<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">GreenbuildingAdvisor.com always has good info btw. Martin Holladay is the usual writer of note. He offers good advice for lay energy interesteds.<br>
<br>The most recent issue, May 22, has an article about energy upgrades that explains basic stuff about energy performance, how its measured, ie blower-door and thermal imaging basics.<br><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">
Also that Marvin is gearing up to offer Passivhaus Windows.<br><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Check it out.<br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">
<br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Sacie<br></div></div>