Technical Bulletins
Technical Bulletins provide the latest updates about our boilers, solar panels and heat pumps.
Zoned central heating (via S-Plan) - incorporating FW100 weather compensation controller
Using the FW100 weather compensation controller with S-Plan zoned central heating.
- Ref:
- TB 0014
- Published:
- 8th September, 2011
Flexible flue liner maximum length
The flexible flue system for use on the Greenstar FS CDi Regular boilers has a maximum vertical length of 12m, which can be cut to suit.
- Ref:
- TB 0049
- Published:
- 6th June, 2011
DHW secondary circulation
Domestic Hot Water systems with extended pipe runs can become an inconvenience and lead to excessive water usage. At the design stage consideration should be given to the incorporation of a secondary circulation arrangement.
- Ref:
- TB 0050
- Published:
- 6th June, 2011
Hydraulic resistances for Greenstar gas regular boilers
Confirmation of hydraulic resistances for the Greenstar Ri and CDi Regular boilers' heat exchangers.
- Ref:
- TB 0048
- Published:
- 17th March, 2011
Gas Safe Register: RS fanned chimney/flue systems - consumer info and risk checklist
Gas Safe Register technical bulletin on room-sealed fanned draught chimney/flue systems concealed within voids. Consumer information and risk assessment checklist.
- Ref:
- Gas Safe TB 008Ed 2
- Published:
- 23rd February, 2011
Gas Safe Register: Room-sealed fanned draught chimney systems in voids
Gas Safe Register technical bulletin on room-sealed fanned draught chimney/flue systems concealed within voids. How to manage the potential risks and satisfy gas safety regulations.
- Ref:
- Gas Safe TB 008Ed 2
- Published:
- 23rd February, 2011


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