Quote:
Originally Posted by Brian Carlton
What is the comparison with wood windows and storms versus a decent new window.......say Anderson double hung.......with regard to energy efficiency?
I'd presume that the storm does the majority of the work with regard to limiting airflow and the three inch space between the two windows is superior to the 1/2" space on the double glazed Andersens.
Be interesting to see a side by side comparison, although it's difficult due to the lack of any data on the wood window/storm window combo.
|
I say that ANY double glazed modern window is superior in every possible way to an old single pane with triple tracks. There is no way the 3" airspace is better than the 1/2" in the double glazed. Two reasons: The storms/triple tracks are not completely sealed at their perimeter, they have moisture drains, etc. The single pane double hungs also do not have particularly good sash seals, etc. so drafts are common complaints. When you do tighten up old windows they then are usually too tight to operate if the wood swells a bit. So in winter they are loose in the dry air and summer they swell and don't open or close. A modern double glazed window is completely sealed with either a vacuum or an inert gas between the panels. I have toured a Guardian Glass plant and seen them being made. Its really pretty impressive. Well all know how well a vacuum thermos works, its the same principle. The modern materials in the seals on the sashes is also light years ahead of any old window.
I've installed more new windows than I care to mention. In each and every case the result is less drafts, better insulation, less noise, etc. all leading to more comfort. Unless you are restricted by the local hysterical (historical) nazis you would be insane not to upgrade if possible.
Never done a Pella but haven't heard any negative things about them around here yet. Time will tell though if they have cheapened the product.
RT