AHG Solutions Guide_Edition 2.7
Full Product and Solutions Guide - Automatic Heating Global Pty Ltd
Full Product and Solutions Guide - Automatic Heating Global Pty Ltd
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Flue Dilution - Flue Systems<br />
Contents<br />
Flue Dilution<br />
CONDENSING &<br />
CONVENTIONAL BOILERS<br />
Introduction to Flue Dilution<br />
A flue dilution system is normally installed where there are difficulties in the provision of a conventional<br />
flue, or indeed where savings can be made if the only other alternative is a high rise flue. Using flue<br />
dilution, boiler fumes can be discharged from the side of a building including at low level.<br />
How Does It Work?<br />
The general principle is that ambient air from outside the building is mixed with the flue gas in order to<br />
dilute the CO² content to less than 1% when using natural gas or LPG boilers.<br />
As with all flue systems, local gas authority approval must also be sought for a flue dilution system.<br />
The shift in the commercial market towards condensing boilers, has had a significant evolutionary<br />
effect on flue dilution. The flue gas temperature from these appliances is far lower than traditional<br />
atmospheric boilers, and as a result condensation is created within the flue. By mixing this warm moist<br />
gas with cooler air, the mixed gas temperature is reduced further, creating more condensation. There are<br />
a few critical considerations:<br />
• Material of flue system – only use 316 grade stainless steel on condensing applications and flue dilution<br />
systems.<br />
• The flue system must be capable of handling condensation in large quantities.<br />
• Pluming at the flue discharge – suspended water molecules in the diluted flue gas will be discharged out<br />
through the grille to atmosphere. This pluming can often be significant and can cause a nuisance to local<br />
residents and building occupants. Therefore careful consideration of the discharge position is of utmost<br />
importance.<br />
For technical help on fan dilution systems, either email our Technical Department<br />
at sales@automaticheating.com.au or call on 1800 337 959<br />
Flue Dilution Fan Stainless Steel<br />
Product Code<br />
Flue gas pipe Nominal Ø mm<br />
RS-180 100–200<br />
RS-180 ES 100–200<br />
RS-180 ESP 100–200<br />
RS-225 ES 200–250<br />
RS-225 ESP 200–250<br />
Flue Dilution Fan Adaptor<br />
Product Code For chimney fan For pipe NW<br />
RSG 180/130 RS 180 130<br />
RSG 180/140 RS 180 140<br />
RSG 180/150 RS 180 150<br />
RSG 180/160 RS 180 160<br />
RSG 180/180 RS 180 180<br />
RSG 180/200 RS 180 200<br />
RSG 225/200 RS 225 200<br />
RSG 225/225 RS 225 225<br />
RSG 225/250 RS 225 250<br />
RSG 225/300 RS 225 300<br />
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