Lasko Furnace Humidifier Manual

The Lasko Furnace Humidifier is a high-efficiency humidification system designed for home furnace integration, featuring automatic humidity control, adjustable output settings, easy installation, low maintenance design, and energy-efficient operation. Compatible with most forced-air furnace systems, it helps maintain optimal indoor humidity levels for improved comfort and health. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Furnace 7. Operation and Maintenance 8. Seasonal Settings 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Humidistat control panel, water distribution tray, evaporator pad, bypass damper, drain connection, and mounting brackets.

Feature	Description
Humidistat Control	Automatic humidity regulation with manual override
Evaporator Pad	High-capacity moisture absorption media
Bypass Damper	Adjustable airflow control for optimal performance
Water Distribution	Even water flow across evaporator pad
Drain Connection	Standard 3/4-inch drain outlet
Mounting Brackets	Easy installation on furnace ductwork
LED Indicators	Power, operation, and maintenance status lights
Manual Override	Direct control mode for specific humidity needs
Auto Shut-off	Safety feature when water supply is interrupted
Seasonal Settings	Pre-programmed modes for different climate conditions

Installation

Unpack and inspect all components. Ensure furnace is turned off before beginning installation.

Select mounting location: Choose warm air supply duct near furnace.
Install mounting brackets: Secure to ductwork using provided hardware.
Connect water supply: Use 1/4-inch copper tubing to water source with saddle valve.
Connect drain line: Attach 3/4-inch hose to drain connection and route to floor drain.
Install bypass duct: Connect between supply and return air ducts.
Wire humidistat: Connect to 24V furnace transformer following wiring diagram.

WARNING! Turn off furnace power before installation. Ensure all connections are water-tight.

First-Time Setup

After installation, power on furnace and humidifier system.

Set humidity level: Adjust humidistat to desired setting (30-50% recommended).
Test operation: Run furnace to verify humidifier activates properly.
Check water flow: Ensure even distribution across evaporator pad.
Verify drainage: Confirm proper water flow to drain.
Set seasonal mode: Select appropriate setting for current climate conditions.

CAUTION! Do not set humidity above 50% to prevent condensation issues.

Specifications

Capacity: Up to 1,800 square feet coverage
Humidity Range: 15% to 60% relative humidity
Water Consumption: 0.5 to 3.0 gallons per day
Power Requirements: 24V AC from furnace transformer
Water Connection: 1/4-inch copper tubing
Drain Connection: 3/4-inch hose barb
Dimensions: 16" x 10" x 8"
Weight: 8.5 pounds
Operating Temperature: 40°F to 120°F
Warranty: 3-year limited warranty

Controls and Settings

Access control panel via humidistat mounted on return air duct or wall.

Control Panel: Power switch, humidity level dial, manual override button, seasonal mode selector, LED status indicators.

Humidity Settings: Adjustable from 15% to 60% RH. Seasonal Modes: WINTER (high output), SPRING/FALL (medium), SUMMER (off/low). Manual Override: Direct control bypassing automatic humidistat. LED Indicators: Green (power), Yellow (operating), Red (maintenance required).

Connecting to Furnace

Compatible with most forced-air gas, oil, or electric furnaces.

Turn off furnace power at circuit breaker.
Mount humidifier on warm air supply duct.
Connect bypass duct between supply and return air ducts.
Wire to 24V furnace transformer following color-coded connections.
Connect humidistat to control board or mount on return air duct.
Restore power and test system operation.

Tip: Ensure bypass damper is adjusted for proper airflow before finalizing installation.

Operation and Maintenance

Automatic operation with seasonal maintenance requirements.

Daily Operation: System runs automatically when furnace operates and humidity is below set point.
Monthly Check: Inspect evaporator pad for mineral buildup.
Seasonal Startup: Replace evaporator pad at beginning of heating season.
Water Distribution: Clean distribution tray to prevent clogging.
Drain Line: Flush periodically to remove sediment.
Humidistat Calibration: Verify accuracy annually with hygrometer.
Winter Shutdown: Turn off water supply and power when not in use during warm months.

WARNING! Always turn off power and water supply before performing maintenance.

Accessibility Features

Easy-access design for maintenance and filter replacement. Clear visual indicators for operation status and maintenance needs.

Care & Cleaning

Turn off power and water supply before cleaning. Use mild detergent and soft brush for cleaning components.

CAUTION! Do not use harsh chemicals or abrasive cleaners. Ensure unit is completely dry before restoring power.

Regulatory Information

UL Listed for residential use. Complies with ASHRAE standards for humidification equipment. Energy Star certified for efficient operation. Copyright © 2024 Lasko Products LLC. For support, visit www.laskoproducts.com or contact 1-800-233-0268.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No humidity output	Power/water supply	Check power connection; verify water valve is open; inspect evaporator pad.
Water leakage	Loose connections	Tighten all water connections; check drain line for proper routing.
Poor performance	Clogged distribution	Clean water distribution tray; replace evaporator pad.
Unit not activating	Humidistat setting	Adjust humidistat to higher setting; check furnace operation.
Mineral buildup	Hard water	Replace evaporator pad more frequently; consider water treatment.
Musty odor	Dirty components	Clean evaporator pad and housing; ensure proper drainage.

Reset: Turn power off for 30 seconds, then restore.

Service: 1-800-233-0268; www.laskoproducts.com