Wall Mount Heat Only Boiler, 81,000 BTU, High Efficiency

Laars MFTHW199NA2XN – High-Efficiency Wall-Hung Boiler for Demanding Applications

The Laars FT Series MFTHW199NA2XN is a high-performance, condensing, wall-mounted boiler engineered for both residential and light commercial heating systems. Utilizing fire tube heat exchanger technology, this unit delivers efficient and consistent heat transfer while maintaining low emissions and long-term reliability.

With a thermal input of 199,000 BTU and modulation capabilities, the MFTHW199NA2XN ensures accurate temperature control and reduced cycling, contributing to improved system efficiency and extended component life. This boiler is particularly well-suited for hydronic heating applications where space savings and performance are critical.

Key Advantages for Contractors

• Fire Tube Heat Exchanger: The stainless steel heat exchanger offers superior thermal efficiency and corrosion resistance, supporting a long operational lifespan under varying load conditions.
• Ultra-High Efficiency: AFUE ratings exceed 95%, making this unit compliant with ENERGY STAR® and rebate programs where applicable.
• Compact, Wall-Mount Design: Designed for tight mechanical rooms, the wall-hung configuration frees up valuable floor space.
• Integrated Modulation: A 10:1 turndown ratio allows precise control of output to match real-time system demand, minimizing fuel consumption and wear.
• Low NOx Operation: Fully compliant with SCAQMD Rule 1146.2 (<20 ppm NOx), meeting environmental regulations in low-emission zones.

Technical Specifications

• Model: MFTHW199NA2XN (Laars FT Series)
• Heating Input: 199,000 BTU/hr
• Output: 189,000 BTU/hr
• Efficiency: 95% AFUE
• Type: Wall-mounted, condensing heat-only boiler
• Heat Exchanger: 316L stainless steel fire tube
• Connections: 1" NPT water inlet/outlet, 3/4" gas inlet
• Vent Options: 2" or 3" PVC, CPVC, or polypropylene – direct vent
• Max Vent Length: Up to 100 ft (3")

Installation Overview

The MFTHW199NA2XN is optimized for professional installation. Combustion calibration, vent configuration, and proper primary-secondary piping layouts are critical for maximizing performance and safety. This unit includes an onboard circulator, condensate trap, and comprehensive control interface, minimizing the need for external components and simplifying integration into existing systems.

Proper venting, condensate management, and system zoning should follow local code requirements. Laars provides detailed manuals to support hydronic designers and licensed contractors with sizing and setup.

Professional-Grade Features

• Advanced Digital Control System: Allows setup of multiple parameters including outdoor reset, system pump control, and safety diagnostics.
• Quiet Operation: Low sound levels during operation due to insulated chassis and variable speed fan design.
• Multiple Zone Compatibility: Ideal for multi-zone residential systems using zone valves or pumps.
• CSA and ASME Certified: Built to meet national standards for safety and performance.
• Warranty: 10-year limited warranty on heat exchanger, 2 years on parts (subject to installation conditions).

Summary

The Laars MFTHW199NA2XN provides a reliable, space-saving solution for high-efficiency heating projects. Built with contractor needs in mind, it delivers precision modulation, robust construction, and straightforward serviceability. Whether for new installations or retrofit applications, this FT Series unit offers a strong balance of performance and install versatility in the 199 MBH category.