HERS Index and Ratings 3

Question 1

A HERS rater is evaluating an existing home built in 1985. Which type of HERS rating is most appropriate?

Accepted Answer

Confirmed rating with full field verification and testing

Answer

Existing homes require a confirmed rating that includes on-site inspection and diagnostic testing to accurately assess actual energy performance.

Question 2

How does the HERS Index treat on-site renewable energy generation such as solar PV?

Accepted Answer

It reduces the home's energy consumption score, potentially driving the index below 100

Answer

On-site renewable energy offsets the home's consumption, lowering the HERS Index and potentially achieving scores below zero.

Question 3

A home's HERS rating is listed as '52.' Which of the following statements is most accurate?

Accepted Answer

The home uses 48% less energy than the reference home

Answer

A HERS Index of 52 means the home uses 48% less energy than the reference home (which scores 100).

Question 4

Under RESNET standards, which category of energy end use is specifically EXCLUDED from the HERS Index calculation?

Accepted Answer

Plug loads and process loads (in some rating types)

Answer

Plug loads and process loads are excluded from the standard HERS Index calculation, which focuses on regulated energy end uses.

Question 5

What does a HERS 'sampling' protocol allow a rater to do?

Accepted Answer

Test a subset of similar homes in a subdivision and apply results to the group

Answer

The HERS sampling protocol allows raters to test a representative subset of similar homes in a development and apply those results across the group.

(HERS) Certified Home Energy Rating System Rater Practice Test