this report prepared by:
bldgtyp llc
CPHD (PHI))
CPHC (PHIUS)
231 Park Place #22
Brooklyn, NY 11238
info@bldgtyp.com
www.bldgtyp.com
Passive House is the most challenging energy standard for buildings
employed around the world today, with a strict cap on heating, cooling,
hot water, lighting and appliance energy use. By successfully employing
Passive House methods, a comfortable, durable and sustainable
building can be created which uses only a tiny fraction of the energy
that a 'conventionally built' structure would.
The building energy-use analysis presented on the following pages
assumes that achieving Passive
House performance level is the goal, however all of the data and analysis
presented here is relevant even if the building does not ultimately
achieve Passive House levels. The energy balance, comfort, and energy
use-by-area sections can be utilized to identify under-performing
areas outside of any specific energy-use targets.
The following energy model was conducted using the
Passive House Planning Package
energy modeling software. This model simulates comprehensive
heat-flows through the envelope elements to calculate yearly heating
and cooling energy use. This information is tabulated by building area
and presented in various forms in the following sections.
The model outlines energy use data for both the entire winter-period
(roughly Nov-May) as well as the entire summer-period (roughly June- Sept)
separately. In addition, the worst-case peak power loads of the heating
and cooling are assessed in order to determine HVAC system sizing.
For the analysis here, the following terminology is used throughout. For clarity, we have defined key terms below with the common Passive House definitions:
In Passive House terminology, the annual DEMAND is all the yearly energy needed by the building. This is assessed separately for heating energy, cooling energy, hot-water energy, and plug-load energy.
The LOAD is the power required from the heating and cooling system. In order to evaluate the building's performance, the load typically is assessed for the PEAK conditions (worst-case) for the heating and then again for the cooling weather cases. This also helps to establish the minimum acceptable capacities for the heating and cooling equipment.
The home's yearly total energy demand is translated into input energy at the source (power-plant) in order to assess the overall environmental impact of the home's consumption. This value can be understood as the building's total environmental impact or 'footprint.'