Learn how to do a home energy audit on your home. Educational Videos on a Home Energy Audit Series by Greenovation Builders.
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How to Choose Energy Efficient Windows Female: We have completed the process of the blower door test, checking the duct work and checking pressure in the rooms. And now Gary is proceeding on the next step of which audit which involves… Gary: The last phases are more to just information gathering, I have to get information off the mechanical equipment, the furnace and the air conditioner and the water heaters. I have to get measurements of the house so I calculate square foot as in volume. And then also lastly I will get up in the attic and see what I can see up there. And that will be it as far as information gathering. Female: And a couple of things I want to bring up before you move to the steps Gary. Some important things I thought are customers might like to know about what you mentioned with the low E windows. Can you elaborate on that like you told me earlier a little bit more? Gary: Well sure, glass can be a large loss of heat or energy and if your house has a particularly large amount of glass. It may lead to high bills and possibly discomfort so if you are building new, low E is generally considered a good choice. But after the fact on a retro fit typically windows are not the place you want to start because they are so expensive. And as long there are reasonably air sealed that as far as you want to go. I meant if you get a single pane, metal frame windows. Definitely that is a good candidate for replacement. But otherwise if your windows if you can get them to just air sealed fairly well. You might consider solar film because that performs as a low E coating and it can be really helpful if you have a lot of glass. Female: And that solar film that you are talking about in building a new home, you can order windows that already come with this. I mean I notice the measurement the tool that you are using to measure check for that film is that what you said. And then you also said that there is a rating on there for a solar gain. Gary: How much of sunlight the glass allows through. Female: And I love what you said about how the different sides of the home might require a different kind of window. And if you are working with a good window company and a builder who knows about that you can adjust – go ahead can you tell you adjust for? Gary: Sure, a good window company well you can order glass in any different configuration. So for example if you had a passive solar design, you would want insulated glass on the south side because you want high solar gain because you want that heat. But in other applications say if you have a large expensive glass on a west exposure where there is unwanted heating in the afternoon in the summer, you would want low solar gain so you don’t have excessive heat that will prevent the heat if it did into the windows. Female: And you can kind of configure the windows? Gary: Right so it is just a matter of design but there a lot of options out there that could help. Female: Alright great, thanks.