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Contents
Introduction
Thank you for having us to your home for a system airflow assessment. I hope that it was beneficial. We learned a lot about your system during the brief visit. So, let’s jump in to some of the things discovered.
Below is a summary of the system measurements and some recommendations. As part of the service we ran airflow test and forecasting.
Once you read the report you’ll have 3 options: do nothing, pick and choose upgrades, or do more planning for more difficult goals or complex projects. These options are discussed at the end of the report as well as our leanings for your home.
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Airflow Assessment
While on site, we also measured the total system airflow and static pressure of the system. Static pressure is equivalent to the blood pressure of your system and gives us a better understanding of the overall ability for the system to provide the proper amount of airflow, as well as how much it may struggle to do so.
Static pressure is the amount of resistance that the blower has to work against in order to move air through the system. Things that have an effect on the static pressure of the system include, air filters (size and type), duct sizes, amount of ducts, length of ducts, duct fittings and transitions, as well as internal system components. Each component of the system has a resistance associated with it that the blower has to overcome, by taking some key measurements we are able to determine the TESP of the system. While there are several static pressures in the system, when we talk about static pressure we are generally referring to TESP.
Static pressure (TESP) has a range of low, acceptable, or high. While these numbers are specific to the actual equipment, most manufacturers follow similar standards. For the sake of simplicity, 0.5" wc or under is an acceptable target, 0.8" wc is generally the max acceptable static pressure (although we like to stay well below this if possible), and above 0.8" wc is considered high and should be addressed. Low is generally not common and is rarely problematic, so it is not focused on much.
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Your Static Measurements
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The above image is a snapshot of the static pressures recorded for your system. This shows that the static pressure of your system is very high (1.114" wc). The primary culprits for the high static pressure are that the filter is undersized for the airflow required and the return duct sizing is small.
These measurements were taken in the heating mode because your system does not currently have air conditioning. Currently the heating airflow is on the low side for what is required for your system (1200 CFM would be ideal). This should be adjusted if possible during the install to get better performance and efficiency out of the system, given that some static pressures can be improved during the project.
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Static Measurements Forecast
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The above image is a snapshot is of a forecast of the static pressures after adding air conditioning. It should be noted that these measurements are based solely on the airflow required for cooling mode, not for heating mode (in other words, heating mode is going to be higher because the airflow requirement is higher).
This shows that with an upgraded filter we can get the static pressure below the 0.8" wc max target while in cooling mode.
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Summary
The purpose of the system airflow assessment is to help find the correct airflow or improvements that are required to increase the system longevity and efficiency.
Regards,
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[Here is a link to all the documents][document-folder]
[!NOTE:]
Documents are stored on our internal servers and links to your documents expire in approximately 30 days from the creation of your report, for security reasons. We recommend that you download any documents you would like to keep for your records. If you have troubles then we can send the documents via email or extend the expiration date of the provided document links.
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