbing, and rater requirements for achieving certification in CZ 3A.

2️ Program Structure — Requirements Stack

ZERH requires full compliance with: ENERGY STAR v3.2; Indoor airPLUS; WaterSense (if provided); Solar-ready; Electric-ready; ZERH Additional Specs; HERS Rating ≤55 (target ≤50).

3️ Thermal Envelope Requirements (CZ 3A)

Attic R‑49; Walls R‑20 or R‑13 + R‑5 CI; Floors R‑19; Slab R‑5 (2 ft vertical). Windows: U ≤ 0.30, SHGC ≤ 0.25. Blower door: ≤3.0 ACH50 (target 2.0).

4️ HVAC Requirements

Heat pump ≥15.2 SEER2 / 8.1 HSPF2. ECM blower motor. AHRI-matched. Manual J/S/D required. Duct leakage ≤4 CFM25/100 ft²; ducts inside conditioned space preferred.

5️ Mechanical Ventilation (Fresh Air)

Acceptable systems: ERV, HRV, CFIS. Must meet ASHRAE 62.2 airflow. Dedicated controls required. Measured airflow verification mandatory.

6️ Hot Water Efficiency Requirements

≤0.5 gallons wasted to 120°F. Compact/structured layout. Hot water piping insulated to R‑3. Demand-controlled recirculation allowed.

7️ Solar-Ready Requirements

≥300 ft² obstruction-free roof (south/SW). Conduit attic→panel. Roof designed for +4 psf PV load. Reserve breaker space. PV-ready label locations required.

8️ Electric-Ready Requirements

240V EV charger. 240V dryer outlet. HPWH-ready circuit. Smart panel/labeled breakers recommended.

9️ Lighting & Appliances

100% high-efficacy lighting. ENERGY STAR appliances (if installed). Bath fans ≤1.0 sone.

10 Indoor AirPLUS (Required)

Full Indoor airPLUS compliance: moisture management, pest barriers, radon-ready, low-VOC, CFIS/ERV/HRV, MERV 11–13 filter, commissioning.

1️1 Water Efficiency (Optional)

WaterSense irrigation controller, drip irrigation, native plants, indoor fixtures already above code.

1️2 Builder Responsibilities

Install Grade I insulation, continuous air barrier, ducts in conditioned space, solar-ready & electric-ready rough-ins, ERV/HRV or CFIS, ≤3.0 ACH50, module seam sealing.

1️3 Modular Manufacturer Responsibilities

Factory-installed Grade I insulation, compliant windows, air-barrier continuity, ECM air handler, MERV 11–13 filter rack, fresh-air tap, internal R‑3 hot water piping.

1️4 Rater Requirements

Blower door, duct test, ventilation airflow, hot water delivery, solar-ready, electric-ready, Indoor airPLUS, ENERGY STAR checklist, final HERS rating.

1️5 Required Documentation

Builder: HVAC J/S/D, plumbing layout, solar plan, electrical-ready docs. Manufacturer: QA checklist, NFRC list, insulation docs. Rater: ZERH forms, test results.

SECTION A — Builder Technical Specifications (FULL DETAILS)

A1. Solar-Ready Construction Drawings

- Conduit: 1.25" min, metal or Sch. 40 PVC.

- Route: attic → mechanical room → panel; avoid bends > 360° total.

- PV-ready junction box: attic, accessible, labeled.

- Roof truss engineering: +4 psf dead load in PV zone.

- Solar zone diagram: dimensioned ≥300 ft² unobstructed area.

- Required labels: “PV Ready – Conduit,” “PV Interconnect Space Reserved.”

A2. Mechanical Ventilation Installation Details

- ERV/HRV supply to main living spaces; stale air pickup from baths/laundry.

- Outdoor air intake: ≥10 ft from exhausts; ≥2 ft above grade; ¼" mesh.

- CFIS: intake → filter → return plenum downstream of coil.

- Ventilation controller presets and scheduling documentation.

- ECM blower static compensation allowed; external static ≤0.36 in. w.c.

