It’s surreal when you come to the realization that you want to move back home to the small town in which you were raised…
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Quick update on this afternoon’s virtual tour . . . There will be info and good takeaways for all audiences, so I would love to have anyone who is interested join us. Link to the meeting info is in my bio. See you all in a couple hours! . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive
Earth Day 2020 virtual tour - I want your input . . . I’ve participated in the local Earth Day events for the past two years, and this year, we’ll be going virtual! I’d like to poll the audience to get a feel for what everyone would want to see. We’ll be doing the tour via Zoom (meeting info is in bio link), so I could just stay all video and show you around our place and answer questions, or I could show some slides and then do a little video tour with questions. What would be your vote? For some background, our house will be the first home in Montana certified by the Passive House Institute. It’s a 2500 sq ft, 3-bed, 3.5-bath home located in Red Lodge, MT (climate zone 6). We have a wood stove (yes, this is 100% possible in a Passive House). I built nearly the entire home myself and can cover all aspects of the design and construction in as much detail as desired. Our family of four has been living in the house full time for over 6-months, so we have direct experience with life in a Passive House. I have a lot of data - internal temperatures/humidities, external temp/humidity, ventilation performance data, heating energy use data, full home energy use data - so I could show and speak to any of that information. What do you all want to see and what questions do you want me to answer? . . . A huge thank you to @rockinradams for organizing the virtual Earth Day. . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive #earthday #earthweek #earthday2020 #virtual #education #input
People are dirty . . . Changed the exhaust port cone filters yesterday. These were last changed on New Years Day, so they contain a little over 3 months worth of accumulation. We’re still doing some interior finish work, so I’m sure that contributes a bit to the dirt, but I’d say the vast majority of the build up is from everyday living. Dirtiest filter was in the kitchen, next dirtiest were in each of the bathrooms. The cleaner filters were above the laundry area, in the mudroom, and in the downstairs half bath. Nice to have these filters in place to keep all of the exhaust tubes running back to the ERV much cleaner. We’ll see how they look after another 3 months or so . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive #filter #filteredair #cleanair #filth #dust #details @zehnderamerica
Proof is in the data - Passive House works . . . Data is hard to argue against. It isn’t affected by emotion or subjectivity. It is, what it is. Sensors aren’t trying to prove or disprove anything. First, overview of our house. It’s a two-story rectangle. Around 2500 sq ft. Three bedrooms, 3.5 bathrooms. Four people live here - myself, my wife, and our 8-yr old daughter and 5-yr old son. Kitchen and living room are downstairs. Bedrooms are upstairs. Thermostats are always set at 66 degrees. Now the data. First pic is the Sensorpush data coming into the ventilation unit from outside. Second pic is the Sensorpush data of the air being extracted from inside the house. Third pic is from this morning and is of the individual thermostats that control our in-wall electric heat (4 located upstairs, 1 downstairs). Last pic is the electricity usage and associated cost of all heating in the month of March . . . This morning was the second coldest of the year (it’s been a mild winter in terms of temps) - just under 4 degrees. Peaked at 25 degrees yesterday. Snowed nearly the entire day yesterday. No heating occurred at all yesterday or throughout the night. Indoor bulk temp peaked at 73 degrees yesterday evening. Minimum inside temp of 68 occurred this morning just after 8. 5 degree temperature drop - that’s it. Outside temps were 50-65 degrees lower than inside temps. Nuts. Temps through the entire house only varied by 2 degrees - 66 in the master, 68 everywhere else. Nuts. Our electrical usage for heating during the ENTIRE month of March was 10.4 kWh, or 92 cents. Nuts. This is the data. Make your own interpretations. . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive #data #datadoesntlie #comfort #insulation #highperformance #objective #warm #efficient #efficiency @sensorpushtech @getmysa
Achieving airtightness IS NOT hard, it just takes careful planning, attention to detail, and pride in your work . . . Last week we had the final blower door test. The one that counts towards PHI certification. The one that will make the difference for years to come. Our initial blower door test, performed in March 2019, was beyond my expectations. 0.17 ACH50. Windows were installed, the air barrier (Intello) was exposed, but there were only a couple of penetrations through it. Fast forward to last week. Nearly a dozen total penetrations through the air barrier, windows had been installed for over a year, and the wood stove had been installed. I’d taken care to seal all the penetrations, but the wood stove made me nervous. The test is run using the EN13829, Method A standard. This includes both depressurization and pressurization of the envelope at various differential pressure steps. Depressurization is first. The results...0.14 ACH50! Lower than the initial test - even with the wood stove installed! Next was pressurization. Again...0.14 ACH50! Absolutely incredible. Anyone can build airtight. I’d never built a house prior to our project. I’m not a genius, nor am I a wizard with air sealing tapes. I like to plan, am a little OCD when it comes to detail, and really take pride in what I do. That’s it. Nothing magical. Nothing unattainable. There’s no reason at all that my results can’t be repeated by others. Thank you to @emubldgscience for the countless hours of details, planning, and support, @foursevenfivedotcom for providing the Pro Clima products, and absolutely amazing support to back them up, used in our project, and @advantagewoodwork for the bombproof, beautiful Smartwin Compact windows and Smartwin Entrance door. Check these folks out. They provide amazing services and products . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive #blowerdoortest #retrotec #airtight #airtightness
Ground loop preheat data . . . This graph shows 3 weeks worth of data from the ground loop preheat unit. X-axis is outdoor temp in deg F. Y-axis is the temperature increase being measured across the ground loop heat exchanger. I’m capturing this data using Sensorpush sensors. At colder outdoor temps we’re seeing over 30 degrees worth of heating from the ground loop system. It makes sense that we lose heating efficiency at warmer outdoor temps. Energy consumption of the pump when it is circulating is between 30-35 watts. Tons of different ways to use/analyze this data, so more to come as more data is gathered. Any guesses as to why we’re seeing a couple different slopes in the data? . . . #beartoothpassivehouse #beartoothph #beartoothphcc #redlodgepassivehouse #highperformancehomes #montana #redlodge #myredlodge #passivehouse #passivhaus #runwildbuildpassive #data #geothermal #erv #zehnder #sensorpush @sensorpushtech @zehnderamerica