crawl space a/c unit

[lincolnboy]

I have a a/c unit in the attic and wonder if the unit has a filter. I replace my wall placed filter every 30 day or less. I have been in this house for 5 month and it has started to get really dusty to wherr we dust 3x a week.

[GeorgeG.]

If there's only one air return, this alone could be the problem. Our house has one air return and the opposite side of the house tends to get dusty.

But to answer your question, yes, the air handler could have a filter.

[black2002ls]

Look for a door on one side of the unit in the attic. There will be a couple of clips holding the door shut if there is one up there. I am assuming since it is in the attic it is hung horizontally?
The units we are installing have 4" filters at the unit only.

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[lincolnboy]

So how many returns should be in a house. I plan on goin up in the attic today to look for a door and yes it is position horizontally in the attic. thanks guys.

[GeorgeG.]

depends on how the AC system was designed. If it's more to the center of the house or if the house has a small footprint, one is probably fine and was designed that way. The larger the footprint and I'll be looking for more.

We've been looking at houses and the number of air returns is at the top of my list of "must haves". I'm fed up with the dust. We looked at one house that was built around 2007'ish and it had an air return in EVERY room! But at the least, I'm looking for two large air returns on each side of the house.

If this just started recently, I wonder what the chances of an air duct slipping partially off the air register are? Is the air ducting the old "grey" duct or the shiny "foil" look? The old stuff can dry and split open.

[mustang1200]

Explain to me why the number of returns has anything to do with the amount of dust in a house. My house is 2700 sq ft and it has 4 large returns.

[black2002ls]

The homes we are building have a return air in every room. From what I understand, it helps maintain temperature in the rooms as well as air circulation, especially if the door is closed to that particular room. We also have fresh air vents on our systems.

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[mustang1200]

The homes we are building have a return air in every room. From what I understand, it helps maintain temperature in the rooms as well as air circulation, especially if the door is closed to that particular room. We also have fresh air vents on our systems.

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We have vents above the doors to rooms that don't have returns. It's to help equalize pressure and temperature.

[black2002ls]

I have a a/c unit in the attic and wonder if the unit has a filter. I replace my wall placed filter every 30 day or less. I have been in this house for 5 month and it has started to get really dusty to wherr we dust 3x a week.

One thing to keep in mind as well is that the ground outside is much drier than when you moved in 5 months ago. This leads to an increase in dirt in the air outside so if you open widows, let animals in and out or otherwise open the doors frequently.

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[GeorgeG.]

Explain to me why the number of returns has anything to do with the amount of dust in a house. My house is 2700 sq ft and it has 4 large returns.

I'd say less to do with the amount of dust but more to do with the amount of dust/air that gets sucked up and filtered. Less returns means the air (and therefore dust) has to travel farther to reach the air return. While the air will eventually get there, I'm sure the dust settles in low-traffic areas long before reaching the air return.