A3. Hot Water Distribution — Layout Specifications

- Max branch line: ≤8–10 ft typical.

- Max trunk line: ≤30–40 ft recommended.

- Home-run PEX: ⅜" or ½" to baths/kitchen where feasible.

- Water heater location: centrally located (≤20–30 ft to majority fixtures).

- Recirc pump: demand-control only (button/motion sensor); NO continuous timers.

A4. Air Barrier & Insulation Installation

- Sheathing seams fully taped; top plates sealed; rim joists foamed.

- Module seams (if any): gasket + foam + air-barrier tape.

- Attic insulation: baffles at all eaves; depth markers; R‑49 blown.

A5. Duct Installation Standards

- All joints sealed with mastic or UL‑181A/B tape.

- Ducts in conditioned space unless trade constraints; if not, R‑8 minimum.

SECTION B — Modular Manufacturer Technical Specifications

B1. Air Barrier Continuity (Module-to-Module)

- Marriage wall: continuous air barrier via taped sheathing or membrane.

- Rim joist: factory-installed foam + site-applied closure foam.

- Ceiling plane air barrier: maintain continuity at module seams.

B2. HVAC Factory Integration

- ECM blower air handler installed with sealed return plenum.

- Fresh-air duct tap: 6" connection with balancing damper.

- Filter rack: 4" MERV 11–13 factory-installed; access panel required.

- Refrigerant line insulation: ≥⅜" thickness.

B3. Duct Bridging Across Modules

- Crossover ducts: sealed with mastic, insulated R‑8+, tested at site.

- Duct alignment: pre-marked factory stubs for installer.

B4. Plumbing Requirements

- All hot water lines insulated R‑3 inside module.

- Manifold location set for compact layout; branches labeled for site.

B5. Required Factory Documentation

- Factory QA insulation checklist.

- NFRC window inventory.

- Mechanical equipment AHRI certificate.

- Air barrier photo log (optional but recommended).

SECTION C — Ventilation Schematics (Builder + Manufacturer)

Include the following diagrams in construction documents:

- ERV/HRV airflow diagram (supply/exhaust, stale air locations).

- CFIS airflow path (intake → filter → return → blower).

- Outdoor air intake placement diagram.

- Ventilation controller wiring schematic.

SECTION D — Hot Water Layout Diagrams

Required for compliance and rater testing:

- Trunk/branch schematic with lengths.

- Manifold layout (if used) with loop distances.

- Water heater location diagram showing central placement.

- Recirc loop schematic (only if installed).

Home Energy Rating System (HERS) – Technical Specification Packet

Domus Serenitas · Greenville, South Carolina (CZ 3A)
For Builder, Modular Manufacturer, HVAC Contractor & Rater

1️⃣ Purpose & Scope

The Home Energy Rating System (HERS Index) measures a home’s energy performance compared to a standard new home.
This packet provides all design requirements, installation standards, test procedures, and documentation needed to achieve a low HERS Index Score (≤55; preferred ≤50) aligned with ENERGY STAR and Zero Energy Ready Home (ZERH).

2️⃣ Energy Modeling Inputs (Design Stage Requirements)

These inputs must be confirmed and provided to the RESNET rater before construction.

2.1 Architectural Inputs

• Conditioned floor area (sq ft)
  
  

• Ceiling heights (per level)
  
  

• Building orientation (north arrow)
  
  

• Roof type & color (solar heat gain impact)
  
  

• Foundation type (slab / crawl / basement)
  
  

2.2 Window & Door Specifications

• Window U-Factor
  
  

• SHGC
  
  

• Frame type (vinyl / fiberglass / composite)
  
  

• Exterior door U-Factor
  
  

• NFRC label copies required
  
  

2.3 Insulation Specifications

• Ceiling R-value
  
  

• Wall R-value (cavity + continuous)
  
  

• Floor R-value
  
  

• Insulation material type
  
  

• Air barrier materials & continuity plan
  
  

2.4 Mechanical System Inputs

• Heat pump model & efficiencies (SEER2 / HSPF2)
  
  

• Furnace AFUE (if used)
  
