What a dehumidifier costs to run in Illinois
Illinois homes use 888 kWh a year on a dehumidifier. Priced on top of the rest of the bill, that costs $94.56 to $94.56 a year across 24 published Illinois plans — a $0.00 gap. Checked September 2, 2026.
Every priced plan, average
| Plan | Per year | vs cheapest | Effective |
|---|---|---|---|
| Residential Single Family With Electric Space Heat Delivery Class(Retail Delivery Service-Unbundled)flat rate · delivery charges only | $13.44 | −$81.12 | 4.5¢ |
| Residential Multi Family With Electric Space Heat Delivery Class(Retail Delivery Service-Unbundled)flat rate · delivery charges only | $16.20 | −$78.36 | 3.6¢ |
| Residential Single Family Without Electric Space Heat Delivery Class(Retail Delivery Service)flat rate · delivery charges only | $24.60 | −$69.96 | 5.5¢ |
| BESH- Residential Single Family With Electric Space Heat Delivery Class(Unbundled)demand charge · delivery charges only | $27.68 | −$66.88 | 6.1¢ |
| BESH- Residential Multi Family With Electric Space Heat Delivery Class(Unbundled)demand charge · delivery charges only | $30.44 | −$64.12 | 5.3¢ |
| Residential Multi Family Without Electric Space Heat Delivery Class(Retail Delivery Service-Unbundled)flat rate · delivery charges only | $31.08 | −$63.48 | 5.1¢ |
| RDS - Residential Multi Family With Electric Space Heat Delivery Classtime-of-use · delivery charges only | $38.76 | −$55.80 | 6.7¢ |
| BESH- Residential Single Family Without Electric Space Heat Delivery Class(Unbundled)demand charge · delivery charges only | $38.84 | −$55.72 | 7.1¢ |
| RDS - Residential Single Family with Electric Space Heat Delivery Classtime-of-use · delivery charges only | $39.96 | −$54.60 | 7.6¢ |
| BESH- Residential Multi Family Without Electric Space Heat Delivery Class(Unbundled)demand charge · delivery charges only | $45.32 | −$49.24 | 6.8¢ |
| RDS - Residential Multi Family Without Electric Space Heat Delivery Classtime-of-use · delivery charges only | $55.20 | −$39.36 | 8.4¢ |
| Electric Heat Residential Income Qualified Senior Citizen - Southern View (Rate 36)time-of-use · income-qualified rate | $80.32 | −$14.24 | 10.1¢ |
| Electric Heat Residential Income Qualified Senior Citizen (Rate 37)time-of-use · income-qualified rate | $80.32 | −$14.24 | 10.1¢ |
| BES - Residential Multi Family With Electric Space Heat Delivery Classtime-of-use · delivery charges only | $83.96 | −$10.60 | 11.8¢ |
| BES - Residential Single Family with Electric Space Heat Delivery Classtime-of-use · delivery charges only | $84.44 | −$10.12 | 12.6¢ |
| Regular Residential- Southern View Senior Citizen (Rate 32)time-of-use · senior citizens only | $85.28 | −$9.28 | 10.7¢ |
| Regular Residential - Senior Citizen (Rate 33)time-of-use · senior citizens only | $85.28 | −$9.28 | 10.7¢ |
| Electric Heat Residential (Rate 34)time-of-use · needs electric heating | $88.96 | −$5.60 | 11.3¢ |
| Electric Heat Residential - Southern View (Rate 35)time-of-use · needs electric heating | $88.96 | −$5.60 | 11.3¢ |
| Regular Residential - Southern View (Rate 31)✓ cheapesttime-of-use | $94.56 | — | 11.9¢ |
| Regular Residential (Rate 30)time-of-use | $94.56 | +$0.00 | 11.9¢ |
| BES - Residential Multi Family Without Electric Space Heat Delivery Classtime-of-use · delivery charges only | $99.68 | +$5.12 | 13.4¢ |
| BES - Residential Single Family Without Electric Space Heat Delivery Classtime-of-use · delivery charges only | $112.20 | +$17.64 | 15.4¢ |
| RDS - Residential Single Family Without Electric Space Heat Delivery Classtime-of-use · delivery charges only | $182.76 | +$88.20 | 23.3¢ |
Cost across usage levels
The cheapest plan at each consumption level, showing whether the ranking holds as usage changes.
- Lighter use — cheapest $38.28 (Regular Residential - Southern View (Rate 31)), dearest $38.28, a $0.00 spread
- Average — cheapest $94.56 (Regular Residential - Southern View (Rate 31)), dearest $94.56, a $0.00 spread
- Heavier use — cheapest $129.96 (Regular Residential (Rate 30)), dearest $129.96
What a dehumidifier costs here
Across 24 plans priced in Illinois, a dehumidifier adds $94.56 to $94.56 a year — $7.88 to $7.88 a month. The median plan puts a dehumidifier at $94.56 a year.
Cheapest for a dehumidifier: Regular Residential - Southern View (Rate 31), City of Springfield, Illinois (Utility Company). Dearest: Regular Residential (Rate 30), City of Springfield, Illinois (Utility Company).
Those 888 kWh are billed at 10.6¢–10.6¢, against a 11.9¢ whole-bill average on the median plan, so on these plans the two rates are close.
What Illinois homes use
EIA's 2020 residential survey found 888 kWh a year across 157 sampled homes that run one, near the national 999 kWh. The middle half spans 359 kWh to 1,221 kWh, so a dehumidifier varies by 862 kWh between one household and another.
Portable and whole-home dehumidifiers. That average covers homes with a dehumidifier — 26% of homes here, against 17% nationally.
That makes a dehumidifier about 11% of the electricity an Illinois home uses. The remaining 7,563 kWh is what a dehumidifier is billed on top of, and on a tiered or time-of-use plan that is what sets the rate it meets.
Light and heavy use of a dehumidifier
A household in the lighter quarter runs a dehumidifier for 359 kWh a year and pays $38.28 on the cheapest plan. One in the heavier quarter runs it for 1,221 kWh and pays $129.96 — $91.68 more for a dehumidifier on the same tariff.
The winner changes with volume: Regular Residential - Southern View (Rate 31) for lighter use, Regular Residential (Rate 30) for heavier.
Limits
A 2020 survey average for Illinois, not a measurement of any one home, priced against the 24 Illinois tariffs WattClear has ingested — not every plan sold there.
New to these terms? The methodology page explains tiered bands, time-of-use periods and fixed charges, and sets out exactly what the rate engine assumes.
Estimate — your actual bill may differ.
Tariff structures from NREL/OpenEI Utility Rate Database (CC0 1.0), retrieved September 2, 2026.
Location resolved through the US Census Bureau Geocoder (Public domain) at 39.7817, -89.6501.