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Signs That Your House May Have an Air Quality Problem

Views: 2     Author: Site Editor     Publish Time: 2018-04-13      Origin: Site

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Just like the human body, if the house is in trouble, it will show a series of signs to help us diagnose when the system isn’t working properly.


The main problems to diagnose the houses are:

1. Inadequate air exchange (too little ventilation);

2. Excess infiltration (through walls or ducts);

3. Excess moisture.


Often, excess moisture speaks for itself. If you see condensation, mold, or excessive ice buildup, you know your house have a problem.


Signs of Inadequate Air Exchange

Odors can be very good indicators of too little ventilation. How persistent are certain odors? Where are they generated and where are they getting trapped?


If odors persist for hours, it is because either the source keeps on releasing the chemicals we smell, or the air carrying the odors does not have a quick, controlled way out of the house. If your house contains a lot of cloth furnishings, they will also trap odors. It can be instructive to think through what it means when some strong odor does or does not percolate through the house. If that odor doesn’t reach the rest of the house, this may mean that kitchen ventilation is working very well


Signs of Excess Infiltration

Excess air infiltration often leaves characteristic “fingerprints” that can be read or felt. Most obvious is when you feel a draft, particularly in winter and especially when you are closer to exterior walls. One less obvious sign of infiltration is frequent static electricity discharges in winter due to indoor humidity levels that are too low. Also look for “ghost” tracks of dark dust near boundaries that are poorly sealed. These tracks are most common on light carpets near exterior walls, and as black edges on fiberglass insulation batts between joists in the attic. What is happening is that dusty air is moving through the wall and dropping the dust when it reaches the wall and its velocity slows.


If you have air conditioning and heating equipment in the attic, your duct work is very likely the cause of infiltration, and you should seal and insulate the ducts accordingly. Otherwise, the best way to address excess infiltration is to seal obvious leaks in your windows, walls, and connections between your house and your attic, as described in the building envelope section. If you are unsure of how to find leaks, hire a contractor to conduct a blower-door test to identify and seal them.


Signs of Too Much Air Exchange

If you live in a dry climate, or a place with cold, dry winters, and it is uncomfortably dry inside, check the fan speed on any ventilation equipment you might have installed before running out to buy a humidifier. Likewise, if you live in a hot, humid climate, high ventilation rates can increase indoor humidity beyond what the air conditioner can control on its own, requiring supplemental dehumidification.


If you want to control the quality of the air in the house and reduce the influence of the seasonal environment on the house, you may need an air purifier, and in the dry season, you need a humidifier. With these air cleaner and humidifier, you don't have to worry about air quality? The answer is no. You also need to wash and replace the air purifier’s filter and humidifier filter regularly because they play a vital role.


To learn about the air filter and humidifier filter replacement, you can read another of our article: How Often To Replace Filters for Air Purifiers and Humidifiers

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