AprilAire Whole-Home Humidifiers

Whole-Home Humidifier Installation in Elgin & the Fox Valley

When it is near 0°F outside, the air inside an Elgin home can drop below 20% relative humidity. That is static shocks, cracked trim, dry sinuses and a house that feels colder than the thermostat says. A whole-home humidifier mounted on your furnace or air handler fixes it for the whole house at once. We are an AprilAire Preferred Partner and install the AprilAire 720 as our standard unit.

  • AprilAire Preferred Partner
  • AprilAire 720: up to 21 gallons a day, homes up to 6,250 sq ft
  • Installed on your existing furnace or air handler
  • Water panel replaced at your fall tune-up on the maintenance plan

Signs Your Home Needs a Whole-Home Humidifier

Dry winter air is not just uncomfortable. It is hard on the house and on the people in it.

  • Static shocks every time you touch a doorknob. Static builds when relative humidity falls below about 30%, which is normal in a Fox Valley home from December through February without a humidifier.
  • Dry skin, chapped lips, nosebleeds and scratchy throats all winter. Dry air pulls moisture from you as fast as it pulls it from the furniture.
  • Hardwood floors gapping and trim pulling away. Wood shrinks as it dries. Floors that open up in January and close in July are living the humidity swing.
  • A piano, guitar or antique furniture that goes out of tune or cracks. Instrument makers ask for 40 to 50% RH for a reason.
  • A hygrometer reading under 30%. An inexpensive digital hygrometer tells you in a day whether the house is too dry.
  • Portable humidifiers in every bedroom. Filling them, cleaning them and wiping the puddle under them gets old. One whole-home unit replaces all of them.
  • The house feels colder than the setpoint. Dry air pulls heat from skin faster, so people turn the thermostat up. Proper humidity lets you feel comfortable at a lower setting.
  • Family members with asthma or allergies who are worse in winter. Dry airways are irritated airways. Humidity in the 40 to 60% range helps.

What We Install

AprilAire humidifiers, sized to the house and matched to how your furnace runs.

Our standard

AprilAire 720

A fan-powered evaporative humidifier with HydroCore technology. It moves up to 21 gallons of moisture a day into the air and is rated for homes up to 6,250 square feet, which covers most Fox Valley houses with room to spare. Its own fan means it does not need a bypass duct. See AprilAire humidifiers.

Bypass

AprilAire 500, 600 and 700

Bypass humidifiers use the furnace blower to push air through the water panel by way of a bypass duct between the supply and return. A good fit when the layout allows and the house is smaller. We install the 500, 600 and 700 series.

Steam

AprilAire 800 and 865

Steam humidifiers make their own moisture and do not depend on the furnace running, which matters in tight, well-insulated homes where the furnace runs less. The 800 and 865 series are the choice for large homes or homes with a heat pump that runs long, cooler cycles.

Set to 40 to 60%

Control and humidistat

Every install includes a control set to the 40 to 60% RH target, with guidance to run lower on the coldest days so windows do not sweat. We wire it to run with the furnace or air handler so the moisture is carried through the ducts.

Included

Water, drain and power

A proper water connection, a drain line for the overflow on evaporative models, and 24-volt or line-voltage wiring depending on the model. Nothing is left dripping into the furnace cabinet.

Healthy Air

Pair it with filtration

Humidity, filtration and dehumidification work together. Many of our humidifier installs go in alongside an AprilAire air purifier on the same furnace. See AprilAire Healthy Air products.

Replacing an Old Unit?

A lot of Fox Valley furnaces have a humidifier that has not worked in years. Here is what changes when we replace it.

Old bypass humidifiers fail quietly. The water panel scales over and stops absorbing, the solenoid sticks, the saddle valve clogs, or somebody shut the bypass damper one summer and never opened it again. Many homeowners do not realize the humidifier is dead until the static and the nosebleeds come back.

When we replace a unit, we start by checking whether the location, the water line and the drain are worth reusing. Often they are not. Old saddle valves leak and clog; we prefer a proper shutoff. A bypass duct that was cut too small or runs the wrong direction gets corrected or eliminated by moving to the fan-powered 720. The old unit comes off, the plenum opening is sealed or reused, and the new humidifier is mounted, plumbed, wired and set up as a new install. If the old one just needs a water panel or a valve, we will say so. See humidifier repair.

If the furnace itself is due, do the humidifier with the furnace replacement so the new plenum is cut once.

How the Installation Day Goes

Most humidifier installs take two to four hours, and the furnace is only off for part of that.

1. Sizing and placement. We confirm the square footage, how tight the house is, whether you have a furnace or a heat pump air handler, and where the supply and return plenums allow a mount. That decides the model and whether a bypass or fan-powered unit makes sense.

2. Water supply. We tap a nearby cold water line with a proper shutoff and run the supply tubing to the humidifier. Water quality matters; very hard water scales the panel faster, and we will tell you if that is your situation.

3. Mounting. The humidifier is mounted on the supply or return plenum per the model’s instructions, with the opening cut cleanly and sealed. Bypass models get a bypass duct with a damper you can close for summer.

4. Drain. Evaporative humidifiers pass more water than they evaporate. The drain runs to a floor drain or the furnace condensate pump so nothing ends up on the basement floor.

5. Wiring and control. The unit is wired to run only when the blower runs, and the control is mounted where it reads the house, not the duct. If your smart thermostat can control the humidifier, we set that up.

6. Start-up and walk-through. We run it, confirm water flow and drain, set the target humidity and show you how to adjust it on cold days, when to change the water panel, and how to shut it down for summer.

What a Humidifier Installation Costs

A flat, written price for the unit, the installation and the first water panel.

