The smallest available horizontal gas furnace on the market is typically from the Goodman brand, specifically the Goodman GM9C960303AN. This compact unit offers a 30,000 BTU output and can be installed in both upflow and horizontal orientations, making it a versatile choice for tight spaces.
What is the Smallest Available Horizontal Gas Furnace?
The Goodman GM9C960303AN is the smallest horizontal gas furnace available, with the following key specifications:
- Brand and Model: Goodman GM9C960303AN
- BTU Output: 30,000 BTU
- Dimensions: Approximately 14 inches in width for smaller Goodman furnace models
- Efficiency: 96% AFUE (Annual Fuel Utilization Efficiency)
- Configuration: Can be installed in both upflow and horizontal orientations
How to Install a Horizontal Gas Furnace Under a Stairwell?
Installing a horizontal gas furnace under a stairwell is feasible, but it requires careful planning and adherence to safety and installation guidelines. Here are the key considerations:
Installation Process
- Clearance: Ensure there is sufficient clearance around the furnace for proper ventilation, maintenance, and access. Typically, 3-4 feet of clearance is recommended on all sides.
- Venting: The furnace must be vented properly using plastic/PVC flue venting, which may require additional planning to ensure the venting system fits within the stairwell space.
- Gas Line: The gas line must be properly sized and installed to reach the furnace location without any leaks or obstructions.
- Electrical: Ensure the electrical connections are made safely and according to the manufacturer’s instructions.
- Drain Kit: If installed horizontally, a drain kit may be required to manage condensate.
Necessary Modifications
- Venting Path: The venting path may need to be modified to accommodate the stairwell’s structural constraints.
- Access Panel: An access panel may need to be installed to facilitate maintenance and repairs.
Potential Challenges
- Space Constraints: Limited space under a stairwell can make installation and maintenance more challenging.
- Venting Obstructions: Ensuring proper venting without obstructions can be difficult in confined spaces.
- Accessibility: Ensuring easy access for maintenance and repairs is crucial.
What are the Clearance Requirements for a Small Horizontal Gas Furnace?
The clearance requirements for a small horizontal gas furnace include:
- Side Clearance: Typically 12-18 inches on each side to allow for proper air flow and maintenance access.
- Rear Clearance: At least 6 inches to ensure proper venting and electrical connections.
- Front Clearance: At least 24-36 inches to allow for easy access and maintenance.
Additionally, the furnace must have adequate ventilation and access for maintenance and repairs, including access to the filter, blower, and heat exchanger.
What are the Technical Specifications for a Small Horizontal Gas Furnace?
The technical specifications for a small horizontal gas furnace include:
Gas Line Requirements
- The gas line must be sized according to the furnace’s BTU rating and the distance from the gas supply.
- The line should be leak-tested before connecting it to the furnace.
Electrical Specifications
- The furnace requires a dedicated 120V electrical circuit.
- The electrical connections must be made according to the manufacturer’s instructions and local electrical codes.
Venting Options
- High-efficiency furnaces require plastic/PVC flue venting.
- The venting system must be properly sized and installed to ensure safe and efficient operation.
How to Determine the Appropriate Size and Capacity for a Small Horizontal Gas Furnace?
To determine the appropriate size and capacity of a small horizontal gas furnace, consider the following factors:
- Square Footage: Use a BTU calculator or consult with an HVAC professional to determine the required BTU output based on the square footage of the space to be heated.
- Insulation and Climate: Factors such as insulation quality, window size, and local climate also influence the required BTU output.
- Efficiency: Higher efficiency furnaces (like 96% AFUE) can provide more heat with less energy input.
What are the Costs Associated with Purchasing and Installing a Small Horizontal Gas Furnace?
The costs associated with purchasing and installing a small horizontal gas furnace include:
- Unit Cost: The cost of a small horizontal gas furnace can range from approximately $1,000 to $2,500, depending on the model and features.
- Installation Labor: Installation costs can vary widely but typically range from $500 to $2,000, depending on the complexity of the installation and local labor rates.
- Additional Materials or Tools: Additional costs may include venting materials, gas line materials, electrical components, and any necessary modifications to the installation site.
Reference:
1. Goodman Horizontal Furnaces – AC Wholesalers
2. Horizontal Gas Furnaces – eComfort
3. 30,000 BTU 96% AFUE Two Stage Goodman Gas Furnace – Online Supply
