Windows & Doors

Connecting through Zola

If it’s not art, you don’t typically find me raving about stuff. I’m not much of a shopper and I like to spend my time gathering and connecting with people, getting outdoors, or digging into projects. But I have to say that we are wowed by our windows and doors.

Many times during the past […]

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Why high-performing windows?

We are excited to see that the Root River House is progressing so well, and that the window and door installation is complete. The windows they’ve installed dramatically outperform traditional U.S. windows, and John and Nancy have asked me to describe why. Can we really not buy a good window here in the States? Why […]

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Winter weather continues to threaten, but so far we’ve been able to avoid the worst and continue to make progress on a couple of exterior priorities…including the roof. Just before Thanksgiving, the roofing crew was back to finish all but one last panel on the house’s south side. It required a lot of detail-work to […]

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Windows, step-by-step…

“Super-insulated houses require ultra-performing windows and doors.” That’s Passive House architect Christi Weber’s opening line regarding windows and doors on the “project overview” page of our Root River House site. “It would be pointless to work on the home’s envelope, only to cut a bunch of holes in it and fill them with low-quality, leaky […]

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Sizing and placing windows using the Passive House Planning Package

The availability of not just good, but great, windows and doors has posed one of the greatest challenges for the growing Passive House (PH) movement in North America. As designers, builders, and owners, we take such care to provide a continuous layer of insulation and an extremely high level of air-tightness in the envelope that we almost donʼt want to poke any holes in […]

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Windows ‘n pavers ‘n roofing – oh, my!

Dorothy may have been taken by “lions and tigers and bears – oh my!” as she traveled the yellow brick road toward Oz, but we’re not building on the yellow brick road and this isn’t Kansas. Nonetheless, I had one of those moments Wednesday that had me feeling like Dorothy must have felt, twisting my […]

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Through the looking glass…sunny and 52º!

Today it’s overcast, gray and drizzly; but yesterday—YESTERDAY was one of those late-autumn days that we in the upper Midwest have learned to really appreciate and take full advantage of! And appreciate we did as it was delivery day for our European-style Zola windows and doors.

The three-week journey from the manufacturer in Poland—most of […]

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Lanesboro, Minnesota
Climate Zone 6 (cold/moist)
Latitude: 43° 44' 18'' N
Longitude: 91° 54' 48'' W

House Size

Net Treated Floor Area: 1,514 SF
Gross Square Footage (House only): 2,210 SF

Building Envelope

Roof: R-99
Wall: R-61
Ground: R-53

Windows & Doors

Glazing: U-0.10 BTU / hour / sq. ft.
Solar Heat Gain Coefficient (SHGC): 0.48”
Frame: U-0.19 BTU / hour / sq. ft.

Modeled Performance

Specific Primary Energy Demand (Source Energy Demand): 12.1 kBTU / sq. ft. / year

Specific Space Heat Demand: 7.0 kBTU/sq. ft. / year

Peak Heating Load: 7,047 BTU / hour

Space Cooling Demand: 0.44 kBTU / sq. ft. / year

Peak Cooling Load: 3,625 BTU / hour

Pressure Test Goal: Whole House Air Changes Per Hour (ACH) = 0.4 ACH 50


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