If your Pittsburgh basement smells musty in July, your finished basement playroom feels clammy in August, your hardwood floors swell in summer, or you have a chronic mold problem on stored boxes or basement walls, the cause is almost always humidity. Pittsburgh sits in a river valley with three large rivers and a long humid season from May through September. Outdoor dewpoints often run in the 60s and 70s for weeks at a time. Inside an older home, that moisture finds its way into basements, crawlspaces, and finished lower levels and never really leaves.

A whole-home dehumidifier solves it. Mounted in your basement or your HVAC system, it pulls moisture out of the air actively, drains it away, and holds your home at 45 to 55 percent relative humidity all summer long. The basement smell goes away. The clammy feeling goes away. The mold stops growing. The cool air from your AC actually feels cool instead of cold and wet.

Why your AC alone is not enough

Many homeowners think running the air conditioner takes care of humidity. It does some, but for a Pittsburgh summer it is usually not enough.

Air conditioners are sized for temperature, not humidity. An AC removes moisture as a side effect of cooling air. When the temperature is comfortable, the AC turns off. But Pittsburgh has plenty of mild humid days, 70 degrees and raining, where the AC barely runs but the humidity is at 75 percent. Your basement stays damp.

Newer high-efficiency ACs cycle shorter. A modern variable-speed AC runs at lower output for longer, which is great for energy use but worse for dehumidification because air does not spend as much time on a cold coil.

Basement air is below grade. Basements are colder than upstairs, so warm humid air settles down and condenses on cool basement walls and floors. Your upstairs AC does almost nothing for basement humidity.

Crawlspaces and unfinished basements vent moisture upward. Moisture in a damp crawlspace migrates into the rest of the house through floors and walls.

A whole-home dehumidifier addresses humidity independently of cooling. It runs when the air is humid, regardless of temperature.

Aprilaire whole-home dehumidifier models

We install Aprilaire dehumidifiers, the most reliable and well-supported line on the market.

Aprilaire 1820 / 1830 / 1850 / 1870

The Aprilaire line ranges from 70 pints per day up to 130 pints per day capacity. Sizing depends on the square footage we are treating, the moisture load, and whether we are dehumidifying a basement only or the whole home.

• 70 pints (1820): small homes, basement-only dehumidification.
• 95 pints (1830 or 1850): typical Pittsburgh single-family home with a damp basement.
• 130 pints (1870): large homes, very damp basements, whole-home dehumidification.

Installation options

We install whole-home dehumidifiers in two ways depending on what you need.

Free-standing basement unit

The dehumidifier sits in the basement, pulls air in from the basement directly, and discharges dry air back out. Drain runs to your existing floor drain, sump pump, or condensate pump.

• Best for: basement-only humidity problems, finished basements, crawlspaces.
• Install time: half day.
• Visible: yes, but the unit is reasonably quiet and unobtrusive.

HVAC-integrated unit

The dehumidifier ties into your existing ductwork. It pulls air from one duct, dries it, and discharges it back into another, so it dehumidifies your whole home through the existing HVAC airflow.

• Best for: whole-home humidity problems, homes where the basement is just one symptom.
• Install time: half day to full day.
• Visible: less so, the unit lives near the HVAC equipment.

We size and recommend during the in-home consult. For most Pittsburgh homes with a problem basement, we start with a basement free-standing unit. For homes where summer humidity is a problem throughout the house, we go to a ducted install.

How a Wahl dehumidifier visit works

1. Phone intake. We ask about your symptoms (basement smell, mold concerns, clammy air, swelling floors), the age of the home, and what your basement is like.
2. In-home assessment. A technician measures current humidity throughout the home, looks at your basement (foundation, walls, any standing water), checks your HVAC equipment, and identifies any moisture sources we can fix at the same time (leaking pipes, missing vapor barriers, broken downspouts feeding the foundation).
3. Options on paper. Three to four options with prices. Standard rate and member rate side by side.
4. Install. Half day to full day.
5. Walkthrough. We show you the unit, the drain, the control, and what humidity range to set.

Setting the target humidity

For Pittsburgh summers, we set most dehumidifiers between 45 and 55 percent relative humidity. That range:

• Eliminates the musty smell.
• Prevents mold growth on basement walls, stored items, and fabrics.
• Feels comfortable (low enough that you do not feel clammy, high enough that you do not feel dried out).
• Is achievable in a typical Pittsburgh basement without overworking the unit.

We start at 50 percent on most installs and adjust based on how the home responds.

Maintenance

Whole-home dehumidifiers are low-maintenance.

• Annual filter change. The internal filter catches dust. Quick swap.
• Drain check. Make sure water is draining freely, no clogs.
• Coil cleaning every 2 to 3 years. We do this during HVAC service for Wahl Club members.
• Service life. Most units run 8 to 12 years before replacement.

Pricing

Flat-rate install pricing. Member and standard rates side by side. Financing through GoodLeap, Synchrony, Wells Fargo, and EasyPay.