" All new homes have the same degree of energy efficiency"
This is one of those things that are just not true, even though a large part of the buying public believes it to be.
First, there are some things that are in the new building codes that will make new homes maore energy efficient than their older counterparts. For instance; All new homes must be equipped with air conditioning systems that are at least 13 Seer. "Seer" is a term that refers to the amount of power used to produce a certain amount of cooling. As you get into the more expensive homes, you will see some higher seer numbers, like 15 or 16 seer. Most older homes came with 10 seer units, which simply means that it takes more power to produce the same amount of cooling.
In addition to the a/c system, the are a number of popular energy saving measures that can be installed in new homes. One that has become standard in many homes even in the affordable price ranges is the ridge vent ( a form of attic ventilation) It is a series of vents built into the ridges of the roof. This takes the place of the old "whirlybirds" or the old electric power vents. I live in Mississippi. The life of a power vent motor is about 2-3 years, then you buy a new one. The ridge vents are maintenance free and, since they work in conjuction with the soffett vents, they are much more efficient than other systems. There can be a difference of 160 degree attic versus a 115 degree attic. This makes a big differenc in the interior temp of the home.
The number of energy saving devices are limitless. Most peoples finances are not.There is cellulose insulation, tech-shield, tankless water heaters, Pink board, on and on. Not enough space here to talk about all, but they all help with utility bills.
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