Upload
nguyenkiet
View
214
Download
0
Embed Size (px)
Citation preview
Energy Step Code requirements for Part 9 buildings
City of Richmond
June 29, 2017
BCBC 9.36.3 prescriptive pathway vs. performance-based Energy Step Code
Part 9
Energy Step Code
Climate Zone 4: 1 page
Section 9.36
103 pages
Climate Zones
The BC
Energy Step Code
has different targets
for different
climate zones.
Metro Vancouver
is in Climate Zone 4
Part 9 Step Code Requirements Climate Zone 4
(Lower Mainland and southern Vancouver Island)
Step
Bu
ildin
g en
ergy
mo
de
l
Airtightness Requirement:
Performance Requirement of Building Equipment and Systems
Performance Requirement of Building Envelope
Blower door test
ACH50: air changes per hour @
50 Pa pressure differential
Reference House:
__% better than ERS v15 ref. house
OR
mechanical energy use intensity
(MEUI): kWh/m2·year
thermal energy
demand intensity (TEDI):
kWh/m2·year
OR
peak thermal
load (PTL): W/m2
1 report score 0% OR conform to Subsection 9.36.5
2 ≤ 3.0 10% OR ≤ 60 ≤ 45 OR ≤ 35
3 ≤ 2.5 20% OR ≤ 45 ≤ 40 OR ≤ 30
4 ≤ 1.5 40% OR ≤ 35 ≤ 25 OR ≤ 25
5 ≤ 1.0 ≤ 25 ≤ 15 OR ≤ 10
Buildings are a system
Indoor Air Quality
Window Efficiency
Building Massing
Airtightness
Ventilation
Climate
Window Size & Placement
Solar Gain
Energy Use
Insulation Levels
Mechanical Efficiency
Energy Loss
Comfort
Moisture Control
Durability
Airtightness
• All buildings at all levels of the Energy Step Code require a blower door test at post-construction. The airtightness data from this test is entered into the building model to check for building compliance at the post-construction stage.
• Important: Whole buildings are tested, not individual building units.
• The number of times the full volume of air in the building is replaced during an hour when the building is pressurized and/or depressurized by 50 Pascals relative to outdoor air pressure. (Note: Step 1 does not have an airtightness target)
AND
Equipment and Systems
The modelled amount of energy used by space heating and cooling, ventilation, and domestic hot water systems compared to the amount used by the same home if it were built to minimum BC Building Code prescriptive requirements.
(Note: BCBC 9.36 prescriptive pathway = Step 1)
• The modelled amount of energy used by space heating and cooling, ventilation, and domestic hot water systems, per square meter of conditioned floor space, over the course of a year. (Note: easier for bigger homes to achieve)
OR
Building Envelope
• The modelled net total annual amount of heating energy needed per square metre of conditioned space floor area; including both:
• heat loss through walls, windows, etc., and
• “passive” heat gains from solar heating (walls & windows), cooking, lights, and body heat.
• The modelled maximum amount of energy needed to heat a building on the modelled coldest day of the year, per square metre of conditioned space floor area; a.k.a. “Design Heat Loss.” (Note: Intended for use mostly in northern BC)
OR
Step 1: “Enhanced Compliance” ~ BCBC 9.36
Initial staff proposal for stakeholder consultation purposes, for 2018 – ~2021: -detached residential, including houses with secondary suites -duplex / triplex -low-rise apartments
Step 2 Step 2: ~ BuiltGreen Gold Step 3: ~ Energy Star for New Homes
Initial staff proposal for stakeholder consultation purposes, for 2018 – ~2021: - townhouses - very large detached residential
Step
Bu
ildin
g en
ergy
mo
de
l
Airtightness Requirement:
Performance Requirement of Building Equipment and Systems
Performance Requirement of Building Envelope
Blower door test
ACH50: air changes per hour @ 50 Pa
pressure differential
Reference House:
__% better than ERS v15 ref. house
OR
mechanical energy
use intensity (MEUI):
kWh/m2·year
thermal energy
demand intensity (TEDI):
kWh/m2·year
OR
peak thermal
load (PTL): W/m2
2 ≤ 3.0 10% OR ≤ 60 ≤ 45
OR ≤ 35
3 ≤ 2.5 20% OR ≤ 45 ≤ 40
OR ≤ 30
Step 4
AND AND
Step 4: ~ R-2000
Initial staff proposal for stakeholder consultation purposes, for 2018 – ~2021: - Specific incented “showcase” buildings only
Step 5
AND AND
mechanical energy use intensity (MEUI): kWh/m2·year
Step 5: ~ Passiv Haus / ~ Net Zero Energy Ready
Initial staff proposal for stakeholder consultation purposes, for 2018 – ~2021: - not recommended for 2018
Applying the Step Code in Richmond Part 9 Buildings
Preliminary proposal only – input for stakeholder consultation
Building type Current approximate
Energy Step Code Performance Level
December 15, 2017
~ 2021 ~ 2025
Part 9 detached homes, duplexes
BC Building Code Step 1 Step 3 Step 4
Part 9 very large detached homes
BC Building Code Step 2 or 3 Step 3 or 4 Step 4 or 5
Part 9 townhouses
~Step 2-3 Step 2 or 3 Step 3 or 4 Step 4 or 5
Part 9 low-rise apartments
BC Building Code Step 1 Step 3 Step 4
Part 9 commercial / industrial
BC Building Code BC Building Code ? ?
Part 9 all renovations / additions
BC Building Code BC Building Code ? ?
City of Richmond Airtightness Training Program: July – December 2017
• The City of Richmond will pay all costs for:
• A pre-drywall blower door test and diagnostic walk-through for on-site workers:
• For houses or townhouses under construction within the City of Richmond.
• The City shall provide no more than 3 tests for any building or company.
• One day off-site airtightness training session for:
• general contractors;
• insulation sub-contractors; and
• sheathing sub-contractors
associated with an active Building Permit issued by the City of Richmond.
• The City shall fund no more than 3 persons from any company
• First come, first serve, subject to discretion of City staff.
Thank you
• Questions? Please contact:
Nicholas Heap Sustainability Project Manager
City of Richmond [email protected]
(604) 276-4267