1. Industrial Heat Exchangers Products
  2. sku: 2366047682936632
  3. LOCHINVAR 100147574

LOCHINVAR 100147574 Heat Exchanger HEX3446

100147574 Lochinvar Hex3446 Heat Exchanger

( Brand: Lochinvar ), ( Manufacturer Part Number: 100147574 ), ( Model: HEX3446 ), ( Type: Heat Exchanger )

Review LOCHINVAR Heat Exchanger

The **Lochinvar 100147574 HEX3446 Heat Exchanger** is a high-performance, industrial-grade component designed to deliver exceptional efficiency and durability in commercial and institutional heating systems. Part of Lochinvar s advanced **HEX Series**, this heat exchanger is engineered to maximize heat transfer while maintaining robust structural integrity, making it an ideal choice for applications requiring reliable, long-lasting performance. Constructed from **304 stainless steel**, this unit is built to withstand the demands of high-temperature environments, ensuring resistance to corrosion, scaling, and thermal stress qualities that extend the lifespan of the entire HVAC system. The **3446 model** features a compact yet robust design, optimized for seamless integration into existing boiler setups, whether in commercial kitchens, large-scale restaurants, or institutional facilities like schools, hospitals, or hotels. Its **serpentine tube configuration** enhances heat exchange efficiency by increasing the surface area available for heat transfer, which translates to faster heating times, reduced energy consumption, and lower operational costs. The heat exchanger s **smooth, precision-engineered passages** minimize pressure drop and reduce the risk of clogging, ensuring consistent performance even in demanding applications. Additionally, Lochinvar s proprietary **flame impingement protection** technology safeguards the exchanger from direct heat exposure, further enhancing its longevity and reliability. Whether used in a **gas-fired boiler system** or paired with a high-efficiency condensing unit, the HEX3446 delivers superior thermal performance while adhering to strict industry standards for safety and efficiency. Its modular design also allows for easy installation and maintenance, reducing downtime and service disruptions. For facilities prioritizing energy efficiency, sustainability, and operational resilience, the Lochinvar 100147574 HEX3446 heat exchanger stands as a premium solution, blending cutting-edge engineering with uncompromising durability.

### **Pros and Cons of buying a Lochinvar 100147574 (HEX3446 Heat Exchanger)**

#### **Pros:**

The Lochinvar HEX3446 heat exchanger is a high-performance, commercial-grade unit designed for efficient heat transfer in hydronic heating systems. Its key advantages include:

1. **Durability and Longevity** Constructed with heavy-duty materials such as stainless steel or copper-nickel alloys, this heat exchanger is built to withstand high-pressure and temperature fluctuations, reducing the risk of leaks or corrosion over time. Lochinvar is a reputable brand known for reliability in commercial and industrial applications.

2. **Efficient Heat Transfer** The design incorporates advanced finned-tube technology, maximizing surface area for optimal heat exchange. This improves system efficiency, reducing energy consumption and operational costs compared to less advanced models.

3. **Compatibility with Lochinvar Boilers** As a direct replacement or upgrade part for Lochinvar s commercial boilers (such as the HEX3446 series), it ensures seamless integration with existing systems. This minimizes installation complexity and potential compatibility issues.

4. **Corrosion Resistance** Depending on the material (e.g., stainless steel or copper-nickel), the heat exchanger is resistant to scale buildup and chemical corrosion, which prolongs its service life and reduces maintenance needs.

5. **Warranty Support** Lochinvar products typically come with manufacturer warranties (often 5 10 years), providing peace of mind against defects or premature failure. This can offset initial costs if the unit lasts as expected.

6. **Scalability** The HEX3446 is designed for medium to large-scale applications (e.g., commercial buildings, hospitals, or industrial facilities), making it suitable for systems requiring higher BTU output without sacrificing efficiency.

7. **Ease of Maintenance** Many models feature accessible components, allowing for straightforward cleaning or replacement of internal parts. This reduces downtime and labor costs during servicing.

