OAR 918-440-0030
Energy Efficiency Rating (E.E.R.) System Single Family Residences


(1)

Scope: These rules provide a voluntary energy efficiency rating system for single family residences to encourage voluntary energy conservation and the voluntary use in real estate transactions.

(2)

Definitions:

(a)

“E.E.R.” means Energy Efficiency Rating;

(b)

“Single Family Residence” means a structure designed as a residence for one family and sharing no common wall with another residence of any type.

(3)

Energy Efficiency Rating: The Energy Efficiency Rating (E.E.R.) is to be determined by the following steps:

(a)

Determine the total energy used in the residence over the last 12 months’ period in thousands of BTUs:

(A)

Determine electrical energy (KWH) used (source: Electrical bills or utility company). Multiply the total KWH by 3413 BTUs equals the total electric BTUs used. (Electric KWH) x 3413 = BTUs;

(B)

Determine natural gas therms used (source: Gas bills or the gas company). Multiply the therms used by 100,000 then by 0.75 (Efficiency Factor). This equals the total gas BTUs used. (Gas therm) x 100,000 x 0.75 = BTUs;

(C)

Determine heating oil BTU’S by multiplying total gallons by 140,000 then by 0.75 (Efficiency Factor). This equals the total oil BTUs used. (Oil Gallons) x 140,000 x 0.75 = BTUs;

(D)

Total the types of energy BTUs used in the residence to determine total BTUs used in the 12 months. (Electrical BTUs + Gas BTUs = Oil BTUs = TOTAL BTUs.);

(E)

Divide total BTU’S by one thousand equals total thousand’s BTUs used
TOTAL BTUs
1,000
= TOTAL THOUSAND BTUs USED

(b)

Determine the square footage of living (heated) space of the residence. (Source: House plans, measurement, or county assessor.);

(c)

Divide total thousand BTUs used by the square footage of living space. The results are the E.E.R. of the residence that year:
TOTAL THOUSAND BTUs USED
TOTAL SQUARE FEET LIVING SPACE
= E.E.R.

Source: Rule 918-440-0030 — Energy Efficiency Rating (E.E.R.) System Single Family Residences, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=918-440-0030.

Last Updated

Jun. 8, 2021

Rule 918-440-0030’s source at or​.us