The Preferred Unit Steam Generator Boiler
One Vendor. One Design. One Warranty.
The Preferred Unit Steam Generator Boiler is a historically reliable steam generator that we have updated with today’s high-efficiency combustion technology, delivering cleaner combustion, tighter control, and lower operating costs.
The revived boiler is a complete boiler room system package, including burner fan, controls, fuel handling, accessories, and integration support. For facilities where uptime, accountability, and coordination are critical, having one partner responsible for the entire system is optimal.
- Overview
- Features
- Applications
- Documents
Originally designed as a completely packaged steam system, the original Preferred design was built to meet the growing demand for compact, dependable, operator-friendly steam production. Its key strengths of high thermal efficiency, small footprint, and simple operation made it a staple in manufacturing facilities, institutions, and commercial buildings nationwide.
Today, we’re bringing this proven design into modern applications with our high-efficiency combustion systems, preserving the durability and smart engineering that made it famous and offering a whole Boiler room system package for applications where single source responsibility is a non-negotiable.
Single-Source Responsibility
For facilities where uptime, accountability, and coordination are critical, having one partner responsible for the entire system is a major advantage, with no finger-pointing across multiple vendors.
Simplified Installation & Integration
Packaged systems reduce on-site complexity, shorten installation timelines, and remove the risk of mismatched components or incompatible controls.
Built for Durability & Longevity
The rugged tube layout, ample heating surface, and smart gas-travel design that defined the original system continue to deliver exceptional reliability in modern applications.
Backed by Preferred’s Engineering & Service
From design through commissioning and lifecycle support, Preferred provides the continuity and expertise needed to maximize performance and maintain long-term reliability.
Ideal for Tight Spaces & Special Applications
This revived boiler’s compact footprint and efficient draft design make it an excellent fit for industrial, institutional, or retrofit environments where space and venting options are limited.
Fully Automatic Operation
Integrated combustion control, fuel management, and safety systems.
High Thermal Efficiency
Up to 85% thermal efficiency and up to 89% efficiency on #2 oil through optimized combustion and heat transfer.
High Turn Down Damper
Small footprint system with draft configurations adaptable to various buildings.
- Space-limited boiler rooms needing a compact, packaged solution
- End users requiring single-source responsibility for design, integration, and performance
- Projects needing faster commissioning and clearer scope ownership
- Sites prioritizing reliability, maintainability, and lifecycle support
Unit Steam Generator Boiler Brochure
