Image Credit: Tony Grahame
Image Credit: Tony Grahame Sprayed polyurethane foam and rigid XPS foam with taped seams are very effective as insulation and air barriers.
Image Credit: Tony Grahame 与典型的房屋相比，工程桁架和先进的框架方法可为足够的绝缘材料和使用少的材料提供空间。家里的所有标头都用XPS泡沫绝缘。
Image Credit: Tony Grahame 房屋从平板太阳能收集器中获取大部分家用热水。
Image Credit: Tony Grahame Image Credit: Toshi Woudenberg TOP 25% OF AMERICAN HOUSES: 40.8 MMBtu/year. There's nothing particularly complicated about this home - it's just built very well. The large crew of student laborers from the Yavapai College Residential Building Technology program may have made it easier to find every possible air leak in this thoroughly sealed, mechanically ventilated home. But that's not to say that a well informed, concientious contractor wouldn't be just as succesful at building an affordable, energy efficient home.
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#Typical Looking, Uncommonly Efficient and Healthy
This rather typical-looking single-story ranch house is very uncommon in a lot of ways. It’s super energy-efficient, it has superior indoor air quality compared to most new houses, and it cost $55/square foot to build.
面对绿色建筑的常规思考，建造苍蝇是如此便宜。这是怎么做的？权衡。更少的螺柱意味着更多的绝缘空间。屋顶悬垂和优质的窗户意味着一个较小的交流系统。未通风的屋顶意味着交流和管道可以进入阁楼。
Make the site work without overdoing it
成本节约始于网站:substandard lot (thanks to flood-plain issues) was engineered to bring it up to code. While there was a high level of engineering involved, the lot was kept localized as much as possible — many existing trees and shrubs were spared. No toxic pesticides were sprayed before construction, and the house is oriented along an east-west axis to maximize southern exposure for day lighting, passive warming in winter, and solar collectors on the roof that heat the water for free.
标准绿色细节做得很好
先进的框架，外部泡沫绝缘材料和未通风的屋顶产生了极其紧密的信封 - 0.63 ACH，没有“额外”的费用。智能的管道布局减少了热水到达水龙头所需的时间，从而节省了水。这座房屋的设计和建造中使用的许多技术都是旧消息：绝缘板使其保持温暖干燥；外部泡沫护套使框架保持温暖干燥，因此霉菌不太可能立足。更好的窗户值得。
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Lessons Learned
由于批量很小，因此对于该项目而言，标准的化粪池浸出场是不可行的。Yavapai College的住宅建筑技术计划主任Tony Grahame通过Eljen制造的土工织物砂滤清器系统解决了这个问题。
与典型的砾石床相比，覆盖有特殊排水织物的塑料网格可以使更多的表面积，更多的体积和更多的空气浸润。结果是您获得了一个浸出场，在少50％的空间占用50％的同时，它可能会表现更好。使用此系统是在此特定站点上建造房屋的唯一方法，但是对于试图将站点骚扰最少的任何人来说都是有价值的。
General Specs and Team
| 地点： | 普雷斯科特，亚利桑那州 |
|---|---|
| Bedrooms: | 3 |
| Bathrooms: | 2 |
| 居住空间： | 1189 |
| Cost: | 55 |
| 补充说明： | 学生劳动是免费的 |
Builder:Yavapai College住宅建筑技术计划；托尼·格雷厄姆（Tony Grahame），导演。
Architect/designer:Prescott-area Habitat for Humanity
Construction
Foundation:坡度的平板在Edge（R-5）上带有XPS泡沫（R-5）
Walls:2x4 @ 24 in. o.c.; 1-in. XPS foam and dense-pack cellulose (R-19 total)
屋顶：抬起脚跟桁架；8英寸的泡沫喷涂到屋顶甲板的底面（R-32，未发泄）。
视窗：double-pane, low-e, argon-filled (SHGC, .33 to .35; U factor, 0.32 to 0.35, R-3)
车库:attached; insulated and sealed from living space
活力
- 屋顶悬垂的尺寸最佳，可用于窗户高度，以允许夏季窗帘和冬季阳光进入，以进行无动太阳能加热。
- 活力Star interior and exterior lighting package with CFL bulbs
- 极其紧密的建筑信封（103 CFM @ 50 Pascals等于0.63 ACH）
- 活力Star appliances
- HVAC要求计算并适当尺寸
- 可编程恒温器
- Sealed ductwork; duct blaster leakage measured 14 cfm @ 25 Pascals
能源规格
Heating/cooling:14 seer Energy Star AC系统；40,000 BTU直接通风炉（92.0 AFUE）
Water heating:solar domestic hot-water system, 40.9 sq. ft. flat-plate collector, 80-gal. storage tank with electric backup
HERS rating:57 (5 stars)
年度使用：40.8 mmbtu
Water Efficiency
- Low-flow toilets, faucets, and showerheads
- Water-conserving dishwasher
- 30英尺内热水储罐内的所有热水水龙头
Indoor Air Quality
- Balanced whole-house ventilation with MERV-10 and HEPA filtration
- Moisture-mitigation techniques including damp-proof subslab, soil surface graded away from house, foundation drains around perimeter, plastic sheet under slab, wall system designed for drying to inside and outside, appropriately size HVAC controls humidity
- Garage pressure-isolated from living space
- Radon venting
- 没有地毯
- Multiple-return grills provide pressure-balancing between rooms
- 条件空间内的所有管道
- Spot ventilation in bathrooms
绿色材料和资源效率
- 先进的框架技术
- House designed in 2-ft. increments to conserve materials
- Cellulose insulation made with recycled paper
- 复合甲板包含可回收的塑料
- Cardboard and metal construction waste recycled
Alternate Energy Utilization
太阳水加热：40.9平方英尺Sunearth平板收集器；Solaraide 80-GALLON热水储罐/电动备用加热器
Certification
NAHB能源价值住房奖：gold
活力Star:qualified based on HERS score (57)
5 Comments
Checking on the true cost
This is certainly an admirable project and I very much appreciate the simplicity of the efficiency - fewer high priced/high tech products and lots of good, simple decisions. I would like to understand what the relative cost of this house if all the labor was included at market rates instead of donated student time. We need to see more projects like this completed with the structure of the marketplace.
该项目说明了一个
该项目说明了一个lot of good concepts that can be translated to any climate zone. Comfortable,Efficient and Affordable.
一些好主意...
这是一个有用的案例研究。尽管人工成本和整体房屋规模并不是最有用的比较，但这里还是有很多有趣的想法。我现在正在考虑的一些概念是太阳能水加热（平面面板是更好的长期价值与撤离管？），2x4（24“ oc）/2x6（24” OC），具有良好的绝缘材料与ICF/SIP的，土工织物的沙子过滤器，而不是标准的化粪池外侧，并在条件空间中带有管道的未通风屋顶（该如何工作？）。感谢您发布此项目！我从案例研究中得到了一些很棒的想法。
家庭改建
Thanks for this. Always looking for new approaches to green construction. The Geotextile Sand Filter system sounds like an impressive innovation. In my area lots are getting smaller and smaller as property prices rise, so any and all space-saving efficiencies are well appreciated. I'm going to check out the Eljen website right now! Thanks.
40,000 BTU炉？
It seems to me that a home with 2x4 walls filled with dense pack cellulose and 1" of XPS foam on the exterior, located in Arizona, that is only 1200 square feet would not need a 40000 BTU furnace, particularly if attention was paid to the air barrier. Oversized, perhaps? Having said that, it is hard to find conventional furnaces manufactured with a lower BTU rating.
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