CVH Net Zero Monroe Landing
End Use: This house may eventually become the guest house, with a slightly larger "main house" planned just below it on the same property. The owners are enjoying the smaller home, and the relaxed lifestyle that comes with it, so they are considering not ever building the "main house", or at most making it about the same size as this one, but only one bedroom, with a larger great room and kitchen.
Why SIPs?: "Zero-Energy Construction was a primary requirement for these customers, and SIPS construction is by far the most cost-effective way to get there from here." Ted Clifton
Benefits of SIPs: This home was designed with SIPS in mind, and the heights of walls, the pitch of the roof, and spans of roof SIPs were all optimized for passive solar gains, active PV system exposure, and to fit within the parameters allowed by the NTA report for Premier SIPs. There would have been no way to stick-frame this house for less than what we spent on SIPs construction.
Innovative Design Elements: The home has a very large feel due to the cathedral ceilings, but we dropped an 8' ceiling over the bathroom, giving us a nice large attic space in which to house the air-handling equipment and provide the owners with lots of "free" storage area. We have also learned that even though the engineering does not require them, using an I-Joist spline between your 8' wide roof panels makes the roof go together much easier because the panels are much stiffer when you have two guys up there bouncing around on them trying to pull the roof panels together.
- Energy Star
- Indoor Air Plus
- USDOE Zero-Energy Ready
Blower Door Test: .89 ACH 50
Energy Use: 27.04/kBtu/ft2/Yr
HVAC: Because the heat loss to the outside is so small, a single-head ductless heat pump, located above the entry door in the great room, is able to heat the entire unit, with the bedrooms remaining just a couple of degrees below the great room.
Energy-Saving Materials/Energy-Efficient Products/Design Features:
- Vinyltek Triple-glazed windows were used, with U-values ranging from .16 to .21, depending on the type and size of the window.
- 4" (R-20) foam insulation was used under the entire slab
- 2" (R-10) perimeter insulation was used to isolate the earth under the house from the surrounding surface air temperatures.
- All lighting was 100% LED
- All appliances were EnergyStar
- Passive solar was designed with the south-facing window optimized for passive solar gains.
- Summer cooling is managed by the thermal mass slab
- Generous roof overhangs limit the ability of the summer sun to penetrate the high-solar heat gain windows
- Those same windows provide much of the required heating during the winter months.
Solar: A 6.3 kW solar array was installed on the garage, which will provide enough energy to power the house on an annual basis, with enough surplus energy to power an electric car for about 5,700 miles per year.
Client Comments: The architectural features of this home were required to meet the design guidelines of the Ebey's Prairie National Historic Reserve. This project is an outstanding example of how modern building materials and methods can combine with a very traditional design to produce exemplary performance results." Ted Clifton