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Space Heating
HTP's space heating boilers provide ultimate comfort and the best overall efficiency ratings while keeping maintenance and operating costs to a minimum. With a HTP high efficiency boiler you can achieve the heat your family or business needs while also saving money and energy.
Residential
Commercial
- • Elite XL
Not sure which type of space heater is right for you? Learn more by viewing our space heating selection guide
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- Water Heating
Water Heating
Residential
Tank TypeGas SeriesElectric SeriesCommercial
Tank TypeGas SeriesElectric SeriesHTP has several water heating options for your needs: tank type water heaters, tankless water heaters, our Crossover series water heaters, or supply boilers. HTP also has models for both your residential or commercial needs.
Not sure which type of water heater is right for you? Learn more by viewing our water heating selection guide
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- Indirect Water Heating
Indirect Water Heating
HTP's Indirect Water Heaters can be a part of your combination heating system whether you need indirect tanks or storage tanks for your residential or commercial needs.
Not sure which type of indirect water heating option is right for you? Learn more by viewing our indirect water heating selection guide.
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- Combination Appliances
Combination Appliances
Combination appliances save homeowners money on operating expenses, reduces overall installation costs, and takes up less space than traditional space heating and hot water appliances.
Floor and Wall Combis
Phoenix Series
Make the right move.
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.
Description EFW-285WBN EFW-340WBN EFW-399WBN CSA Input Modulation [MBH]¹ 28.5-285 39.9-340 39.9-399 Heating Capacity [MBH]¹´² 263 324 380 Net AHRI Rating, Water [MBH] ¹´² 228 282 330 AFUE [%]² 95 NA NA Thermal Efficiency [%]² NA 95.4 95.4 Water Connections, NPT [in.] 1-1/4 (Male) 1-1/2 (Male) 1-1/2 (Male) Gas Connection, NPT [in.] 3/4(Male) 3/4(Male) 3/4(Male) Vent/Air Intake Pipe Diameter [in.]³ 3 4 4 Cabinet Height [in.] 33-3/8 36-5/8 36-5/8 Cabinet Width [in.] 21-1/4 25-1/4 25-1/4 Cabinet Depth [in.] 18-5/8 20 20 Approx. Boiler Weight with Water [lbs.] 180 250 250 Approx. Boiler Water Content [Gallons] 4.9 7.1 6.4 Electrical Rating 120v/1Ph/60HZ/less than 12A 120v/1Ph/60HZ/less than 12A 120v/1Ph/60HZ/less than 12A 1. Listed Input and Output ratings are at minimum vent lengths at an altitude of 0-2000ft. Numbers will be lower with longer venting and/or altitudes greater than 2000ft.
2. Ratings based on standard test procedures prescribed by the U.S. Department of Energy; certified by AHRI.
3. EFW units require a special venting system, use only vent materials and methods detailed in these instructions.High Altitude Operation –The EFW is designed to operate at its maximum listed capacity in installations located at 0-2000ft above sea level. Since the density of air decreases as elevation increases,maximum specified capacity should be de-rated for elevations above 2000 ft as per below.
Elevations 2001 ft. 3000 ft. 4000 ft. 4500 ft. In USA¹ de-rate by 10% de-rate by 16% de-rate by 18% de-rate by 20% 1. USA: De-rate capacity by 4% for every 1000 ft if altitude is above 2000 ft. .
Combustion – The combustion of the boiler must be checked with a calibrated combustion analyzer by a trained and certified technician in accordance with local regulations. This will ensure the safe and reliable operation of the boiler. It is the technician/installers responsibility to properly check the combustion in accordance with the section dedicated to combustion located in the installation manual. Failure to follow these instructions may result in property damage, serious injury or death.
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