With the goal of making structures more well sealed and a desire to know where our "makeup air" is coming from we are doing more amazing air sealing and adding tech, like HRVs and ERVs, to supply…Continue
"We know what the definition of "not going negative is..." but the definition of "good residential IAQ" has and continues to be a subjective definition. Even ASHRAE has danced around it. EPA (mostly for political…"
"Problem with some baths is they don't get enough supply air in so that cuts down on the amount that actually does get exhausted over time - well that & crappy ducting installs
2nd if one goes with an ERV is the air mixing & getting…"
"Matt,We air seal the ceiling and floor plane but, WX isn't quite there as far allowing us to vacuum the attic out or encapsulate the crawl ... but we're working on it. Again, thanks for the input, brother.MJ"
"Hi Michael - yes - I couldn't agree more with the health benefits you describe. Definitely a reason to consider ducted HRV.
I would also ask - at the cost of a ducted system - do you think the weatherization could go steps further to…"
"Matt,Thanks for taking the time to respond.The reason for not wanting negative pressure on the envelope for me, aside from the older combustion appliances (many times we replace), is that I find when doing IAQ testing, post air sealing and fan…"
"We have a '19 Leaf and a '13 Prius v. When the Prius is laid to rest we will replace both with Tesla products. These will be our last car purchases before retirement. The House will have PV installed this summer and will be 'off-grid…"
"Great discussion topic - and great title! I have a few thoughts,
First - is being negative so bad? All atmospheric appliances ought to go. As Sean suggests, direct vent or electrify. There are efficiency gains and carbon savings to be had.…"
"Dehu in a bath - no you still need to remove odors
HRV to bath - only if supply - yes I know some use them for exhaust but that can cause issues in some climates (ERV is definitely a no-no for exhaust)
Range hoods - if over 400cfm a makeup supply is…"
With the goal of making structures more well sealed and a desire to know where our "makeup air" is coming from we are doing more amazing air sealing and adding tech, like HRVs and ERVs, to supply tempered & filtered air to these hermetically sealed spaces ... BUT, we're still installing high power bath fans (some that run 24/7) to ventilate not only the bathroom but sometimes the "whole house". Is this the best we can do? Is simply connecting a leg of the HRV to the bathroom the answer?…See More
"Does the utility program calculate / make provision for 'line loss'. You would have to find out if this is the case from one of the utilities programmers. Most, other than the programmers, will not know if this is the case. Might be a…"
""Let’s think for a second about what a high performance assembly wants to be, and not just what’s the simplest way to pass the blower door test. Generally speaking, in cold/mixed climates the exterior wants to be relatively vapor…"
"I agree, Ed. The house itself scores an 80 but, add $100,000.00 in renewables and you get a -63. So, in my book, that does not make an efficient home ... just one that is HEAVILY offset with renewables. Don't get me wrong, I'm still happy…"
Welcome to Home Energy Pros Forum. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos, and upcoming events. If you're blogging about home performance, this is the place…"
"Due to just needing a temporary fix, I'd seal the ducts, wrap them in vinyl coated R-19 and build a weather resistant cover over everything. This would be the easiest to de-construct in the next couple of years and also give your clients…"
Welcome to Home Energy Pros Forum. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos, and upcoming events. If you're blogging about home performance, this is the place for you!