Whole-home humidifier installs are quoted as a flat price by model. The quote includes the humidifier, the water and drain connections, mounting, wiring, the control and start-up. Steam models cost more than evaporative models because of the electrical work and the unit itself. We will tell you which one your house actually needs; a 720 covers most homes.

The only ongoing cost is the water panel, which is replaced once per heating season. On the $240 semi-annual maintenance plan we replace it at the fall furnace tune-up so you never think about it. Off the plan, it is a small flat-rate item on any service visit.

If a humidifier is part of a bigger project, such as a new furnace or a full AprilAire Healthy Air package, it goes on the same written quote and can be financed. You can prequalify in about 2 minutes with no impact to your credit score.

Why Whole-Home Humidity Matters in Northern Illinois

Our winters are long, cold and dry. The house pays for it.

AprilAire whole-home humidifier

The AprilAire whole-home humidifier we install on furnaces and air handlers across the Fox Valley.

  • Design temperatures near 0°F mean furnaces run from November through March, and every cycle dries the air further
  • Outdoor air at 0°F holds almost no moisture; heated to 70°F it lands near 10 to 15% RH indoors
  • Basement furnaces in 1960s to 2000s split-levels and ranches carry that dry air to every room
  • Static, cracked trim, nosebleeds and a house that feels colder than the setpoint are the results
  • The target is 40 to 60% RH, adjusted lower on the coldest days
  • Summers run humid, so the humidifier is shut off and the air conditioner or a dehumidifier takes over

We are an AprilAire Preferred Partner and install the 720, the 500, 600 and 700 bypass series and the 800 and 865 steam series on any brand of furnace or air handler. See AprilAire for the lineup.

We Replace the Water Panel at Your Fall Tune-Up

Humidifiers only need one thing each year: a fresh water panel before heating season. On the Rest Assured semi-annual maintenance plan, that happens at your fall furnace tune-up, along with a check of the solenoid, drain and control. The plan is $240 a year for a fall furnace tune-up and a spring AC or heat pump tune-up, each up to a $130 value, plus one free business-hours service call, priority scheduling and 5% off services. Up to $390 in services for $240.

Want the whole picture? AprilAire’s Healthy Air approach pairs a humidifier with a media air purifier and, for damp basements, a dehumidifier. We install all three on your existing system. See AprilAire Healthy Air products and indoor air quality.

Whole-Home Humidifier Installation FAQs

What humidity level should I keep my house at in winter?

Aim for 40 to 60% relative humidity for comfort and health. On the coldest days near 0°F, turn it down toward the low end so the windows do not sweat; condensation on the glass means the setting is too high for that outdoor temperature.

What is the AprilAire 720?

A fan-powered evaporative whole-home humidifier with HydroCore technology. It delivers up to 21 gallons of moisture per day and is rated for homes up to 6,250 square feet. It is the standard unit we install. See AprilAire humidifiers.

Bypass, fan-powered or steam: which humidifier do I need?

Fan-powered evaporative units like the 720 fit most homes. Bypass units suit smaller homes where the furnace runs often. Steam units are for large or very tight homes, or homes with a heat pump that runs long, cooler cycles, because they make moisture without depending on furnace heat.

How long does humidifier installation take?

Usually two to four hours, including the water line, drain, mounting, wiring and start-up. Steam units take longer because of the electrical work.

Can a humidifier be installed on a heat pump air handler?

Yes. Evaporative units work on an air handler, though the cooler supply air from a heat pump evaporates less water than a gas furnace does. In heat pump homes we often recommend the fan-powered 720 or a steam model.

How often does the water panel need to be changed?

Once per heating season. On the maintenance plan we replace it at the fall furnace tune-up. Very hard water can scale a panel faster; we will tell you if your water is a concern.

Will a whole-home humidifier cause mold or window condensation?

Not when it is set correctly. Condensation on windows means the humidity is too high for the outdoor temperature; lower the setting on cold days. We set the control to the 40 to 60% range and show you how to adjust it.

Does a whole-home humidifier use a lot of water?

An evaporative humidifier passes more water than it evaporates, and the excess goes down the drain. The amount is modest compared with household use, and the drain is part of every install so nothing leaks into the furnace.

Can I run the humidifier in summer?

No. Shut it off and close the bypass damper if you have one when cooling season starts. Summer air in the Fox Valley is already humid, and running the humidifier then only adds moisture the air conditioner has to remove.

Will a humidifier help my hardwood floors and trim?

Yes. Wood shrinks as it dries and swells as it absorbs moisture. Holding the house near 40% RH through the winter keeps floors, trim, doors and cabinets from gapping and cracking.

Can my smart thermostat control the humidifier?

Many can. ecobee and several Honeywell Home models have a humidifier terminal, and we wire and configure it at the install. See smart thermostat installation.

Do you replace old or broken whole-home humidifiers?

Yes. We remove the old unit, correct or eliminate a poor bypass duct, replace a leaking saddle valve with a proper shutoff, and install the new humidifier as a fresh install. If the old one only needs a part, we will tell you. See humidifier repair.

Is there a rebate for a whole-home humidifier?

We do not claim a utility rebate on humidifiers. Your quote is a flat written price, and larger indoor air quality projects can be financed.

Stop the Static. Get a Written Quote.

Tell us your square footage and what heats the house, and we will recommend a model and quote it flat-rate. Most installs happen within days.

Request a free quote or contact us with questions about AprilAire humidifiers.

AprilAire and Healthy Air System are trademarks of Research Products Corporation. Rest Assured HVAC LLC is an independent AprilAire Preferred Partner.