HERS HVAC Systems and Equipment Evaluation Flashcards
6 cards from real HERS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 HERS HVAC Systems and Equipment Evaluation flashcards as text
What AFUE rating is the minimum threshold for a gas furnace to be considered high-efficiency under current U.S. energy standards?
Answer: 90%
A gas furnace must have an AFUE of 90% or higher to be classified as high-efficiency under U.S. standards.
Which metric is used to rate the cooling efficiency of central air conditioning systems on the HERS rating?
Answer: SEER
SEER (Seasonal Energy Efficiency Ratio) is the primary metric used to evaluate central air conditioner efficiency in HERS ratings.
When a HERS rater verifies equipment sizing, which method is the industry-accepted standard for performing residential load calculations?
Answer: ACCA Manual J
ACCA Manual J is the industry-accepted protocol for calculating residential heating and cooling loads.
What is the minimum HSPF rating required for an air-source heat pump to qualify as high-efficiency?
Answer: 8.2
An HSPF (Heating Seasonal Performance Factor) of 8.2 or higher qualifies an air-source heat pump as high-efficiency.
In REM/Rate energy modeling, how is a heat pump water heater typically entered to reflect its efficiency correctly?
Answer: Using the Uniform Energy Factor (UEF) from the EnergyGuide label
Heat pump water heaters are entered using their Uniform Energy Factor (UEF) as listed on the EnergyGuide label.
Which ventilation strategy meets ASHRAE 62.2 requirements by continuously exhausting stale air from bathrooms or kitchens at a calculated whole-house rate?
Answer: Exhaust-only ventilation
Exhaust-only ventilation can satisfy ASHRAE 62.2 whole-house ventilation requirements by continuously running a bath or kitchen exhaust fan at the required flow rate.