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Goodbye 2014… 2015 Get Ready!

With 2014 coming to a close, we just want to remind everyone of the new standards and codes that will be going into effect in 2015. For our Rhode Island friends and customers that are building a new house, this means you! More and more cities and towns are adopting ASHRAE, (American Society of Heating, Refrigeration, and Air Conditioning Engineers), 62.2 standards and in that vein, new construction dwellings will need an Air Change Per Hour and Blower Door Test conducted BEFORE you will be issued an occupancy permit!

Why is this important? Well, Air Exchanges per hour, (or ACH), is a measure of the air volume added to or removed from a space (normally a room or house) divided by the volume of the space. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced. So how does this effect your new home? Well because of the changes in ASHRAE 62.2, home builders must incorporate air sealing measures into the construction of your home. That means that the new homes are “tighter” than previous homes. So in order to measure this tightness, a blower door test must be conducted. This test de-pressurizes the home, pulling out the existing air and pulling in replacement air. If the home is too tight, make up air will need to be introduced. This is achieved with either an Energy Recovery Ventilator or a plain old ventilator may be needed to introduce outside air.

So as you can imagine, this can be very confusing for contractors and building inspectors alike, her at Alternative Weatherization, we offer solutions for getting these test performed and getting you the certificate you will need to pass and get on with your project, give us a call or email us, we are available most weekdays and some weekends to come out and get this done!

Air Changes Per Hour

Blower Door


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