AAON (AAON) Q4 2023: Data Center Bookings Hit 20% of Orders, Driving Capacity Investments

February 29, 2024 | By EarningsIQ Research

AAON’s Q4 demonstrated robust top-line and margin gains, underpinned by a surge in data center demand and operational integration across sites. The company’s forward strategy is anchored in capacity expansion and product innovation, with a clear focus on capturing secular tailwinds in decarbonization and electrification. Management signals a measured approach for 2024, anticipating slower growth but highlighting strong backlog and market share gains in premium HVAC.

Summary

• Data Center Momentum: Bookings from data centers now represent over 20% of new orders, accelerating mix shift.
• Capacity and Integration: Multi-site expansion and leadership restructuring aim to unlock productivity and scale.
• Strategic Positioning for Refrigerant Transition: Early adoption of new refrigerant technology positions AAON ahead of industry peers.

Business Overview

AAON designs and manufactures commercial heating, ventilation, and air conditioning (HVAC) equipment, generating revenue through sales of premium, semi-custom, and basic HVAC systems as well as aftermarket parts. Its business is organized around three core segments: AAON Oklahoma, Basics, and AAON Coil Products, with a growing focus on high-value verticals like data centers and parts.

Performance Analysis

AAON posted double-digit sales and profit growth in Q4, reflecting both organic volume gains and incremental pricing. The Basics segment delivered standout results, with sales and profits up sharply, while AAON Oklahoma also contributed strong growth. AAON Coil Products lagged, declining year-over-year, but remains strategically important for future capacity.

Gross margin expansion was a highlight, driven by pricing, productivity, and scale benefits. SG&A growth outpaced sales, mainly due to higher warranty, profit sharing, and investments in back-office technology. Capital expenditures nearly doubled, reflecting heavy investment in expanding manufacturing capacity at key sites, with these projects expected to support future output and efficiency.

• Operational Leverage: Margin gains were supported by both volume and cost discipline, with gross profit margin up nearly 560 basis points year-over-year.
• Backlog Stability: Bookings outpaced production, resulting in a sequential increase in backlog, despite a modest year-over-year decline as lead times normalized.
• Parts Business Acceleration: Parts sales grew 26.3% and are targeted to double as a percent of total sales within four years, offering a high-margin growth lever.

Cash flow and leverage improved, with significant paydown of credit lines and a strong working capital position, despite ongoing heavy CapEx. The company’s balance sheet remains robust, supporting its aggressive growth investments.

Executive Commentary

Strategic Positioning

1. Data Center and Vertical Market Focus

AAON is aggressively targeting the data center cooling market, which now accounts for over 10% of revenue and over 20% of bookings. This mix shift is supported by product and relationship investments—especially in high-density, AI-driven liquid cooling solutions—and is a key driver for recent and planned capacity expansions.

2. Capacity Expansion and Site Integration

Major capital projects at Longview, Texas and Redmond, Oregon are set to increase manufacturing square footage and, more importantly, sales capacity for high-volume, low-variability products like data center solutions. Leadership restructuring and cross-site collaboration aim to accelerate best practice adoption and operational sophistication.

3. Product Innovation and Regulatory Readiness

AAON leads peers in the rollout of new refrigerant (454B) equipment, accepting orders months ahead of most competitors. The Alpha Class air source heat pump, operable down to zero degrees Fahrenheit, positions the company to capture share as electrification and decarbonization regulations tighten. Early adoption of regulatory-driven product changes is expected to be a competitive advantage as replacement cycles accelerate.

4. Aftermarket and Customer Experience Expansion

The parts business is identified as a high-margin, high-growth segment, with new investments in training academies and sales channel support. The company is also shifting toward a full-lifecycle customer experience model, aiming to build brand loyalty and recurring revenue streams through installation, operation, and maintenance support.

5. Pricing Power and Margin Discipline

Recent pricing actions (five consecutive 1% increases) have secured gross margin targets, and management indicates no immediate need for further increases unless input costs change. The price gap versus competitors has narrowed, especially as regulatory requirements force industry peers to raise their cost structures.

Key Considerations

AAON’s quarter reflects a blend of cyclical resilience and secular tailwinds, but also exposes the business to execution risk as it scales operations and navigates a shifting regulatory landscape.

Key Considerations:

• Data Center Scaling: Capacity investments are directly linked to data center demand; execution risk rises if vertical growth slows or product mix shifts unexpectedly.
• Backlog and Lead Time Normalization: Intentional backlog reduction has stabilized lead times, but could limit upside if market softness deepens.
• Parts and Aftermarket Expansion: Success in doubling the parts business will hinge on channel execution and maintaining premium brand positioning.
• Regulatory and Refrigerant Transition: Early readiness for refrigerant changes provides a near-term edge, but market adoption timing remains uncertain and could impact replacement cycles.
• SG&A Growth: Higher warranty and technology costs are elevating overhead, requiring continued volume and margin discipline to offset.

Risks

Macro headwinds in non-residential construction and softness in office and retail verticals threaten broad market demand, even as data centers and manufacturing remain strong. The refrigerant transition introduces timing risk for replacement sales, with potential for mid-year order volatility. Execution on major capacity expansions and integration across sites is critical, as delays or cost overruns could pressure margins and returns. Elevated SG&A and ongoing CapEx raise the bar for future operating leverage.

Forward Outlook

For Q1 2024, AAON guided to:

• Sales and earnings down sequentially from Q4, but up modestly year-over-year.
• Gross margin expected to rise year-over-year, mainly on a favorable Q1 comp.

For full-year 2024, management expects:

• Mid-single-digit pricing contribution to sales growth.
• Low single-digit volume growth.
• SG&A as a percent of sales to be modestly up.
• CapEx of approximately $125 million, sustaining heavy investment pace.

Management highlighted continued resilience in bookings, robust pipeline in key verticals, and a strategic advantage in refrigerant readiness as drivers for the year, while cautioning on tougher comps and sector-wide construction softness.

Takeaways

AAON’s Q4 and full-year performance underscore its ability to capitalize on secular trends and vertical market shifts, while navigating operational complexity and regulatory change.

• Vertical Market Execution: Data center momentum and premium product positioning are translating to market share gains and justify ongoing capacity investment.
• Operational Integration: Leadership changes and site integration efforts are building a foundation for future scale, but require flawless execution as complexity rises.
• Regulatory Tailwinds: Early adoption of new refrigerant technology and energy efficiency standards positions AAON to benefit as industry adoption accelerates.

Conclusion

AAON enters 2024 with strong tailwinds in data centers and regulatory-driven demand, but faces a more challenging macro backdrop and execution risk as it scales. The company’s proactive investments and market positioning provide upside, but require continued discipline to convert backlog and capacity into profitable growth.

Industry Read-Through

AAON’s results highlight the growing importance of vertical market specialization in the HVAC sector, with data center and manufacturing demand offsetting broader non-residential softness. The refrigerant transition and decarbonization trends are accelerating product innovation and raising the bar for regulatory readiness across the industry. Manufacturers who can quickly adapt to new standards and deliver premium, energy-efficient solutions will capture share as replacement cycles and customer requirements evolve. The parts and aftermarket segment is emerging as a critical profit driver, suggesting peers may follow AAON’s playbook to expand lifecycle value and recurring revenue streams.

AAON Industrials HVAC Data Centers Capacity Expansion Aftermarket Decarbonization Refrigerant Transition