HERS HERS HVAC Systems and Equipment Evaluation

Question 1

What AFUE rating is the minimum threshold for a gas furnace to be considered high-efficiency under current U.S. energy standards?

Accepted Answer

90%

Answer

78%

Answer

80%

Answer

95%

Question 2

Which metric is used to rate the cooling efficiency of central air conditioning systems on the HERS rating?

Accepted Answer

SEER

Answer

EER

Answer

COP

Answer

HSPF

Question 3

When a HERS rater verifies equipment sizing, which method is the industry-accepted standard for performing residential load calculations?

Accepted Answer

ACCA Manual J

Answer

ASHRAE 90.1

Answer

RESNET Chapter 3

Answer

IECC Table R403

Question 4

What is the minimum HSPF rating required for an air-source heat pump to qualify as high-efficiency?

Accepted Answer

8.2

Answer

6.8

Answer

7.7

Answer

10.0

Question 5

In REM/Rate energy modeling, how is a heat pump water heater typically entered to reflect its efficiency correctly?

Accepted Answer

Using the Uniform Energy Factor (UEF) from the EnergyGuide label

Answer

As a standard electric resistance unit with adjusted EF

Answer

As a solar thermal unit with backup

Answer

Using the COP at 67°F ambient test conditions only

Question 6

Which ventilation strategy meets ASHRAE 62.2 requirements by continuously exhausting stale air from bathrooms or kitchens at a calculated whole-house rate?

Accepted Answer

Exhaust-only ventilation

Answer

Supply-only ventilation

Answer

Balanced ERV ventilation

Answer

Spot ventilation only