Energy Efficiency and Weatherization Standards Flashcards

Under HUD's Green and Resilient Retrofit Program (GRRP), what is the primary goal of energy retrofit funding for assisted housing?

Answer: Reduce energy and water consumption while improving climate resilience

GRRP provides funding to reduce energy and water consumption in HUD-assisted multifamily housing while improving resilience to climate-related risks.

What does the term 'thermal bridging' refer to in the context of building energy performance?

Answer: Heat transfer through a material with higher conductivity that bypasses insulation

Thermal bridging occurs when a conductive material (such as a metal stud or concrete floor slab) provides a path for heat flow that bypasses the insulation layer.

An HUD inspector finds a gas water heater with a first-hour rating of 60 gallons serving a 4-bedroom unit. What is the inspector most likely to flag?

Answer: The water heater may be undersized for the household's peak demand

A 4-bedroom household typically requires a first-hour rating of at least 80 gallons; a 60-gallon first-hour rating may be undersized for peak demand.

Which type of ventilation system is considered most energy-efficient for providing whole-house mechanical ventilation in tight HUD-assisted homes?

Answer: Balanced heat recovery ventilator (HRV) or energy recovery ventilator (ERV)

HRV/ERV systems recover heat (or heat and moisture) from outgoing exhaust air and transfer it to incoming fresh air, maintaining indoor air quality with minimal energy penalty.

What minimum wall insulation R-value does HUD typically require for new construction in Climate Zone 5 (northern states)?

Answer: R-20 continuous or R-13 + R-5 continuous

IECC and HUD standards for Climate Zone 5 typically require R-20 continuous insulation or R-13 cavity plus R-5 continuous insulation for above-grade walls.

During a weatherization inspection, a HUD inspector identifies combustion appliances in a tight, well-sealed home. What is the primary safety concern?

Answer: Carbon monoxide backdrafting due to insufficient combustion air

In a tight home, combustion appliances may lack sufficient makeup air, causing negative pressure that can backdraft flue gases including carbon monoxide into the living space.

What is the purpose of a 'duct blaster' test performed during a HUD energy inspection?

Answer: To quantify air leakage from the HVAC distribution system

A duct blaster (or duct pressurization test) pressurizes the duct system to measure how much air is leaking from joints, seams, and connections.