icon
Affiliate Program

Want a better deal? Leave your number or call us

PHOENIX 35, Compact Pellet Boiler, 120K BTU

Heating Capacity: Up to 4,500 ft²

Choose your Phoenix model

Order online

Or call us for a complete-system quote and volume pricing.

$8,640.45 $7,776.40
Shipping $1,469 Free

Secure checkout · Free shipping

  • Up to 96% efficiencyHigh-efficiency pellet heat.
  • 18 or 35 kW outputTwo Phoenix capacities.
  • 240 lb built-in hopper3 to 10 days autonomy.
  • Self-cleaning operationSimpler routine maintenance.
  • App-ready controlRemote module compatible.

Phoenix Pellet Boiler

Main Features

  1. 96% pellet efficiency

    Converts wood pellets into hydronic heat with up to 96% efficiency and low CO emissions.

  2. 18 or 35 kW heating choices

    Choose Phoenix 18 for up to 2,500 ft2 or Phoenix 35 for up to 4,500 ft2 heating applications.

  3. Built-in hopper autonomy

    The integrated 240 lb pellet hopper supports 3 to 10 days of autonomy per filling, depending on demand.

  4. Automatic startup and management

    Automatic startup and management simplify daily operation for residential, workshop, garage, and light commercial hydronic systems.

  5. Easier self-cleaning maintenance

    Integrated self-cleaning support helps keep routine maintenance straightforward and boiler performance consistent.

  6. Low-emission pellet heat

    CO emissions are rated below 300 mg/m3, with A-class wood pellets recommended for stable operation.

Phoenix pellet boiler front view
Phoenix pellet boiler application image

Compact mono-block layout

The pellet tank is built directly over the heat exchanger, keeping the Phoenix footprint compact for utility rooms, garages, and mechanical spaces.

Remote app-ready control

A smart remote control module enables Android and Apple app access for convenient boiler monitoring and adjustments.

Low-maintenance pellet heating

Automatic fuel modulation, built-in hopper capacity, and self-cleaning support reduce daily handling compared with manual solid-fuel systems.

Hydronic heating fit

Designed for water-based heating systems with operating pressure from 0.5 to 1.0 bar and maximum water temperature of 90 C / 194 F.

Installed in real homes and workshops

Customer Success Stories

See how customers use MBTEK products in real projects.

Technical specifications

Comparison specifications for Phoenix 18 and Phoenix 35 pellet boilers, based on the official Phoenix Boiler Specifications sheet.

Product family Phoenix 18 PWB18KW / Phoenix 35 PWB35KW wood pellet boiler
Output and heated area Phoenix 18: 18 kW / 61,400 BTU, up to 2,500 ft2; Phoenix 35: 35 kW / 120,000 BTU, up to 4,500 ft2
Efficiency and emissions 96% efficiency; CO emissions below 300 mg/m3
Hopper and autonomy 109 kg / 240 lb pellet hopper; average autonomy per filling: 3 to 10 days
Dimensions Phoenix 18: 600 W x 795 D x 1465 H mm / 23.6 W x 31.3 D x 57.6 H in; Phoenix 35: 630 W x 791 D x 1510 H mm / 24.75 W x 31.15 D x 59.5 H in
Weight Phoenix 18: 320 kg / 705 lb; Phoenix 35: 360 kg / 794 lb
Chimney and connections 12 Pa chimney draft; minimum chimney diameter 160 mm / 6 in; water input/output 1 1/4 in; exhaust 80 mm / 3 in on Phoenix 18 and 102 mm / 4 in on Phoenix 35
Operating limits and warranty Water pressure 0.5-1.0 bar / 7.25-15 PSI; maximum water temperature 90 C / 194 F; 2-year parts warranty

Use A-class wood pellets only and follow the installation guide for chimney, clearance, pressure, and safety requirements.

Product documents

Download the current Phoenix installation guide and specifications sheet.

Phoenix Installation and Maintenance Guide

Installation, startup, exploitation, and maintenance guidance for Phoenix pellet boilers.

Phoenix Boiler Specifications

Official technical specifications for Phoenix 18, Phoenix 35, and Phoenix 50 pellet boilers.

Product details

Phoenix Pellet Boiler – 120,000 BTU / 35 kW

High-efficiency pellet boiler designed as a compact, powerful, and technologically advanced heating solution for larger homes, workshops, garages, and commercial hydronic heating applications.

With up to 96% efficiency, a large built-in pellet hopper, automatic fuel modulation, and remote control capability, the Phoenix boiler delivers strong heating performance with simple maintenance.

 

Key Benefits

  • High-efficiency performance with up to 96% efficiency
  • 120,000 BTU / 35 kW heating capacity for areas up to 4,500 ft²
  • Compact mono-block design with the pellet tank built directly over the heat exchanger
  • Integrated self-cleaning system for easier maintenance
  • Large 240 lb hopper capacity for 3 to 10 days of autonomy, depending on energy demand
  • Programmable operation so you can decide when the boiler turns on or off
  • Smart remote control module with Android and Apple app access
  • Automatic fuel modulation for efficient operation and low emissions
  • Made in Europe using an ISO-9001 automated manufacturing process
  • Tested before shipping with vacuum pressure and water testing
  • 2-year parts warranty included

 

Specifications

  • Heating Capacity: 120,000 BTU / 35 kW
  • Recommended Area: Up to 4,500 ft²
  • Efficiency: Up to 96%
  • Fuel Type: Wood pellets only
  • Hopper Capacity: 240 lbs of pellets
  • Autonomy: 3 to 10 days, depending on energy demand
  • Weight: 794 lbs
  • Dimensions: 24.75" W x 31.15" D x 59.5" H
  • Exhaust Pipe: 4" / 102 mm
  • Minimum Chimney Diameter: 6" / 160 mm
  • Max Water Temperature: 90°C / 194°F
  • Working Pressure: 0.5 to 1.0 bar / 7.25 to 15 PSI
  • Emissions: Low CO emissions, less than 300 mg/m³
  • Origin: Made in Europe
  • Warranty: 2-year warranty on parts

Independent feedback

Customer Reviews

Company trust comes first, followed by detailed reviews for this product.

Verified company reviews

Reviews for PHOENIX 35, Compact Pellet Boiler, 120K BTU

Need an installer?
We made it easy for you.

Find an installer

Please note that listed installers are independent contractors and not employees of MBTek. They are skilled professionals familiar with our products and capable of efficient installation.

Any questions?
Reach out to us

Our team can help with product questions, sizing guidance, and next steps.

Contact us
Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday
January,February,March,April,May,June,July,August,September,October,November,December
Not enough items available. Only [max] left.
Promotion
Call now 1-888-301-0737