Future tree planting on the two acre lot will offset remaining lifetime carbon emissions.

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1 Luxury Net-Zero Home by Rockwood Custom Homes 47 Grandview Place, Calgary AB T3Z A8 by Grant Bremner A Net-Zero Emissions (NZE) home is carbon neutral where carbon credits fully offset emissions. An NZE 1 has low-carbon design and technologies, and runs mainly on renewable power, often producing as much electricity as it consumes. Rockwood designed this luxury home in Springbank to be NZE, a first for Calgary. Achieving NZE, this innovative design combines transitional aesthetics with quality construction. This leading home has excellent energy performance with efficient gas and electricity consumption. This family home has a comfortable interior climate while minimizing active heating and air conditioning systems. With Passivhaus-consistent design and construction, heating energy consumption is one fifth of a conventional home. State-of-the-art programmable Nest learning thermostats conserve energy enabling online management of the climate from smartphones. Rockwood applied passive solar design principles. The house heats naturally on clear winter days with south-facing window placement plus a thermal heat mass in the basement. It is superinsulated and airtight with triple-glazing, energy efficient heating, and HRV systems: Superior insulation: 8 to 16 thick walls and high R-value ceilings, walls and doors. Spider insulation throughout all exterior walls (R-3+) and ceilings (R-55). To achieve airtightness in essential areas, closed-cell spray polyurethane foam (SPF) was used sparingly. Airtight construction: vapour barrier sealed plus controlled ventilation systems. Blower door test conducted during construction to locate and seal air leaks in the building envelop. Superior windows: Triple-glazed, Argon-filled, Lo-E EnergyStar windows reduce energy consumption and heating costs. Remote control of upper vaulted windows. Energy efficient heating: Hi-Velocity gas heating air delivery system, plus hydronic in-floor heating combined with high-end heat recovery ventilation (HRV) offer best of both worlds (i.e. passive and active). Hi-Velocity has an EnergySmart motor with a variable frequency drive. Heat recovery & ventilation: The HRV system substitutes for the passive systems in extreme weather to increase heat on colder winter days. In winter, the HRV pre-heats incoming cold air to reduce energy consumption and heating costs. Bathroom fans interlock with HRV. In summer, the HRV system and basement windows draw in naturally cool air from beneath the shaded deck and circulate throughout the house and out through upper vaulted windows. A high efficiency modulating/condensing Bosch boiler generates heat, piped throughout house from an indirect-fired Bradford & White highly insulated hot water storage tank. A programmable recirculation pump pre-circulates water throughout the home during usage hours. Active daylighting, EnergyStar appliances and efficient LED lighting significantly reduce electricity consumption. Motion sensors turn lights off after people leave rooms. A passive wine cellar in the basement naturally maintains the room at a constant cool temperature with sufficient humidity. The home is pre-wired for a future 8kW solar PV array which will generate most electricity on-site, and export surplus power to the grid offsetting electricity emissions. Future tree planting on the two acre lot will offset remaining lifetime carbon emissions. 1 In the EU, NZE stands for Nearly Zero Energy, and in California the idea is known as ZNE (for Zero Net Energy). All new homes in the EU and in California must meet the NZE or ZNE standards by 22. Energy and emissions aims are interrelated refer architecture23.org

2 Rockwood has built the first luxury Net-Zero home in Calgary; solar power and tree planting offset carbon emissions. Net-Zero Emissions from 215 to 25

3 16 This leading home s annual emissions before tree planting offsets will be 8 percent lower than comparable high-end homes. Annual Energy Annual GHG Emissions Consumption (kwh) (t-co2e) % A (25) B (1999/27) C (26) 47 (214) A (25) B (1999/27) C (26) 47 (214) Natural Gas Electricity Electricity Emissions Gas Emissions

4 This luxury family home uses 7 to 8 percent less heating energy than comparable homes in Calgary. 18 Annual Heating Energy Consumption (kwh/m2) A (25) B (1999/27) C (26) 47 (214)

5 Over winter gas consumption averaged 5 kwh per heating degree day (HDD) while virtually no heating was required in the fall. HDD kwh 7 Gas Heating v Heating Degree Days Heating Degree Days kwh Aug 18-Aug 2-Aug 22-Aug 25-Aug 26-Aug 3-Aug 2-Sep 4-Sep 7-Sep 9-Sep 1-Sep 12-Sep 15-Sep 17-Sep 18-Sep 2-Sep 24-Sep 28-Sep 2-Oct 6-Oct 1-Oct 14-Oct 18-Oct 22-Oct 26-Oct 3-Oct 3-Nov 7-Nov 11-Nov 15-Nov 19-Nov 23-Nov 27-Nov 1-Dec 5-Dec 9-Dec 13-Dec 17-Dec 21-Dec 25-Dec 29-Dec 2-Jan 6-Jan 1-Jan 14-Jan 18-Jan 22-Jan 26-Jan

6 Actual space heating energy consumption appears to achieve targets for Energy Star, EnerGuide (ERS) and R-2 ratings. Gas Heating Actuals 14 August 214 to 28 January ,18 kwh 19 BTUs/h per square foot; houses range from 1 to 1 BTUs/h; New Energy Star ,kWh annual versus R-2/ EnerGuide target of 31,kWh Allocated usage by zone applying BTU/h ratings of each heating appliance Estimated 6,71kWh usage for domestic hot water Minimal heating for Garage

7 This Rockwood home approaches the Passivhaus standard of 25 kwh per square metre for heating and cooling Gas Heating Passivhaus Standard (Annual Maximum) kwh 1 kwh/sqm 5 Forecast Estimates 14-Aug 19-Aug 24-Aug 27-Aug 2-Sep 6-Sep 1-Sep 13-Sep 17-Sep 19-Sep 26-Sep 3-Oct 1-Oct 17-Oct 24-Oct 31-Oct 7-Nov 14-Nov 21-Nov 28-Nov 5-Dec 12-Dec 19-Dec 26-Dec 2-Jan 9-Jan 16-Jan 23-Jan 3-Jan 6-Feb 13-Feb 2-Feb 27-Feb 6-Mar 13-Mar 2-Mar 27-Mar 3-Apr 1-Apr 17-Apr 24-Apr 1-May 8-May 15-May 22-May 29-May 5-Jun 12-Jun 19-Jun 26-Jun 3-Jul 1-Jul 17-Jul 24-Jul 31-Jul 7-Aug 14-Aug

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