The 2014 Alberta Building Code section 9.36 Energy Efficiency is divided into 3 main scopes, that cover 3 main areas of the buildings energy efficiency;
3.Service Water Heating (DHW)
There are 3 compliance paths
1. Prescriptive - with and without heat recovery
2. Simple trade off (only within the building envelope)
3. Performance - Energy model required
NOTE: The code uses Effective Insulation levels – NOT Nominal levels – I.E. a 2X6 wall with studs at 16” on center with nominal R-20 batts, has an effective value of approximately R-15.5.
SIMPLE TRADE OFF
1.Follow the required building envelope insulation levels published in tables
188.8.131.52. A 184.108.40.206. B, 220.127.116.11 A, 18.104.22.168 A
2.Follow the required HVAC Efficiency published in tables 22.214.171.124
3.Follow the required DHW Efficiency published in tables 126.96.36.199
Effective Insulation values required by Part 9.36
Climate Zone – 7A 5000-5999 Degree Days
Calgary, Red Deer, Edmonton
NO HRV With HRV
Attic InsulationR- 60 R- 50
Wall & Rim Insulation R-24 Batt R-22 Batt
Foundation Insulation R-24 Batt R-22 Batt
Cantilevers R- 28.5 R- 28.5
Windows Overall Average U-1.60 + .26 SHGC
HRV N/A 60% efficiency
Furnace 92% AFUE
A/C SEER 14.5 or EER 11.5
Boilers 90% AFUE
DHW – Natural GasTank 67% EF
DHW – Natural Gas Tankless 80% EF
Air Tightness 2.5 or 3.2
if prescriptive air tightness requirements are followed
You can decrease insulation in attic by increasing insulation in walls.
Trade only within Building Envelope
Simplified List - See 2014 ABC section 9.36 for details
See 2014 ABC Part 9.36 for details or contact us for consultation.
No Energy Models required
No Energy Models required
As above, but trade wall insulation, attic insulation foundation insulation or windows
ONLY applies to the Building Envelope Components
NO HVAC or DHW trade-offs allowed.
Build an energy model of the house you plan to build called the PROPOSED house.
By adding heat recovery (HRV) you will likely achieve compliance without adding any other items as long as you follow the prescriptive requirements for achieving the 2.5 ACH.
You can model for lower ACH numbers, but anything lower than 2.5 will require an on-site air test (following prescriptive air tightness allows you to forgo the on-site air tightness testing)
FOR MOST NEW HOMES - ADD HEAT RECOVERY AND YOU WILL COMPLY (Energy model required)
•Energy Model required
•Prescriptive air tightness 2.5 (no on site test required)**
•R-20 walls and rim,
•R-12 frost walls
•Dual, Low E, argon Windows
•95% AFUE furnace, SEER 14.5 or EER 11.5 Air Conditioning
•67% EF DHW tank or 80% EF Tankless
**A house can be modeled to a lower ACH, which will reduce energy usage, but an on site blower door test must be used to achieve compliance. Using a prescriptive 2.5 ACH will allow you to forgo the on site blower door test
The above represents an example ONLY - Each house must be energy modeled and compared to a prescriptive REFERENCE house to determine compliance
Use the PROPOSEDhouse to build the REFERENCE house.
The REFERENCE house uses the insulation values from the non-HRV tables. It also places equal amount of windows on 4 sides at between 17% and 22% window to wall ratio (FDWR). The REFERENCE house does not have heat recovery.
WINDOWS - Most new homes have between 8%-12% windows to wall ratio or FDWR ( Fenestration Door Wall Ratio). If you have less than 17% windows in the PROPOSED house, you will have to add windows to the REFERENCE house to bring it up to a 17% minimum, divided equally on 4 sides. If you have more than 22% windows in the PROPOSED house, you can only model the REFERENCE house with a 22% maximum FDWR. Anything between 17%-22% will use the actual FDWR number.
The total energy consumption of this REFERENCE house is the baseline energy consumption.
If the PROPOSEDhouse is equal to or lower than the REFERENCE (baseline) house, then you comply with the code.
You must print out the house reports (or if manual calculated, provide paperwork)
Most municipalities allow you to perform the calculations, but they are complex. Check with your local AHJ (Authority Having Jurisdiction) as to the requirements for section 9.36 compliance.
Qualistat Building Performance Consultants offer performance compliance energy modeling for new homes.
Most average new homes are approximately $400 + GST
Contact us for more details
As of November 1, 2016, section 9.36 of the 2014 Alberta Building Code will be applied to new permits.