Envirogreen™ Slimline Systempac

The Firebird HVO ready, slimline System oil boiler which is manufactured in Ireland is also referred to as a ‘sealed system boiler’, provides central heating and direct hot water via a storage cylinder, which is usually housed in an airing cupboard. Unlike a regular boiler heating system, there is no requirement to have water tanks situated in the loft. System boilers are generally easier to install, as the heating and hot water system components form an integral part of the boiler itself.

The Envirogreen Slimline Systempac is different in that it is pre-plumbed and pre-wired for ease of installation and has a three directional flue option. There is no requirement to house the boiler in a building, so this option provides an ideal solution if internal space is at a premium.


  • Three directional flue options.
  • Pre-plumbed and pre-wired.
  • Easy access to pre-wired circulating pump.
  • Connection to pipework can be made from the base.
  • High performance low NOx Elco burner.
  • High quality weather-proof casing.
  • Factory-fitted expansion vessel and circulating pump saves space and installation time.
  • Fully insulated to prevent heat loss.
  • Patented heat exchanger design.
  • Fitted with frost protection stat.
  • Ultra quiet operation.
  • Stainless steel terminal guard.
  • Removable sides for ease of access.
  • Suitable for open vented and sealed systems.


Product Specification

Envirogreen ModelProduct CodeWeight kgErP RatingDimensions (mm)
Envirogreen™ Slimline Systempac 12-20kWESE020SLM147A960465760
Envirogreen™ Slimline Systempac 20-26kWESE026SLM150A960465760
Envirogreen™ Slimline Systempac 26-35kWESE035SLM153A960465760