  

• Water heater type + UEF
  
  

• Ventilation system type (CFIS / ERV / HRV)
  
  

• Thermostat type (programmable / smart)
  
  

2.5 Duct Information

• Duct location (attic, crawl, conditioned space, chase)
  
  

• Duct insulation R-value
  
  

• Leakage target (≤4 CFM25/100 sq ft)
  
  

3️⃣ Building Envelope Requirements

3.1 Insulation (Grade I Required)

• Attic: R-38 minimum; R-49 preferred
  
  

• Walls: R-20 OR R-13 + R-5 continuous
  
  

• Floors: R-19
  
  

• Rim joists fully insulated + sealed
  
  

• No voids, compression, or misalignment
  
  

3.2 Air Barrier Continuity

• Tape exterior sheathing seams
  
  

• Continuous air barrier behind tubs, showers, stair walls
  
  

• Seal all top/bottom plates
  
  

• Seal drywall–subfloor seams
  
  

• Gasket or seal attic access
  
  

3.3 Windows & Doors

• Windows: U ≤ 0.30; SHGC ≤ 0.25
  
  

• Exterior doors insulated / energy rated
  
  

• NFRC labels must remain until rater documents them
  
  

4️⃣ Air Sealing Performance (Blower Door Requirement)

• Required: ≤3.0 ACH50
  
  

• ENERGY STAR / ZERH target: ≤2.5 ACH50
  
  

• High-performance goal: ≤2.0 ACH50
  
  

Critical leakage points to address:

• Rim joists
  
  

• Plumbing + mechanical penetrations
  
  

• Top plate seams
  
  

• Attic knee walls
  
  

• Fireplace chase
  
  

• Electrical panel penetrations
  
  

• Bottom plate-to-slab transitions
  
  

5️⃣ HVAC Design Requirements (Manual J / S / D)

5.1 Manual J (Load Calculations)

• Room-by-room design
  
  

• Correct infiltration assumptions
  
  

• Accurate design temperatures
  
  

• Use actual NFRC values
  
  

5.2 Manual S (Equipment Selection)

• Equipment sized within ±15% of Manual J
  
  

• No oversizing
  
  

• Heat pumps preferred for HERS performance
  
  

5.3 Manual D (Duct Design)

• Ducts sized to support ≤0.36 in. w.c. ESP
  
  

• Return air pathways for all enclosed rooms
  
  

• Proper register sizing per room
  
  

5.4 Equipment Efficiency Minimums

• Heat pump: ≥15.2 SEER2 & ≥8.1 HSPF2
  
  

• Furnace (if applicable): 95%+ AFUE
  
  

• ECM blower required
  
  

• AHRI certificate required
  
  

6️⃣ Ductwork Requirements

6.1 Leakage Limits

• ≤4 CFM25 per 100 sq ft of conditioned floor area
  
  

• Verified by duct blaster test
  
  

6.2 Duct Location

• Preferred: Entirely inside conditioned space
  
  

• Acceptable: Factory-made chase for modular homes
  
  

• Worst-case: Attic/crawl (must enhance sealing and insulation)
  
  

6.3 Sealing & Insulation

• Mastic-seal all joints
  
  

• UL-181 tape only as accessory
  
  

• Supply ducts: R-6 minimum; R-8 preferred
  
  

• Minimize return leakage
  
  

7️⃣ Mechanical Ventilation (ASHRAE 62.2)

7.1 Required Airflow

Formula:
0.03 × floor area + 7.5 × (bedrooms + 1)

7.2 System Options

• CFIS (Central-Fan Integrated Supply)
  
  

• ERV
  
  

• HRV
  
  

7.3 Verification

• Airflow measured with flow hood or duct traverse
  
  

• Outdoor air intake documented
  
  

• Controller settings documented
  
  

8️⃣ Hot Water System Efficiency

8.1 Water Heater

• UEF ≥0.90 (heat pump water heater preferred)
  
  

8.2 Hot Water Distribution

• Hot water lines insulated to R-3
  
  

