BPI Energy Auditing 2

Question 1

What does a blower door test measure in a residential energy audit?

Accepted Answer

Air leakage rate of the building envelope

Answer

A blower door test depressurizes the home to measure air infiltration through the building envelope in CFM50 or ACH50.

Question 2

Which BPI standard unit is used to express overall building air leakage from a blower door test?

Accepted Answer

CFM50

Answer

CFM50 (cubic feet per minute at 50 Pascals of depressurization) is the standard BPI unit for reporting whole-building air leakage.

Question 3

During a combustion safety test, what is the maximum acceptable CO level in undiluted flue gases from a natural draft furnace per BPI standards?

Accepted Answer

400 ppm

Answer

BPI standards require that CO in undiluted flue gases not exceed 400 ppm for natural draft appliances.

Question 4

What is the purpose of a duct blaster test in an energy audit?

Accepted Answer

Determine duct system air leakage to the outside

Answer

A duct blaster pressurizes the duct system to quantify leakage, particularly leakage to unconditioned spaces.

Question 5

An energy auditor finds a draft hood equipped water heater failing the worst-case CAZ depressurization test. What is the appropriate immediate action?

Accepted Answer

Red-tag the appliance and notify the homeowner

Answer

A failed worst-case depressurization test indicates a spillage/backdrafting hazard; the auditor must red-tag the appliance and inform the occupant.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Energy Auditing 2