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#### **Cons:** While the Lochinvar HEX3446 offers significant benefits, there are potential drawbacks to consider:

1. **High Upfront Cost** As a commercial-grade component, the heat exchanger is more expensive than residential or lower-end models. The cost may range from **$1,500 to $3,500 **, depending on material, brand, and retailer. This can be a significant investment for smaller businesses or DIY projects.

2. **Professional Installation Required** Due to its complexity and the need for proper sealing, pressure testing, and system balancing, installation should ideally be performed by a licensed HVAC technician. DIY installation risks leaks, inefficiencies, or voiding warranties.

3. **Limited Customization** The HEX3446 is a standardized replacement part, meaning it may not accommodate non-standard system configurations. Custom modifications (e.g., altered port sizes or connection types) could require additional workarounds or third-party adapters.

4. **Potential for Scale Buildup** Even with corrosion-resistant materials, hard water or poor water treatment can lead to scale accumulation over time, reducing efficiency. Regular descaling or water treatment may be necessary to maintain performance.

5. **Compatibility Risks with Non-Lochinvar Systems** While designed for Lochinvar boilers, using it in a non-matching system (e.g., a different brand s boiler) might lead to mismatched flow rates, pressure drops, or compatibility issues. Always verify system specifications before purchase.

6. **Weight and Space Requirements** The unit is bulkier than some residential alternatives, requiring adequate space in the boiler room or mechanical closet. Installation may necessitate structural adjustments or additional support.

7. **Depreciation** Like all mechanical components, heat exchangers depreciate over time. While Lochinvar units are durable, they may not retain full resale value, especially if newer, more efficient models emerge.

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### **Conclusion:**

The Lochinvar 100147574 (HEX3446) heat exchanger is a **high-quality, long-lasting investment** for commercial or industrial hydronic heating systems. Its superior durability, efficiency, and compatibility with Lochinvar boilers make it ideal for applications where reliability and performance are critical. However, the **higher cost, need for professional installation, and potential maintenance requirements** must be carefully weighed against budget and system needs.

For **commercial buildings, hospitals, or large-scale facilities** where uptime and efficiency are paramount, the HEX3446 is a strong choice. For **residential use or cost-sensitive projects**, a lower-cost alternative (e.g., a copper or stainless steel residential heat exchanger) may be more practical.

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### **Recommendation:** - **Buy if:**

- You are replacing a failing heat exchanger in a **Lochinvar commercial boiler system**.

- Your system requires **high BTU output and long-term durability**.

- You can afford the **upfront cost** and have a **licensed technician** for installation.

- Your water treatment system is **adequate to prevent scale buildup**.

- **Consider alternatives if:**

- You are working with a **tight budget** and can find a comparable used/refurbished unit.

- Your system is **residential or small-scale**, where a less expensive model may suffice.

- You lack access to **professional installation services**.

- **Additional Tips:**

- Always **verify the exact model compatibility** with your boiler s manual or Lochinvar s technical support.

- Compare **warranty terms** and **customer reviews** to ensure the unit meets expectations.

- Factor in **long-term energy savings** while the initial cost is high, the efficiency gains may offset it over time.

Ultimately, the Lochinvar HEX3446 is a **premium choice** for demanding applications, but its value depends on how well it aligns with your system s requirements and budget.

Details:

ASME HEAT EXCHANGER EB200STAMP, BRAND NEW IN BOX NEVER OPENED READY TO SHIP.

part #: 100147574 price

  • $2200.00

specifications indheatexchanger:

  • brand: Lochinvar
  • mpn: 100147574
  • model: Hex3446
  • type: Heat Exchanger

offer indheatexchanger:

  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: February 16, 2026
  • best offers: True

seller indheatexchanger:

  • city: Phoenix, Arizona
  • rating: 100.0%
  • # reviews: 2

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  • condition: New
  • HVAC Refrigeration > HVAC Refrigeration Components > Heat Exchangers

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type: heat exchanger,
category: business & industrial > hvac refrigeration > hvac refrigeration components > heat exchangers, sku: 2366047682936632,
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