Or. Admin. R. 918-440-0030

Current through Register Vol. 63, No. 8, August 1, 2024

Section 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.

Or. Admin. R. 918-440-0030

DC 16-1978, f. 4-28-78, ef. 7-1-78; Renumbered from 814-027-0105; BCD 3-2010, f. 5-14-10, cert. ef. 7-1-10; BCD 5-2011, f. & cert. ef. 3-11-11; BCD 22-2011, f. 7-26-11, cert. ef. 10-1-11

Stat. Auth.: ORS 469.700

Stats. Implemented: ORS 469.700