Rating Standards & Compliance Flashcards

Under RESNET standards, what is the maximum allowable HERS Index for a home to qualify as a 'Zero Energy Ready Home'?

Answer: 45

DOE Zero Energy Ready Homes require a HERS Index of 45 or below before renewable energy systems are credited.

Which ANSI/RESNET standard specifically governs the calculation methodology for energy ratings of single-family and low-rise multifamily buildings?

Answer: ANSI/RESNET/ICC 301

ANSI/RESNET/ICC 301 establishes the calculation methodology and reference home used for HERS ratings.

A HERS rater is required to conduct a 'confirmed rating' instead of a 'projected rating' when:

Answer: All construction is complete and verified through field inspections

A confirmed (final) rating requires completed construction with all inspections and testing verified on-site by the rater.

What is the RESNET-required minimum sampling frequency for a rater performing ratings under the Provider sampling protocol?

Answer: At least 1 in 7 homes in a subdivision or development

RESNET's sampling protocol requires a minimum of 1 in 7 homes to receive full diagnostic testing within a defined sample group.

Which of the following items is NOT required to be included in a HERS rating file submitted to a RESNET Provider?

Answer: Homeowner occupancy data

Occupancy data is not part of the energy rating inputs; HERS ratings are based on standardized assumptions for occupancy.

Under RESNET standards, what recourse does a homebuyer have if they believe a HERS rating was performed incorrectly?

Answer: File a complaint with the rater's RESNET-accredited Rating Provider

Complaints about rating quality must first be directed to the RESNET-accredited Rating Provider that employs or oversees the rater.

In HERS rating methodology, the 'rated home' is compared against a 'reference home' that is defined as:

Answer: A home of identical geometry and orientation using RESNET-specified standard features

The HERS reference home mirrors the rated home's size and geometry but uses code-minimum features as defined in ANSI/RESNET/ICC 301.

When performing duct leakage testing for a HERS rating, which metric represents total duct leakage to outside the conditioned space?

Answer: Duct leakage to outside (CFM25 out)

CFM25 out (duct leakage to outside) measures air escaping the duct system into unconditioned spaces, which directly affects HERS scoring.

A RESNET-certified rater discovers mid-inspection that insulation has been installed at a lower R-value than specified. What is the correct action?

Answer: Document the discrepancy, rate using the as-built value, and notify the Provider

Raters must document and use as-built conditions in the rating; discrepancies must be reported to the Rating Provider per RESNET quality assurance requirements.

Which RESNET standard addresses measurement of airtightness and ventilation airflows in residential buildings?

Answer: ANSI/RESNET/ICC 380

ANSI/RESNET/ICC 380 establishes standard test methods for airtightness and mechanical ventilation airflow measurement.

For a home rated under ENERGY STAR Certified Homes Version 3.2, what additional requirement beyond HERS Index applies?

Answer: All mandatory requirements in the ENERGY STAR checklist must be verified

ENERGY STAR requires both HERS Index compliance AND verification of all mandatory thermal enclosure, HVAC, and water management checklist items.

Under RESNET's quality assurance oversight, what percentage of a rater's confirmed ratings must be reviewed by the Rating Provider annually?

Answer: 10%

RESNET requires Rating Providers to conduct quality assurance reviews on a minimum of 10% of each rater's confirmed ratings annually.

Which condition allows a rater to use the 'worst-case' duct leakage value from a prior test on a repeated floor plan?

Answer: Sampling protocol approval from the Rating Provider

RESNET's sampling protocol, when approved by the Provider, allows repeated identical floor plans to use test results from a sampled representative unit.

The HERS Index scale is defined such that a score of 0 represents:

Answer: A home that produces as much energy as it consumes on an annual basis (net-zero)

A HERS Index of 0 represents a net-zero energy home that produces as much energy annually as it consumes.

A home in Climate Zone 5 has a confirmed HERS Index of 62. Under 2021 IECC, this home most likely:

Answer: Complies, as the 2021 IECC path allows HERS-based compliance at that threshold

The 2021 IECC ERI compliance path sets zone-specific thresholds; Climate Zone 5 allows ERI scores up to 62 for code compliance without renewable credit.

What is the purpose of the 'projected rating' in the HERS process?

Answer: To estimate a home's energy performance before construction is complete for design feedback

A projected rating is a pre-construction or mid-construction estimate used for design guidance and preliminary compliance documentation.

Under RESNET standards, which party is ultimately responsible for the accuracy of a HERS rating?

Answer: The RESNET-accredited Rating Provider

RESNET places ultimate responsibility for rating accuracy on the accredited Rating Provider, which must oversee and quality-assure each rater's work.

A rater finds that a home's mechanical ventilation system is not operating. How should this be handled for the confirmed HERS rating?

Answer: Rate the home using as-built conditions and flag the deficiency to the Provider

Raters must document as-built conditions accurately; a non-operational required system is a deficiency that must be flagged to the Provider.

Which software tool is commonly used by HERS raters to calculate energy ratings and must be accredited by RESNET?

Answer: REM/Rate or equivalent RESNET-accredited software

HERS ratings must be calculated using RESNET-accredited rating software such as REM/Rate, EnergyGauge, or other approved tools.

When a HERS rater identifies a home built without a required vapor retarder in Climate Zone 6, the correct response is to:

Answer: Document the missing component using as-built conditions and report to the Provider

Raters must model as-built conditions and report deficiencies; they cannot grant credits for uninstalled components or withhold ratings unilaterally.