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Indoor air & ducts

Humidifier and Dehumidifier Services

Whole-home humidifier and dehumidifier installation, repair and maintenance for Hillside, IL.

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SquareHVAC technician servicing a whole-home humidifier on a furnace

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Choose your next step

What should you do next?

Not sure if you need service now or can wait? Use these signs to choose a practical next step. Talking through what your system is doing does not commit you to an appointment.

See smoke, flames or signs of a fire? Leave the building, stay out and call 911. If there is no fire and it is safe to use the controls, switch the system off and call SquareHVAC.

Emergency service is available 24/7, including Sundays.

Urgent

Call now

For smoke or flames, leave the building, stay out and call 911. Call us for water leaking from equipment, or if the system has stopped and the quick checks below did not help.

Call (708) 673-5633

Within a few days

Request service soon

Arrange a visit when humidity becomes uncomfortable, condensation appears, or the equipment repeatedly needs attention.

Send a service request

No rush

Monitor and plan

If your humidity equipment is working normally, follow its routine care schedule and plan a visit when needed. If new symptoms appear, request service sooner.

Request humidity equipment service

Quick checks before you call

Quick checks before you call

  • Check the setting on the humidity control (humidistat).
  • For a whole-house humidifier, check that the water valve to it is open.
  • For a dehumidifier, check that the drain line is not blocked or the bucket is not full.
  • Check the filter: a clogged filter limits airflow. Replace it if it is visibly dirty.

Signs to call us about

Signs you need a humidifier

  • Dry, itchy skin and chapped lips
  • Frequent static electricity shocks
  • Scratchy throats and irritated sinuses
  • Cracking wood furniture or flooring
  • Indoor humidity consistently below 30%

Signs you need a dehumidifier

  • Musty odors or a damp feeling in the air
  • Condensation on windows and walls
  • Visible mold or mildew growth
  • Increased allergy or asthma symptoms
  • Indoor humidity consistently above 50%

Your home’s comfort depends on more than temperature. If the air feels dry and irritating in winter or sticky and heavy in summer, humidity is the reason. SquareHVAC is based in Hillside and serves communities within approximately 30 road miles. We install, repair and maintain whole-home humidifiers and dehumidifiers.

Technician connecting Aprilaire whole-home humidity equipment to residential ductwork

Why humidity control matters

The EPA recommends keeping indoor relative humidity between 30% and 50% (US EPA, checked October 2026). Midwest weather pushes your home to both ends of that range.

Humidifier services

Whole-house humidifier installation

A whole-house humidifier connects to the HVAC system and adds moisture to the air as it circulates — every room, not just the one with a portable unit. It protects wood floors, furniture and instruments, reduces static, and makes the air feel warmer at the same thermostat setting.

We assess the home’s size, ductwork and comfort needs to recommend the right capacity.

Humidifier repair

If an existing humidifier is not producing moisture, leaking or making noises, we diagnose and fix the problem. We service the major whole-house brands.

Humidifier maintenance

A maintenance visit before the heating season covers cleaning, filter replacement and calibration, so the unit does not grow mold or bacteria.

Dehumidifier services

Whole-house dehumidifier installation

A whole-house dehumidifier works alongside the air conditioning to remove excess moisture. The home feels cooler and less clammy, mold and dust mites get less to live on, and the air conditioner does not have to do all the dehumidifying on its own. Homes with basements or damp crawl spaces benefit most.

Dehumidifier repair

Running constantly without removing moisture, freezing up, or failing to drain — we troubleshoot and repair all of these.

Dehumidifier maintenance

Annual maintenance cleans the coils, checks the refrigerant, inspects the drain line and verifies airflow.

The written quote

We explain what we found and what it costs, in writing, with parts and labor listed separately. You review it; you decide. Work only begins once you approve.

All services

What happens during the visit

  1. Step 1

    Request

    You call or send a request, and we confirm the time of the visit.

  2. Step 2

    Humidity check

    The technician measures the home's humidity and inspects the system.

  3. Step 3

    Explanation

    We explain what we found and what the options are, in clear language.

  4. Step 4

    Written quote

    We provide a written quote for approval before work begins, with parts and labor listed separately.

  5. Step 5

    Approved work

    We complete the approved work and test the system before leaving.

More services and guides

Common questions about humidifiers and dehumidifiers

Can I use both?
Yes. Many homes use a humidifier in winter and a dehumidifier in summer, because Midwest air swings from one extreme to the other.
Are whole-house systems better than portable units?
They treat the whole home instead of one room, and they run automatically with the HVAC system instead of needing a tank emptied or refilled. Portable units are a reasonable start for a single problem room.
How much does installation cost?
The cost depends on the home size, the existing ductwork and the model chosen. We assess the system, explain what we found and provide a written quote for approval before work begins.

Service area

Areas we serve

We serve Hillside and communities within approximately 30 road miles.

All service areas

Next step

Request humidifier and dehumidifier service

Tell us what is happening at your property. We will arrange a visit, explain what we find and give you a written quote with parts and labor listed separately. Nothing starts until you say go.

Request service Call (708) 673-5633