Description
The Firebird UK Envirogreen Slimline Combipac is the most compact external Combi boiler available on the market. As a combination unit, it serves both as an instant domestic water heater and a central heating boiler. Hot water is produced directly via a thermal store the moment a tap is turned on, reducing costs and eliminating the need for a separate storage tank. Delivering immediate access to hot water, this boiler is particularly well-suited to smaller households with a single bathroom and shower or ensuite.
The Envirogreen Slimline Combipac offers specifications comparable to the internal Envirogreen Slimline Combi, with the added benefit of a built-in frost thermostat for outdoor protection.
- Only 570mm wide.
- Multidirectional Flue Options.
- Excellent Hot Water Performance.
- Grundfos Twin circulating pumps – no divertor required.
- No flow switch – water flow electronically detected.
- PCB controller with high accurate thermistors.
- High quality weatherproof PVC coated casing.
- Rapid re-heat time after hot water draw off.
- High performance low NOx Elco burner.
- Easy to install and service.
- Two outputs available from 12kW to 26kW.
- Built in filling loop.
- Built in isolation valves.
- Patented heat exchanger design.
- Bronze Teflon washer fitted on plate heat exchanger.
- Fully insulated and acoustically designed for ultra-quiet operation.
- Low pressure switch protects boiler in the unlikely event of system water loss.


