Waykar CTH30C 30-Pint Dehumidifier: problems, parts and running costs

Checked: 2026-10-19

Summary

The CTH30C’s main drawbacks are a 30-pint rating measured at maximum conditions (95°F, 90% RH) that drops at typical room conditions, conflicting and unverified noise claims (35 dB versus 32 dB), and a small 0.39-gallon tank that needs frequent emptying unless you use the included drain hose. There are no consumables beyond electricity — the filter is washable and reusable — and the 1-year warranty extends to 2 years on registration. It is a reasonable buy at $149.99 or below; above $180 the value weakens.

Common problems and fixes

Noise claims conflict — Waykar says 35 dB and Kohls says 32 dB, and neither figure is independently verified; treat both as manufacturer claims, not measurements. [1][3]
Small 0.39-gallon tank — needs frequent emptying without the hose; the included 3.3 ft gravity drain hose is the practical fix for unattended operation. [1][2]
Thin exact-model owner history — Reddit discussion covers the larger 120-pint and 125-pint Waykar models, not the CTH30C, so the absence of complaints is not strong evidence of reliability. [13][14]
R290 refrigerant ventilation requirement — per the Lowes listing, the unit needs a well-ventilated room exceeding 5 m². [4]
Dimensions and weight not published — Waykar does not list them; the 15.2 x 11.02 x 7.68 in figures come from user-contributed Best Buy Q&A answers. [10]

Parts and consumables

Yearly running cost

There are no consumables: the filter is washable and reusable, and there are no pods, bags or subscriptions. Electricity is the only running cost — a 165 W draw — but the sources give no usage hours or electricity rates, so a yearly dollar figure is not computable. Not enough data.

When it is a good buy

At $149.99 (Best Buy, Home Depot; 2026-10) the CTH30C is a reasonable compact 30-pint option with ENERGY STAR 2025, auto defrost and hose drainage. [9][11]
Waykar’s own site lists it at $155.99 on sale from $199.99 (2026-10); Conservation Mart has it at $144.99 with a two-unit minimum; Kohls was out of stock at the time of check. [1][12][3]
In the $150–$180 range, compare BLACK+DECKER, Honeywell and Inofia 30-pint models with larger tanks and deeper review histories. [7]
Above $180 the value weakens, given the lack of independent test data and the thin exact-model owner history. [7]
The Waykar PD160B (34-pint sibling) is the better choice when you want an independently tested compact unit: RTINGS scored it 6.9/10 and named it the best bedroom dehumidifier of 2026. [15][16]