• Structured plumbing / manifold system recommended
  
  

• Max 60-ft trunk line preferred
  
  

8.3 Circulation

• Demand-controlled recirculation allowed
  
  

• Timer-based systems discouraged
  
  

9️⃣ Solar-Ready Requirements (Optional but Improves HERS)

• South/SW roof area ≥300 sq ft
  
  

• Conduit from attic to main panel
  
  

• Roof designed for additional PV load
  
  

• Solar area kept free of obstructions
  
  

• Dedicated solar breaker space
  
  

🔟 Required Performance Tests

10.1 Mandatory

• Blower door (ACH50)
  
  

• Duct leakage test (CFM25)
  
  

• Mechanical ventilation airflow
  
  

• Refrigerant charge verification
  
  

• Thermostat setup verification
  
  

10.2 Additional Recommended

• Thermal imaging
  
  

• Static pressure test
  
  

• Fan watt draw
  
  

• Zonal pressure diagnostics
  
  

1️⃣1️⃣ Documentation Required for HERS Rating

11.1 Architectural & Envelope Docs

• Floor plans + elevations
  
  

• North arrow
  
  

• Window schedule (U/SHGC)
  
  

• Insulation R-values + air barrier details
  
  

• Factory QA insulation checklist (modular)
  
  

11.2 Mechanical & Ventilation Docs

• Manual J, S, D
  
  

• AHRI certificate
  
  

• Ventilation model info
  
  

• CFIS/ERV/HRV airflow verification form
  
  

11.3 Performance Tests

• Blower door
  
  

• Duct blaster
  
  

• Ventilation airflow
  
  

• Refrigerant charge
  
  

• Water heater UEF
  
  

11.4 Photo Documentation

• Air barrier before insulation
  
  

• Insulation installation (pre-drywall)
  
  

• Duct sealing
  
  

• Mechanical room
  
  

• Window NFRC labels
  
  

• Modular factory seam sealing
  
  

1️⃣2️⃣ BUILDER SUMMARY (Field Guide)

Envelope

• R-49 attic preferred; R-20 walls; R-19 floors
  
  

• Windows: U ≤ 0.30 / SHGC ≤ 0.25
  
  

• Blower door ≤ 3.0 ACH50 (target 2.5)
  
  

HVAC & Ducts

• Install per Manual J/S/D
  
  

• ECM blower
  
  

• Duct leakage ≤4 CFM25/100 sq ft
  
  

• Keep ducts inside conditioned space
  
  

Ventilation

• ASHRAE 62.2 compliant
  
  

• Verify CFIS/ERV/HRV airflow
  
  

• Avoid blocking intakes and returns
  
  

Hot Water

• UEF ≥0.90
  
  

• Insulate all hot water lines
  
  

• Use short, efficient distribution paths
  
  

Tests Required

• Blower door
  
  

• Duct leakage
  
  

• Ventilation airflow
  
  

• Refrigerant charge
  
  

1️⃣3️⃣ MODULAR MANUFACTURER INSTRUCTIONS

Envelope & Air Sealing

• Install Grade I insulation (R-38 ceiling, R-20 walls, R-19 floors)
  
  

• Taped sheathing seams
  
  

• Continuous air barrier
  
  

• Insulate/seal rim joists
  
  

Windows & Doors

• Install windows U ≤ 0.30 / SHGC ≤ 0.25
  
  

• Leave NFRC labels on units
  
  

• Pre-integrate factory flashing where possible
  
  

Mechanical Integration

• Install ECM blower air handler
  
  

• Provide sealed return plenum
  
  

• Provide 6" fresh-air duct tap location
  
  

• Install 4" MERV 11–13 filter rack upstream of coil
  
  

• Maintain service access for coil + filter
  
  

• Pre-wire ventilation controller
  
  

Plumbing Integration

• Insulate all hot water lines (R-3)
  
  

• Provide compact plumbing layout where feasible
  
  

Documentation to Ship

• Window/NFRC list
  
  

• AHRI certificate
  
  

• Factory insulation QA
  
  

• Mechanical equipment data sheets