Hardy Wood Furnace H2 Manual

The Hardy Wood Furnace H2 is a high-efficiency outdoor wood burning furnace designed for whole-home heating. This heavy-duty unit features a large firebox, stainless steel construction, automatic draft control, and compatibility with existing HVAC systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Stainless steel firebox, Automatic draft control, Heat exchanger, Water jacket, Chimney system, Control panel.

Installation Requirements

Proper installation is critical for safety and performance. Follow all local codes and regulations.

1. Location: Install outdoors with proper clearance from structures (minimum 10 feet).
2. Foundation: Level concrete pad required (4" minimum thickness).
3. Water Connections: Use approved PEX or copper piping with proper insulation.
4. Electrical: 120V AC power required for controls and circulator pump.
5. Chimney: Install according to manufacturer specifications with proper height.

WARNING! Furnace is extremely heavy; use proper lifting equipment. Professional installation recommended.

First-Time Setup

Complete installation before initial startup and testing.

1. Fill System: Add water and antifreeze mixture to proper level.
2. Pressure Test: Check for leaks at all connections.
3. Electrical: Connect to 120V power source.
4. Initial Firing: Load with small amount of dry wood and start fire.
5. System Check: Verify circulator pump operation and temperature controls.

CAUTION! Never operate with empty water jacket. Ensure proper water level before each use.

Specifications

• Heating Capacity: Up to 3,500 square feet
• Firebox Size: 30" W x 24" D x 36" H
• Water Capacity: 55 gallons
• Maximum Water Temperature: 200°F
• Chimney Size: 8-inch diameter
• Fuel Type: Seasoned hardwoods only
• Burn Time: 8-12 hours per load
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Weight: 850 pounds (empty)

Controls and Operation

Control Panel: Temperature gauge, Draft control dial, Power indicator, Reset button.

Operation: Load wood through front door, adjust draft control for desired burn rate, monitor temperature gauge.

Temperature Settings: LOW (140-160°F), MEDIUM (160-180°F), HIGH (180-200°F). Draft Control: Adjusts air intake for burn rate. Water Temperature: Maintain between 160-180°F for optimal efficiency. Loading: Fill firebox leaving 6" clearance from top.

Maintenance Procedures

Regular maintenance ensures long service life and safe operation.

1. Daily: Check water level and pressure.
2. Weekly: Remove ashes from firebox and ash pan.
3. Monthly: Inspect door gaskets and seals.
4. Seasonally: Clean heat exchanger and chimney.
5. Annually: Complete system inspection and component testing.

Tip: Keep maintenance log to track service dates and repairs.

Fuel Requirements

Use only properly seasoned hardwoods for optimal performance and safety.

1. Wood Type: Oak, maple, hickory, ash (seasoned 6-12 months)
2. Moisture Content: Below 20% for efficient burning
3. Size: Split logs 16-18 inches long
4. Storage: Keep wood dry and covered
5. Loading: Do not overfill firebox

WARNING! Never use treated wood, plywood, or construction debris. These materials release toxic fumes.

Safety Features

Pressure Relief Valve: Automatically releases pressure if system exceeds 30 PSI. High Limit Switch: Shuts down system if water temperature exceeds 200°F. Door Safety Latch: Prevents accidental opening during operation. Grounding: Proper electrical grounding required.

Care & Cleaning

Regular cleaning maintains efficiency and prevents creosote buildup.

CAUTION! Allow furnace to cool completely before cleaning. Wear protective gloves and eyewear.

Regulatory Information

UL Certified to UL 391 standards. EPA Phase II compliant for emissions. Meets ASTM E2618 for safety testing. For support, visit www.hardyheater.com or contact 1-800-542-7394. Copyright © 2025 Hardy Manufacturing. All rights reserved.

Troubleshooting

Reset: Press reset button on control panel if high limit trips.

Service: 1-800-542-7394; www.hardyheater.com