You can keep a spotless house and still have problems with the air inside it. Your HVAC system circulates air throughout the day, but a standard filter may not capture the finer particles you're concerned about. Meanwhile, excess humidity can leave rooms feeling clammy, and overly dry air can make winter uncomfortable. Improving indoor air quality means understanding what's happening in your home and addressing it with the right equipment.
That's where we can help. CityLine Air Conditioning offer whole-home air purification and UV lights, humidifier and dehumidifier installation, and indoor air quality testing across Dallas-Fort Worth. From improving filtration to keeping humidity under control, our team helps you make informed decisions about the air circulating through your home.
A standard HVAC filter isn't designed to capture every fine particle circulating through your home. Whole-home air purifiers and higher-efficiency filtration can help reduce airborne dust and other particles. UV lights have a different job: installed near the indoor coil, they can help control microbial growth on surfaces exposed to the light. We'll check equipment compatibility before recommending an upgrade.
Explore Air Purification & UV Lights »Keeping the thermostat low doesn't always solve a muggy house, and turning up the heat won't add moisture to dry winter air. Whole-home dehumidifiers remove excess humidity, while humidifiers introduce moisture when indoor conditions become too dry. We assess your home's humidity levels and HVAC setup to determine which solution suits the problem.
Explore Humidifiers & Dehumidifiers »Wondering why the air feels uncomfortable even when your heating and cooling system seems to be working? Indoor air quality testing can help identify measurable conditions affecting your home. Instead of choosing equipment based on a hunch, you'll have findings to discuss and a clearer direction for any recommended improvements.
Explore Indoor Air Quality Testing »Want to improve your home's indoor air? Call (972) 776-4455 to discuss your concerns and explore the available solutions. Request Indoor Air Quality Service »
Not every air quality problem has the same cause. A room that feels damp needs a different solution than one with too much airborne dust. Here's how to narrow down which service may help.
| What you're noticing | Where to start | What it does |
|---|---|---|
| The house feels clammy even with the AC running | Whole-home dehumidifier | Removing summer moisture the AC leaves behind |
| Static shocks on cold winter days | Whole-home humidifier | Adding moisture back to heated rooms |
| Dust settles again a day after you clean | Filter upgrade or air purification | Catching more particles as air moves through the system |
| Dust puffs from the vents when the system starts | Duct cleaning | Clearing buildup inside the ducts |
| You can't tell what's wrong, only that the air feels off | Air quality testing | Finding the cause before buying equipment |
It depends on what your home needs. A filter upgrade is a small change, while a whole-home dehumidifier or humidifier is an installation that ties into your system and ductwork.
Your technician will explain each option and put the price in writing before anything is installed, so you can start small and add more later if you want.
The air quality products we install run through your heating and cooling system, and because we service that system too, the add-on and the equipment get set up to work together, not against each other.
A denser filter catches more, but it can choke airflow if the fan isn't built for it. The EPA notes that an HVAC technician can help pick the most efficient filter your system can use, and that's the advice your technician gives.
We describe air quality equipment by what it does: removing moisture, adding it, or catching particles. You won't hear promises about your health, just a clear account of what changes in your home.
Call and describe it: muggy summer rooms, dry winter air, dust that won't stay away, or a general feeling that something is off. If you've already tried a different filter, mention that too.
Your technician checks the filter, the indoor unit, and the ducts near it, and takes iPad photos of anything that stands out.
You'll get the options that fit your home and the price for each. Nothing is installed until you approve it.
Once the equipment is in, your technician shows you how to use it, from changing filters to setting the humidity level.
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No cooling or no heat? Call (972) 776-4455, day or night.
You spend plenty of time indoors, so why put up with air that never feels quite right? Whether you're interested in better filtration, more balanced humidity, or simply understanding what's circulating through your home, we're here to help you explore the options. Call (972) 776-4455 to get started.
Not every air purifier, UV light, or humidity control system works with every HVAC setup. Our technicians can review your existing equipment and explain which upgrades are compatible, so you can make a practical choice without unnecessary changes.
Unsure whether filtration or humidity is the bigger concern? Ask about indoor air quality testing. Depending on what's measured, the results can help narrow down your options before you invest in additional equipment.
4.7stars on Google reviewsAir feel heavy in summer or dry in winter? Call (972) 776-4455 · Book Online
From Richardson and the northern suburbs to communities across the Mid-Cities, CityLine Air Conditioning helps DFW homeowners improve indoor air quality through filtration upgrades, UV light installations, humidity control, and air quality testing.
Our residential service area covers established neighborhoods and newer developments throughout the Metroplex. Availability in Dallas and Fort Worth depends on the ZIP code.
Contact our office to confirm service at your address.
Our Service Area
Don't see your street? Call (972) 776-4455 and ask.
The technicians were professional and very knowledgeable. We had our AC serviced, new Gas Furnace installed with air purifier, and also had our air ducts cleaned. I would go to CityLine first before any other company!
Kyle Cooper
The technician, Alberto, arrived on time, knew the equipment he was working on, was very professional, and was happy and very thorough.
Alann Nevarez
They contacted us in a timely manner, were on time for the service call and took care of the issues.
Jeffrey N.
Alberto Nevarez was great. Helped inform us of everything we needed to know plus extra. He went above and beyond to educate us as new home buyers of our systems and needed maintenance. 10 out of 10 would recommend
Tony A.
CityLine came to my home to check my unit for heating for this winter and were excellent. Technician Jay Jones was superb! He explained in detail everything he reviewed and gave me confidence in the service provided. 10/10! Would recommend to everyone!
Ryan F.
Travis came by to do a check up on the system. He's very courteous and friendly. All is well with the system.
Adrien C.
May 5, 2026You might not think much about dust. It gathers on shelves, settles on furniture, and seems like nothing more than a minor household annoyance.
May 4, 2026It’s 2:00 PM on a July afternoon in Dallas-Fort Worth. The thermostat reads 97°F outside, and you just realized your AC is not turning on.
May 4, 2026You’re sitting in your living room when your air conditioner kicks on and something sounds… wrong. Maybe it’s a metallic banging that wasn’t there last week.
The EPA suggests MERV 13 or the highest your system can handle. Too dense a filter can choke airflow, so your technician checks what yours accepts.
Installed near the indoor coil, they can limit microbial growth on the coil and inside the system. We don't present them as a health treatment.
Often, yes. If the house feels clammy with the AC on, consider one. It removes moisture on its own, so the AC doesn't overcool the house to dry it.
Check it monthly, as ENERGY STAR advises, and change it when it looks dirty. Thicker filters may last longer, but they still need checking.
Most mount in or near the indoor unit and run with your system's fan. We check the space and the fan before recommending one.
Office hours 8 AM to 6 PM, with phones answered around the clock.
