Kolasina 500M Whole‑House Bypass Evaporative Humidifier designed for homes up to 3,600 sq. ft

500M Whole-House Bypass Evaporative Humidifier With Complete Install KitBalanced whole‑home humidification. Works with existing HVAC forced‑air systems. Maintains ideal indoor humidity, protects hardwood floors, cabinets & furniture. Up to 12 gallons moisture output per day. Suitable for homes up to 3,600 sq.ft. Precise manual humidistat control. Built-in sensor detects indoor relative humidity. Auto turns unit on / off as required. Seasonal RH adjustment to avoid window condensation. Power: 24 VAC, 60 Hz, 0.5 Amp. Runs only when HVAC furnace fan is active. Seasonal damper & Complete install kit. Pre-mounted bypass damper for Winter / Summer switching. Full set of accessories included for installation. 15‑5/8'W ×13'H ×10‑1/4'D. 6-inch bypass duct opening. Low‑maintenance residue‑flush system. Continuous drain flushes residues to cut limescale buildup. Replaceable humidifier pad filters impurities. Scale control insert guards internal components. Rust-proof non-metal water-contact housing. Replace pad yearly to keep stable performance. Pro‑grade furnace‑mount design. Mount on supply plenum or cold-air return. Compatible with upflow & horizontal furnaces. Test mode for quick system inspection. Designed for residential ducted heating systems. All hardware included, no extra parts needed. What's Included. 500M Whole House Humidifier. Manual Humidistat & Humidifier Pad. 24VAC Transformer & Saddle Valve. Installation Template & Manual. (4) 8 x 3/4' Mounting Screws. 6' Round Duct Collar. 6' Bypass Flex Duct (2 ft.). ¼' OD Water Supply Tube (25 ft.). ½' ID Drain Tube (10 ft.). ⅝' Hose Clamp. Current-Sensing Relay. 18/2 Thermostat Wire (10 ft.). (4) Twist-On Wire Nut Connectors. Balanced whole‑home humidification.