HERS Energy Modeling Software 2

Question 1

In REM/Rate, what does the 'as-built' model represent?

Accepted Answer

The home as actually constructed and verified by the rater

Answer

The as-built model in REM/Rate captures the home's actual construction details verified through on-site inspection and testing.

Question 2

Which blower door test result is the primary input for air infiltration in most HERS energy modeling software?

Accepted Answer

ACH50 converted to ACHnatural via the N-factor method

Answer

Most HERS software converts the ACH50 blower door result to ACHnatural using the Lawrence Berkeley National Laboratory N-factor method.

Question 3

What is the purpose of the 'reference home' in HERS Index software calculations?

Accepted Answer

To establish a baseline HERS 100 score against which the rated home is compared

Answer

The RESNET-defined reference home establishes HERS Index 100 and is automatically generated by software based on the rated home's geometry.

Question 4

When entering duct system data in REM/Rate, which parameter most directly affects duct leakage modeling?

Accepted Answer

Duct leakage to outside (CFM25out)

Answer

Duct leakage to outside (CFM25out) directly impacts the energy penalty assigned to the duct system in the energy model.

Question 5

In EnergyGauge USA, what does the 'Loads' output report primarily show?

Accepted Answer

Peak heating and cooling loads for equipment sizing

Answer

The Loads report in EnergyGauge USA displays peak design heating and cooling loads, useful for HVAC equipment sizing verification.

(HERS) Home Energy Rater Certification Practice Test