A HERS score can be used for which of the following?
A) LEED for Homes
B) Energy Eflcient Mortgages D) All of the above
C) National Association of Home Builders
D) All of the above
1. Rating report
Raters provide what to the builder (3 things) 2. Conflict of interest disclosure form
3. consumer complaint process
Number of climate zones in the US 8
DelMarVa in which climate zone 4
1. Energy Star
3 main programs that use the HERS index 2. Challenge Home
3. HUD's programs
total number of degrees colder than base temperature
(HDD65) during the "heating season"
Heating Degree Days Ex) if temp for 1 hr is 55, then 65-55 = 10 heating degree
days for that 1 hr
Ex2) next hour temp drops to 48 then 65-48 = 17 HDD for
that hour and over that 2 hours we "picked up" 27 HDD
Usual base temp for Cooling degree days 50 (CDD50)
Used to estimate amount of energy needed to cool (CDD)
What are CDD and HDD used for? or heat (HDD) a homes during the cooling (CDD) or heat-
ing (HDD season)
The Reference Home is where on the HERS Index 100
4 steps of calculating the HERS index
, 1. purchased energy fraction (PEF = (total E use - onsite
power production) / (total E use)
2. (rated home heating x cooling x DWH x lights x ap-
pliance MBtu's)/(reference home h. x c. x DWH x L. x
appliance MBtu's)
3. ^result is multiplied by PEF
4. ^result is multiplied by 100
1. projected rating (no certs rewarded)
2. confirmed rating (used for certificated)
3 types of ratings 3. sampled rating (sampling) (not for certifying any in-
dividual home) (method for shortcutting energy verifica-
tion for large production projects) (generally not ideal
process)
QA: ensures best practice was followed
QA (quality assurance) vs. QC (quality control)
QC: ensures that the product was installed correctly and
performs as intended
Equipment gauges must be calibrated every Year
Q represents what? Heat flow (in Btu/hr)
Overhang measurements are important to Determine the window shading
Which view shows insulation level and installation Sectional view
Heating, cooling, water heating, lighting, appliances (How
HERS Index is based on these end uses
Come WHales Like Anchovies... memory tool)
The buyer / owner to include the cost of energy eflciency
An Energy Improvment Morgage Allows:
improvements in the mortgage