Standard 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildings Flashcards
Are the categories “nonmetal framed” and “metal frame” for vertical fenestration separate or combined?
The 2019 edition combined them
The 2019 edition allows for a more simplified method for lighting. What building size does this apply to?
Buildings up to 25,000 SF
What types of buildings does 90.1 not apply to?
Low rise (under 3 stories), sing-family homes, mobile homes
Define: Annual fuel utilization efficiency (AFUE)
heat generated vs fuel used, presented as a %. A higher percentage means a higher efficiency
Define: baseline building design
computer representation of a hypothetical design based on the proposed design
Define: best efficiency point (BEP)
the pump hydraulic power operating point that results in maximum efficiency.
Define: modulating boiler:
A boiler that is capable of more than a single firing rate in response to varying temperatures. Sometimes up to 70 or 80, allowing for more control.
What does a packaged boiler include?
Shipped complete with heating equipment, mechanical draft equipment, and automatic controls.
Define: branch circuit
A branch circuit is part of the electrical system that originates at the main service panel and feeds electricity throughout the structure.
Define: bubble point
The refrigerant liquid saturation temperature at a specified pressure.
Define: fenestration
The arrangement of windows and doors on the elevations of a building
Explain: low-emissivity coating
Also known as “low e coating” for windows - silver oxide applied to the glass between the panes to help contain heat.
Low emissivity coating is not required when…
existing glazing already has a low emissivity coating
Explain: U-factor
A window or door’s installation value
Explain: SHGC (Solar Heat Gain Coefficient)
Solar Heat Gain Coefficient – measurement of how much radiant heat that comes through a window. Heat from the sun. Numbers fall between 0-1, the lower the number, the less heat goes through.
A building does not need revolving or if…
There is a vestibule separating conditioned from unconditioned space.
Are vestibules required in all climate zones?
No, some exceptions include buildings under 1000SF in Climate Zones 0,4,5,6,7,8
Explain: R-value
The resistance of heat transfer through the insulation
Solar Reflectance Index (SRI)
Combination of emissivity and initial solar reflectance
What size of buildings require vestibules?
Generally speaking, buildings over 40K SF
Define: Thermal emittance
Thermal emittance refers to the ratio of the degree of radiant deflection of heat of a given object to that of a standard reference black body. It describes the degree to which a material can radiate the heat it absorbs.
Thermal emittance (ɛ) characterizes the surface capability to reemit the previously absorbed heat away from itself.
Among the three basic forms of heat transfer - conduction, convection, and radiation - the term emittance refers to a material’s ability to release heat through radiation.
