HTP EFW Series
High Efficiency Condensing Stainless Steel Boilers
When it comes to home heating, the EFW Series delivers optimum efficiency and reliability. With a range of sizes from 285,000-399,000 BTU/Hr and modulation up to 10:1 turndown, this modulating, condensing, stainless steel, wall mount boiler is perfect for almost any home. Installers can rely on installation flexibility with top or bottom supply and return connections, top or bottom gas connections, vent runs of up to 150ft for the 285 and 100ft for the 340-399 and five vent termination options.
Maximize efficiency and fuel savings
Engineered to the highest of standards, the EFW Stainless Steel Fire Tube Heat Exchanger can deliver up to 95% AFUE and 95.4 thermal efficiency and a fully modulating burner
Dependable Performance
The industry-leading ASME certified fire-tube exchanger is constructed of stainless steel for better corrosion resistance. Each boiler is factory tested to ensure top performance. The EFW, combined with HTP’s industry leading customer and technical service departments, results in a sure-fire winning choice.
- Cascading up to 8 units
- Stainless steel down-fired fire tube design
- Three models from 285,000 to 399,000 BTU/Hr
- Full modulation up to 10:1 turndown
- Advanced Honeywell Sola Boiler Controller with backlit screen display
- Vent runs of up to 150ft for the 285 and 100ft for the 340 - 399
- PVC, CPVC, Polypropylene or Stainless-Steel venting
- Integrated LWCO with test switch
Features:
Down-Fired Fire Tube – The EFW heat exchanger is ASME certified, burner is down-fired. The tubes have a dimpled design to optimize heat transfer, which increases energy efficiency. The Fire Tubes provide generous space for flue gas to pass, and significantly reduce the need for cleaning due to the vertical configuration and self-cleaning operation when in condensing mode.
Flexibility – The design of the EFW offers more flexibility than any other boiler on the market, with vent runs of up to 150ft for the 285 and 100ft for the 340-399, five vent termination options, 2" optional venting on some models and plumbing and gas connections at either top or bottom.
User Interface – Provides easy navigation to all of the controller’s parameters and setpoints. The backlit screen continuously displays system information to ensure safe and efficient operation.
The Control – The HTP EFW boiler has an advanced Honeywell control that provides easy navigation and offers complete auto-diagnostics. All the information needed to set up, monitor boiler functions and service is easy to access. The easy-to-use control allows for multiple circulators and temperature zones and has an integrated cascade feature to join multiple boilers.
HTP EFW Documents:
Brochure | Installation Manual | User Manual | Controller Display Instructions
Propane Conversion Instructions 285 |
Propane Conversion Instructions 340-399
285WBN Submittal | 340WBN Submittal | 399WBN Submittal | Warranty