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Old 06-02-12, 04:09 PM   #11
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Default Dig, Vlad, Dig!


I'm not an HVAC technician. In fact, I'm barely even a hacker...
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Old 06-02-12, 05:42 PM   #12
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Yeah, 99% of the DoD's budget falls under "discretionary", not "mandatory". So?

You can't just go around looking at ~20% of the federal budget and calling it >50%, or it will be simply impossible to have a rational discussion with you.

Read the tabloids if you like, but cross-check it with the New York Times.
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Old 06-02-12, 09:37 PM   #13
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Way off topic, we've got government finances mixes up against Passivhaus, along with a misplaced YT video from the DIY GSHP ground gold drilling thread.
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Old 06-03-12, 01:06 AM   #14
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Default RE: video

Yep, I put the video there to remind people what it looks like to actually do something.

I think EcoRenovator is at its best when it results in action. Talk is not only cheap, it's almost worthless.

I'm not an HVAC technician. In fact, I'm barely even a hacker...
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Old 06-10-12, 04:52 AM   #15
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Default Curiosity of the air exchange number

Looking at this thread prompted me to find out what interm number of air exchange our improvments made in our home. The blower door tests conducted before and near the completed improvements had been done for the program that the Ontario government had implemented. The total improvements that I had planned had not been completed in the time frame the government had alloted us and in all likelyhood we have an even tighter envelope as I write this. Before any improvements 1.98 ACH @ 50 and 1 year later 1.90 ACH @ 50. ( The passivhaus 0.3 ACH @ 50 is impressive)

The company that performed the independant studies had been sold and I had to contact the original owner for the blower door test evaluations. The more interesting conversations followed. After he had told me the numbers he asked about the health of the homes occupants. Great but why do you ask.?? He remarked that homes of less than 3.0 ACH @ 50 do not natually allow enough fresh air for the health of the occupants and absolutely must have an air-exchange unit. Yes we have a HV unit. Good to know. He had inspected some retro-fitted homes and the people where having headaches and being generally listless from respired CO2 build-up as well as the homes having some moisture problems. He cracked some windows and told the owners not to close them until they had a air exchange system installed. This is a topic that Vlad had touched on. HVAC Ventilation is an important part of the acronym.

Speaking with the inspector further the amount of ACH that this area new home builders strive is 3.0 ACH @ 50 or better.
Although the ACH number was not our goal just a bit of attention to common building practise details netted a suprising number. And now knowing that good maintainance on the air exchange unit is an ABSOLUTE MUST for our health. I learned another VERY important thing prompted by the Eco-renovators.

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Old 06-10-12, 08:35 PM   #16
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1.9 is pretty good. Honestly you're probably in the clear. Getting any lower will cost more than you will save on just about any timeline. I should bring a blower door home from work one of these days to see where my house is at. Not that I really care. It will just be fun to know how much I will have tightened things up after the next round of improvements. For me, personally, the blower door is only good for two things
Appeasing inspectors, and
Pressurizing the house to test for leakage.

I suppose it has other uses. For example,if I had vermiculite 8n my attic I'd pressurise the house and vacuum it up instead of paying for remediation.

My project:

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Chipping away on a daily basis.

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S-F: "What happens when you slam the door on a really tight house? Do the basement windows blow out?"

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