Dehumidifier sizing Last reviewed June 30, 2026
What Size Dehumidifier for a 1,500 Sq Ft Space?
By the WhatSize editorial team 5 min read Standards-reviewed
For 1,500 sq ft with moderate dampness, a 35-pint dehumidifier may work, but 50 pints is recommended for very damp conditions or basements.
Sizing a Dehumidifier for 1,500 Sq Ft
At 1,500 sq ft, you're at the upper range of what a 35-pint dehumidifier can handle comfortably. The AHAM standard recommends about 26 pints of daily moisture removal at moderate dampness for a space this size, which a 35-pint unit can achieve.
For most 1,500 sq ft spaces, a 50-pint dehumidifier provides better performance — it removes moisture faster, runs fewer cycles, and handles humidity spikes more effectively.
Top picks for this size
These Amazon-available picks meet the calculated spec. For region-specific or licensed contractor-installed options, consult a local professional. See our Disclaimers.
35 vs 50 Pints: Which to Choose?
- Choose 35 pints if: the space is above-ground, well-insulated, with moderate humidity and good airflow
- Choose 50 pints if: the space is a basement, poorly insulated, has high ceilings, or includes a kitchen/laundry area
Frequently asked questions
What size dehumidifier for 1,500 sq ft?
It depends. If the apartment has an open floor plan with good air circulation, a 35-pint dehumidifier can work. However, a 50-pint unit is a safer choice for whole-apartment coverage.
How long does it take to dehumidify a 1,500 sq ft space?
With a properly sized 50-pint dehumidifier, you should see humidity drop from 70% to 55% within 4-8 hours of continuous operation.
Is it better to get one large or two small dehumidifiers for 1,500 sq ft?
One properly sized unit is almost always better. It's more energy-efficient, easier to maintain, and provides consistent humidity control.
You might also need
More dehumidifier sizing guides
- What Size Dehumidifier for a 500 Sq Ft Room?
- What Size Dehumidifier for a 1,000 Sq Ft Space?
- What Size Dehumidifier for a 2,000 Sq Ft Space?
- What Size Dehumidifier for a Basement?
- What Size Dehumidifier for a Bedroom?
- What Size Dehumidifier for a Crawl Space?
- 50-Pint vs 70-Pint Dehumidifier: Which Size Do You Need?
- What Size Dehumidifier for a Grow Room? Tent Sizing Guide
- What Temperature Does a Dehumidifier Stop Working? Winter Guide
Still choosing between sizes? Compare: 50 vs 70 pint