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Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Designing the Zero Energy House NetZEB Concepts.

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Presentation on theme: "Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Designing the Zero Energy House NetZEB Concepts."— Presentation transcript:

1 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Designing the Zero Energy House NetZEB Concepts A1 Sofeh Work Shop for SABA Seminar 21/02/1392

2 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Who We Are Eyvan Sofeh Co. Internationl Design, Construction & Development We Do: Engineering Procurement Construction Management Financing

3 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com What IS NetZEB? Goal : House is designed to produce as much energy (Renewable) as it consumes on yearly basis. The power grid is our storage system. The surplus of energy produced in low peak time is to be transferred to the Grid Reduction on Energy Consumption is the first priority. This purpose can be achieved through Passive Energy Home Design

4 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Our Motivation To prove that a NetZEB, market-viable speculative house is possible. Cost competitive Beautiful Sustainable Because energy independence and health Natural Environment is important. Because Energy Resources are limited and should be saved as well for next generations Because reduces Energy bills amount for home owners

5 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Highly Insulated, Tightly Sealed Envelope High Efficiency Mechanical System High-Efficiency Appliances Taking Advantage of Free renewable Energies for Heat, Cool, and Electricity How to achieve NetZEB

6 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Beyond NetZEB Water efficiency Sustainable materials LEED-H Platinum Rating Leadership in Energy & Environmental Design for Homes. Levels (high to low) Platinum Gold Silver Certified EnergyStar Home Public Outreach and Education Market Viability

7 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Design Process Integrated Design Team Architect Owner Builder Mechanical Electrical and Plumbing Engineer (MEP) Structural Engineer Civil Engineer Landscape Architect LEED Consultant/Green- Rater Sustainability from Day-1 Staying focused on goals Accepting trade-offs Energy vs. water vs. materials Sustainability vs. cost Up-front vs. recurring costs Exploit synergy, know when to stop

8 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com The Architectural Design (Example) Comfort Aesthetics Efficiency Sustainability Cost Context Kitchen viewed from Dining RoomFront of house with entry and pergola. First floor Second floor Living room & Dining room viewed from Kitchen Solar array

9 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Site Selection (Example) Infill vs. Virgin Territory Public Amenities Transportation 29 T2 32 1/4 mi 1/2 mi

10 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Site Selection (Example) Infill vs. Virgin Territory Public Amenities Transportation Community Services Greenspace PARK CLUBHOUSE

11 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Site Selection (Example) Infill vs. Virgin Territory Public Amenities Transportation Greenspace Community Services House Orientation for optimum solar income: Passive solar design Solar hot-water and Electricity.

12 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Envelope – Insulation The cheapest energy to buy is the energy you dont use. Continuous Air-Barrier, sealed at all openings and edges. Basement walls : R-20 (R-13 by code) Slab : R-10 Wall : R-33 (R-19 by code) Roof : R-50 (R-30 by code) High-reflectivity roofing to reduce heat island

13 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Envelope – Windows Windows/Doors U-factor = 0.32 (R3) Solar Heat Gain Coeff. (SHGC) = 0.28

14 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Envelope – Windows Windows/Doors U-factor = 0.32 (R3) Solar Heat Gain Coeff. (SHGC) = 0.28 Limit East and West facing Glass At least 50% more glass on North and South than on East and West. Shade South-facing Windows and Doors exclude heat in summer, admit it in winter SOUTH

15 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Envelope – Windows EAST WEST NORTH SOUTH Limit East and West facing Glass At least 50% more glass on North and South than on East and West.

16 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Passive Mechanical Systems – Natures Services Natural ventilation during swing months Operable windows Cross-ventilation Timed or Humidistat controlled fans in bathrooms. Awnings and trees reduce cooling requirements in summer. South orientation allows for some passive heating in winter.

