Picture of a Greenflame FG3717 SLIM 18KW Internal Biomass Boiler

Greenflame FG3717 SLIM 18KW Internal Biomass Boiler

Greenflames logo Part no. FG3717
Product Code 2500697221

Product Overview


Greenflame SLIMs are now one of the most successful biomass ranges on the market. Noted for its versatile design and small footprint the External SLIM allows for ample space around a property. Its designed to be sited directly against a wall with no need for rear access. Greenflame has a built in digital programmer. The user friendly controller has many features including 7 day, 5 day/2 day time lock control. It monitors the operation and supply of pellets and provides full fault diagnostics and system parameters. Other features include fully adjustable boiler thermostat and thermistor control. Internal and external models span 13kW to 28 kW.

Product Features

  • Includes 5 NOVA flue kit (Internal- NOVA adapter)
  • Serviceable from the front
  • Top flue outlet (no 90 bend required)
  • Automatic Burner Cleaning
  • Weatherproof casing
  • Vacuum regulator
  • 45kg integral store
  • 7 step power modulation
  • Easy to use LCD controller
  • Automatic pellet feed
  • Complete with pump and pressure switch
  • Internal model available
  • MCS accredited 90.7% + efficient
  • Large fuel store capacity
  • Integrated pellet store
  • Up to 7 days continual burning
  • (Average usage is 3 to 4 days before re-fuelling)
  • Low level pellet sensor and warning signal AV C control
  • (Air Velocity Control) Generously sized ash pan
  • No need for buffer tank (improved efficiencies if used) 28kW onwards required
  • Guarantee: 1 year main parts & 5 year heat exchanger
  • Tested to EN303-5
  • External model includes stainless steel flue system (2 metres)