Whole-House Dehumidifier Installation
The Indiana summer humidity problem
Central Indiana sits in one of the more humid US climates. Indianapolis NWS data shows July-August dew points routinely in the 65-72°F range — high enough that air at 75°F holds 55-70% relative humidity even before any indoor moisture sources (cooking, showering, exhaling) are added.
AC dehumidifies as a side effect of cooling: warm humid air passes over the cold evaporator coil, water condenses out, drains away. Works great when the AC is running. But on mild Indiana days when outdoor temp is 70-78°F, the AC barely cycles — your house stays cool but humidity creeps up. Properly-sized AC actually makes this worse, because it cools the house with shorter run times.
End result for many Boone County homes: thermostat reads 72°F, house feels sticky, basement smells musty, you're miserable.
How whole-house dehumidifiers fix it
Independent operation from cooling demand. The dehumidifier has its own humidistat, runs based on humidity setpoint regardless of temperature. Pulls moisture out of the air, drains it to a floor drain or condensate pump, returns dry air to the supply duct.
Typical setup:
- Equipment: Aprilaire 1830 (70 pints/day, ~2,200 sq ft coverage) or Aprilaire 1850 (95 pints/day, ~3,800 sq ft coverage)
- Mounting: Suspended from floor joists in basement or utility room, or platform-mounted
- Ductwork: Connection to existing supply or return air stream (we determine optimal configuration during in-home assessment)
- Drain: Gravity drain to nearest floor drain, or small condensate pump if no gravity option
- Power: 110V outlet within 6 feet
- Control: Remote humidistat in the main living area, or integration with smart thermostat
Aprilaire 1830 vs 1850 — which one?
| Aprilaire 1830 | Aprilaire 1850 | |
|---|---|---|
| Capacity | 70 pints/day | 95 pints/day |
| Coverage | Up to 2,200 sq ft | Up to 3,800 sq ft |
| Installed price | $1,895-$2,295 | $2,295-$2,695 |
| Boone County fit | Most Lebanon, Whitestown homes | Larger Zionsville, Carmel, Westfield homes |
We size based on a Manual J-style load calc that accounts for square footage, occupancy, basement conditions, and the existing home's air leakage. Oversizing isn't a problem (the unit just cycles less), but undersizing can't pull enough moisture during peak humidity weeks.
Why portable dehumidifiers don't solve this
The $300-$500 portable units at Lowe's and Home Depot work fine for a single room or a damp basement closet. They don't work for whole-home applications because:
- Capacity is limited (most portables: 30-50 pints/day, vs 70-95 for whole-home)
- They only dehumidify the air they're in — humid air from other parts of the house keeps creeping in
- They run continuously during humid weather, consuming 700-1,200W constantly
- You have to manually empty water tanks or run hoses
- Noise level (40-55 dB) is acceptable in a basement but disruptive in living spaces
If your problem is a damp finished basement only, a portable dedicated unit is fine and saves you $1,500. If the whole house feels sticky, you need whole-house equipment.
What's in the installed price
- Aprilaire equipment (1830 or 1850 based on Manual J sizing)
- Install labor (6-8 hours typical)
- Ductwork integration (supply or return tie-in with proper damping)
- Condensate routing (gravity drain or condensate pump as needed)
- Electrical work (110V circuit verification, GFCI if needed)
- Remote humidistat with main-floor mounting
- Test cycle and humidistat calibration
- 5-year parts (Aprilaire) / 2-year labor (Hoosier Daddy) warranty
Boone County application notes
- Pre-1980 Lebanon downtown core homes: high infiltration brings outdoor humidity in constantly. Dehumidifier sizing usually needs to be one tier up from sq-ft tables suggest.
- Newer Walker Farms / Anson / Holliday Farms construction: tight envelopes — properly sized standard tier works well. Sometimes ERV pairing makes sense.
- Finished basements: dehumidifier almost always pays off here. The basement is the moisture source that drives whole-home humidity problems.
- Crawl space encapsulation projects: dehumidification in the crawl space itself is often more cost-effective than whole-home equipment if the crawl is your moisture source.
Frequently Asked Questions
Do I need a whole-house dehumidifier in Indiana?
If your home runs above 60% RH consistently in July-August, yes. Indiana summer dew points routinely exceed comfort range.
How much does installation cost in Lebanon?
$1,895-$2,695 installed depending on capacity needed.
Why doesn't my AC dehumidify enough?
AC dehumidifies only when actively cooling. On mild Indiana days, AC runs short — humidity creeps up.
What's the right humidity target?
45-50% year-round. Above 55-60% in summer creates problems.
Where does the dehumidifier install?
Suspended near the air handler with ductwork integration. 6-8 hours install time.