Should my central humidifier be connected to hot or cold water? Hot water 25% Cold water 25% There is no significant difference. 12% Not sure 37% Get Free Quotes Today! Question: Should my central humidifier be connected to hot or cold water? Top Answer (37% of 32 votes): Not sure. Answer: Cold water Explanation: yes HVAC Philly Inc Answer: Hot water Explanation: Avoid installing on the cold side M&D Home Improvement Answer: There is no significant difference. Explanation: I have seen it both ways. Arizona's Best Heating & AC, Inc. Get Free Quotes From Local Pros ProMatcher Answer: There is no significant difference. Explanation: In both cases there will be excess, if not controlled. CH Argus Answer: Cold water Explanation: water would cool by the time it reaches the heater HVAC and More Answer: Not sure Explanation: . Alpha Cleaning Solutions, LLC Get Free Quotes From Local Pros ProMatcher Answer: There is no significant difference. Explanation: This wont make an impact. Company name here 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