Michael Tolhurst
@michaeltolhurst
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registered architect + certified passivhaus designer
Canberra, Australia
Joined November 2011
These graphs illustrate the temperature and indoor air quality for the summer months, from 1st December 2022 to 28 February 2023. . The first slide shows the average figures for the 3-month period. Unfortunately these graphs seem to be based just a singl… https://t.co/Li5RtemBxS
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I worked out that my Passivhaus journey has taken over 7 years to get to this point…a Certified Passivhaus plaque! It feels like a bit of a metaphorical exclamation point to close this chapter. And now with the first project under my belt I hope ther… https://t.co/LYaQFQqPKn
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Another 6 months and another HRV filter replacement is due. As usual the outdoor air intake filter on the right is pretty dirty. But I the extract air filter on the left looks pretty good and could likely keep going. If the filters were available individ… https://t.co/FhGHsevRai
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It was about 36 degrees outside today. Here are a couple of screenshots from the Zehnder app showing how the heat recovery works in reverse. I’ve said before that a HRV doesn’t provide cooling. I guess this is partly true. . When these images were saved … https://t.co/CYmxwBx2Pj
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The heating/cooling system in the greenhouse has a higher capacity than what’s in the house. As it turns out it’s probably oversized. We haven’t had any really hot weather to really test it. It’s 31 degrees outside today and it’s probably not far from th… https://t.co/wBu7qD7zV4
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6 month update on the temperature and indoor air quality – from July through December. The indoor temperature has risen quite a bit now that we are well into summer. Generally I’m finding it very comfortable. Sometimes I feel too warm and want to open … https://t.co/Qc4slo6tsb
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Bird’s eye view of the perforated aluminium awning on the north east facade. Summer shading is supposedly one of the hardest aspects to properly model using the PHPP software. Which is obviously important in warmer climates. PHPP10 now includes an in-b… https://t.co/RABAxEAPFI
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Last week we had several consecutive days of above average temperatures, and I thought I’d do a quick analysis of the internal temperatures. Low 30s is pretty normal at this time of year. But nowhere near the low 40s that we sometimes experience. . Using… https://t.co/sBhfkKkeVp
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I’m pretty happy to see the end of 2022 to be honest. It’s been a challenging year that’s ended with me taking the leap into becoming a sole-practitioner and being able to focus on Passivhaus work full time! . This year’s top nine posts are probably pret… https://t.co/AvCw8A1TfD
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With new software now available I’ve been refreshing my knowledge of PHPP and designPH. I’m in a position where I can now start take on both architectural commissions and PHPP modelling (for both owners and other architects/designers). . For those unfami… https://t.co/YkV2TK0aCn
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An update on temperature and indoor air quality over the past 5 months (from mid June to mid November). . Temperature is a little skewed to the cool side because we were without a proper heating system for about 2 months from August to September. The war… https://t.co/xlW4XB7WrO
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International Passive House Open Day is a virtual tour this year. Check out @passivehouse_australia for registration details. https://t.co/xt4TPYUyzq
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The Canberra Low Carbon Housing Challenge is being featured as part of this years Design Canberra festival. There will be a house tour of Narrabundahaus on Sunday November 6. Numbers will be limited and bookings required, but it hasn’t been added to the … https://t.co/pByaa9SXsR
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The garden is starting to fill in down this side. Nice to see vibrant greens against the red bricks and matt colorbond. https://t.co/bmxxUHbm0K
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Shading is probably the hardest aspect to model in PHPP. It’s not just roofs and eaves, it’s awnings, blinds, other buildings and trees. The biggest risk is overestimating the effects of shading in summer, which can potentially result in overheating or i… https://t.co/q6AVr8v7Ds
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I was asked by local real estate firm @blackshawrealestate to contribute some words for an article on Passivhaus design in their quarterly lifestyle magazine. It’s great to hear that energy efficiency is becoming increasingly important to buyers. And it’… https://t.co/5kjVZO1m6Q
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