9.36 Energy Efficiency

Transcription

1 9.36 Energy Efficiency Housing 1

2 Credits and Source Material National Research Council of Canada Manitoba Office of the Fire Commissioner City of Brandon Planning & Building Safety Department Canadian Wood Council (CWC) Owens Corning Canada 2

3 What Buildings Will Be Affected? New construction for permits issued on or after April 1, 2016 for: All new single family dwellings All residential dwellings up to 600 sqm (6,458 sqft) of total floor area New buildings that contain a combination of residential, commercial and/or low hazard industrial occupancies, with a total combined floor area of less than 300 sqm (3,229 sqft) 3

4 Buildings that are exempt Existing buildings Renovations and additions (large additions will be looked at on a case by case basis) Farm buildings Temporary buildings Buildings that are not required to be conditioned attached and detached garages, storage sheds, seasonal buildings 4

5 Options Three options available to builders 1) Prescriptive which we will be discussing today ( ) 2) Performance path ( model housing) 3) Manitoba Energy Code for Buildings architect or engineer to do a complete model on all aspects of the building 5

6 Manitoba Zones 8 8 7A 7B 7 7A Manitoba is broken in to 3 zones - 7A in the south includes Winnipeg, Brandon, Portage, Dauphin - 7B is central and includes Flin Flon, Swan River, The Pas - 8 is for the northern Manitoba and includes Lynn Lake, Thompson, Churchill - RTM builders will need to determine the zone the building is going to, to ensure proper insulation value 6

7 Effective R Values for Zone 7A MBC is written in RSI values - to convert to R multiply by (R to RSI divide R by 5.678) Walls both above and below grade R-15.9 (includes rim joist) Skylights shafts are to comply with wall requirements (R15.9) Ceilings - R-48.3 Flat or cathedral ceilings R-28.5 Floors over unconditioned spaces R-28.5 (cabovers, cantilevered floors, crawlspaces) 7

8 Effective R Values Cont. Slabs on grade R-16.1 below slab, vertically around perimeter and out from perimeter a minimum of 24 Heated floors in conditioned spaces R-16.1 Unheated floors above original frost line R for 48 in from wall (original frost line is 4-6 below original grade) Unheated floors below frost line can be uninsulated 8

9 Minimum 12 heel height required 9

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13 ) Walls inclined less than 60 from horizontal are considered as roof Inclined wall considered a roof 59 13

14 Roofs inclined 60 or more from horizontal are considered walls Inclined roof considered a wall 60 14

15 R-Values MB amendments has 2 tables that, if used, no calculations are required and must be followed to comply with the energy requirements CWC has numerous tables that can be followed and also has a calculator Owens Corning also has effective thermal resistance calculator 15

16 R-Value When a building envelope is protected by an enclosed unconditioned space like a sunroom, enclosed veranda or attached garage the effective R-value can be reduced by.9 (This does not apply to vented spaces like an attic or crawlspace) Continuity of insulation to be maintained. ei:steel beams that extend to perimeter required to be insulated inward 4x the beam thickness 16

17 R-Value Recessed mechanical, plumbing and electrical components in an insulated wall are required to maintain the proper R-value. IE: wall insert heaters, electrical panels, venting for range hoods, plumbing stacks Mechanical ducts, plumbing or electrical in an insulated floor or ceiling assembly required to maintain a minimum of R

18 Plans The following is the required information to be supplied on any new residential house plans submitted after April 1, RSI of each element Total RSI or R value for the complete assembly 18

19 Information required on drawings for homes. RSI value indicated for each element Total RSI value listed for each assembly ROOF CONSTRUCTION (RSI- 9.50): ASPHALT SHINGLES 2 LAYERS ROOFING FELT 7/16 OSB SHEATHING C/W H-CLIPS AIR FILM (0.03) ENGINEERED ROOF 24 O.C. (RSI 1.96) R50 BLOW-IN INSULATION (RSI 7.30) 6 MIL CGSB RATED POLY V.B. (RSI 0.00) 5/8 TYPE X DRYWALL (RSI 0.97) CEILING FINISH BY OWNER AIR FILM (RSI 0.11) EXTERIOR WALL CONSTRUCTION (RSI 2.70): OUTSIDE AIR FILM (RSI 0.03) ACRYLIC STUCCO EXTERIOR FINISH (RSI ) 2 X2 WELDED WIRE MESH (RSI 0.00) APPROVED WATER BARRIER - ( TYVEC OR SIMILAR) (RSI 0.00) 3/8 OSB SHEATHING (RSI 0.093) 2x6 WOOD 16 O.C. C/W R20 BATT INSULATION BETWEEN STUDS (RSI 2.36) 6 MIL CGSB RATED POLY V.B. (RSI 0.00) 1/2 DRYWALL (RSI 0.08) INTERIOR FINISH BY OWNER(RSI 0.00) INTERIOR AIR FILM (RSI 0.12) FOUNDATION WALL CONSTRUCTION (RSI 3.20): PARGING TO BELOW 6 BELOW GRADE (RSI 0.00) ASPHALT DAMP-PROOFING BELOW GRADE (RSI 0.21) 8 X 96 CONCRETE WALL (RSI 0.08) 3 AIR SPACE (RSI 0.18) 2x4 WOOD 24 O.C. C/W R20 BATT INSULATION BETWEEN STUDS (RSI 2.53) 6 MIL CGSB RATED POLY V.B. (RSI 0.00) 1/2 DRYWALL (RSI 0.08) INTERIOR FINISH BY OWNER(RSI 0.00) INTERIOR AIR FILM (RSI 0.12) BASEMENT FLOOR CONSTRUCTION (RSI 1.88): INTERIOR AIR FILM (RSI 0.16) 4 CONCRETE SLAB (RSI 0.04) 6 MIL CGSB RATED POLY V.B. (RSI 0.00) 2 XTPS (RSI 1.68) 19

20 Airtightness Air barriers to be continuous on complete house All penetration through air/vapour barrier to be sealed (all penetrations through top plates, top of ICF forms to basement interior air barrier, etc.) A blower door test can be asked for if the air tightness cannot be confirmed visually 20

21 Windows & Doors Portage is in Energy Star s Rating Zone 2 All windows and doors to be labelled and show either a U-value or an Energy Rating U-Value cannot be greater than 1.6 Energy Rating cannot be less than 25 Skylights can have a maximum U-Value of 2.7 Attic hatches to be not less than R

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23 HVAC HRV s are required in housing Dampers shall be installed on ducts that discharge to the outdoors Gas furnaces required to be 94% efficient All ducts carrying conditioned air shall be sealed Thermostats to kick in when called for - not more than + or -.5 degrees C (1F) Gas fireplace to be direct vented and pilot on demand no standing pilot light 23

24 Plumbing HWT inlet & outlet to be insulated 6 back with ½ pipe insulation Continuously running recirculating service water system to have all piping insulated with ½ pipe insulation Drain water heat recovery required in houses with a shower Not required in a slab on grade or house on a crawlspace or if no shower installed 24

25 DWHR To be installed vertically Cold water inlet on bottom Downstream of a water softener, if one installed Installed in a conditioned space 25

26 ½ pipe insulation required 6 out from HWT Drain Water Heat Recovery Main water line goes into DWHR at bottom Warmed water comes out of top of DWHR and goes to either the hot water tank or back to the shower tap 26

27 Links (CWC) ators/thermal-project-calculator/ (Owens Corning) revisions_download.html (link to 9.36 NBC 2010 revisions & errata Dec. 2012) 27

28 THANK YOU Questions 28