Building Science Energy Cods
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The North Carolina 2012 code is based on which IECC?
How many stories is is considered residential?
3 stories or less
What type of structure is exempt from the Residential Code?
When are historic buildings not exempt from Residential code?
- Rennovations that expose areas with no insulation
3 pathways to compliance under Residential Code 2012?
- Software Tradeoffs
- Performance (computer modeling)
Who is certified to sign off on a Perfomance pathway to compliance?
Architects and Engineers
What is the required SHGC for climate zones 3,4 and 5?
3 and 4 - .3
5- SHGC is not required because of cold climate
Interior design conditions (temps) for heating and cooling
Heating: Maximum of 72
Cooling: Minimum of 75
What is the software that Hers raters use?
What organization provides ResCheck?
What are the U-factors maximums for windows for windows in all three climate zones?
What is the SHGC Maximum for windows in Climate zones 3 and 4
What is the 2012 Energy Code requirement for residential lighting (in terms of % of High EFFICACY!)
75% High EFFICACY
Why is there no SHGC requirment in climate zone 5?
What are 2 requirements for heat pump controls?
- Prevent supplemental heat operation
- Heat strip outdoor temp lockout
What are two options for compliance with air leakage requirments (Think how you get cfm50 and ach50!)
- Blower door test .3cfm50/ft2 or 5 ach50
- Visual Inspection
What is the Energy code insulation requirment for vertical attic access? (u need this around you car windows and R-____)
- Insulated to R-5
What type of recessed lighting is required when installation is betweeen the conditioned and unconditioned space?
Air sealed ICAT
In terms of exterior wall insulation if the code states 13+2.5 what does that mean?
- 13 cavity
- 2.5 insulated sheating
In terms of mass walls if insulation requirment states 5/10 what does that mean?
- Inside insulation R-5
- Exterior R-10
For air leakage allowances in residential construction what is maximum CFm50/ft2 allowed? ( same as SHGC for windows climate 3 and 4)
When are duct systems not required to be leak tested?
located inside the building thermal envelope
Installation of a partial system as a replacement
What is the maximum allowable duck leakage requirement in 2012 Energy Code
6 cfm/100 ft2
What are two materials that can be used to seal ducts?
Horizontal Attic hatches must be insulated with?
Vertical attic hatches are insulated with?
Drop Down Hatches are required to be insulated with?
Where can you find insulation certifications within a home?
Required Duct insulation unconditioned?
Required duct insulation conditioned space?
All circulation service hot water piping should be ____ insulation?
5 ways to make a hot water heater more efficient?
- Inside thermal envelope
- low flow fixtures
- near most used fixtures
- tank blanket
What defines a wall as being below grade?
when 1/2 of wall is below the grade
Insulation enclosures that must get insulated but are often over looked?
- attic kneewalls
The areas that must comply to 2012 Energy code are those that are (heating) ___ degF or higher and _____degF or lower (cooling)
RESCheck allows you to do what?
When may it not?
- Trade-off between components
- Envelope requirments
- SHGC can trade-off up to .4 SHGC
Common R-Values (per inch)
- Concrete- .2
- 1/2" drywall- .5
- Double-paned glass- 1.8
- Low-e glass- 3
- Fiberglass- 3-4
- Cellulose- 3.7
- Expanded Poly- 4
- Extruded Poly- 5
- Icynene- 3.6-3.7
- Polyurethane Foam- 6.7-7
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