How much water does a whole-house humidifier typically use in one day? (1500-2000 sf home) 0-2 gallons 11% 2-5 gallons 22% 15-20 gallons 11% Not sure 55% Get Free Quotes Today! Question: How much water does a whole-house humidifier typically use in one day? (1500-2000 sf home) Top Answer (55% of 9 votes): Not sure. Answer: 2-5 gallons Explanation: This answer depends on how dry your air is. Arizona's Best Heating & AC, Inc. Answer: Not sure Explanation: based on many factors HVAC and More Answer: Not sure Explanation: . Alpha Cleaning Solutions, LLC Get Free Quotes Today! Find Local Pros Free Whole House Humidifier Installation Cost Estimates Related Questions How Much Does It Cost to Replace Humidifier on Furnace? Can I install a whole house humidifier without a forced air system?Top answer: In some cases Do I need a permit to install a central humidifier?Top answer: In some cases Who can install a whole house humidifier? Can I install a whole house humidifier if I have a heat pump?Top answer: In most cases