17 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Active Mechanical Systems – Heating & Cooling Geothermal – Ground Source Heat Pump Energy Recover Ventilator Sealed duct work, all INSIDE the Envelope. Mechanical Ventilation – seal tight, ventilate right – 0.35 air changes per hour. House zoned to allow upstairs and basement to be shut down when not in use. Master bedroom is also a separate zone for day-night differential control. BASEMENT ZONE 1 ZONE 2 ZONE 3 ZONE 4

18 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Appliances EnergyStar Appliances Refrigerator Convection ovens Induction cooktop Dishwasher Clothes Washer (no dryer is energy efficient – consider clothesline instead) Compact Fluorescent (CFL) and LED Lights, EnergyStar Ceiling Fans. Gas fireplace w/ Electronic Ignition

19 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Power Generation (Example) 9.5 kW Photovoltaic array Goal: 100% of annual electricity needs 49 panels on the roof Two inverters in the basement Grid tied : power grid is our storage system Solar Hot Water system Goal: 85% of hot water needs 2 flat panel panels on roof (tubes another option) 120 gallon pre-heat tank in basement

20 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Energy Balance Achieving Zero Energy is the goal, but dont have to go that far to save money and the environment. High efficiency envelope, HVAC and appliances cuts demand to manageable level. Cut usage first before buying more PV panels. Knowing when to stop – the better it is, the harder it is to improve.

21 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Water Efficiency No irrigation system required. Plants are drought tolerant. Low-flow fixtures 1.75 gpm shower head 1.5 gpm lavatory faucets 1.1 gallon per flush toilets Clothes Washer – Water Factor 5.5 Recirculation pump – water recirculated to tank until desired temperature is reached. Fixture-by-fixture graywater reuse – had to delete because of county permit trouble. Still considering rainwater harvesting s s s Motion Sensor Hot Motion Sensor UMP sink tub shower

22 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Finish Materials – Sustainability LEED Recognizes following materials as environmentally preferred: FSC Certified (Forrest Stewardship Council) Recycled (including rubber) Reclaimed Local Rapidly Renewable (bamboo, linoleum) Low VOC (Volatile Organic Compounds). No urea-formaldehyde No exotic woods Durability – more about how and where materials are installed than materials themselves.

23 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Finish Materials on the Example Project No added urea- formaldehyde in anything Low VOC paints, sealants, adhesives. Hard-floors instead of Carpet FSC / reclaimed / local Hardwoods Engineered wood Linoleum Rubber Cabinets FSC / reclaimed / local woods Framing FSC framing or trim Window / Door framing – hard to get.

24 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Landscaping (Example) Keeping rainwater on-site Nearly 100% Pervious surfaces. Light colored surfaces to reduce heat island effect Rainwater harvesting Green Roof (OPTION)

25 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Landscaping (Example) Shading the House (but not the panels) Saving potable water 100% Drought tolerant High-efficiency irrigation system Native Species Only Protecting house No materials that attract termites within 2 ft. of house. Minimize site disturbance, add plantings to eliminate erosion.

26 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Cost Advantages of Green Building (Example) Basically prepaying your energy bills for next 25 years. Its (relatively) inflation- proof Its deductible Comfort Sustainable materials are healthier for you and your family to live with. Tight, energy-efficient construction is more comfortable to live in (when properly designed). Grants and Tax Rebates in Europe, USA and Canada Additional Discounts on Energy Efficient appliances (from Manufacturers), Not in Iran

27 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com ROI on Green Building (Example) One Example $11,900 added cost $1000 added mortgage payments per YEAR $1,900 utility savings per year About $900 / year ROI Example project for NetZEB

28 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com LEED and other standards Administered by U.S. Green Building Council (USGBC). Considered by many to be the de-facto standard for green home construction LEED-H is administered by approved network of Green Raters. Other standards exist EnergyStar (U.S. EPA) NAHB (National Association of Home Builders). Others?

29 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Summary – the Fundamentals Site selection Energy efficiency Water efficiency Sustainable materials Recycled Reclaimed Local Certified Demolition and construction waste management.

30 Meditch Murphey Architects A1 Sofeh Co. Isfahan, IRAN, Tel: (311)663 9087, Fax:(311)663 9088, www.a1sofeh.com Summary Have to decide whats important to you. Setting priorities and limits. Synergy and Holistic design – Look for opportunities to achieve multiple goals with one solution. Explore LEED but be open to other options too. You want something that you will love and which will enrich the community. This is why Architects are especially important. The Zero Energy House Project embodies all these principles and is at frontier of market-rate speculative house construction. Webcam image April 13, 2009 8:21 AM Making Progress


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