Buderus developed the full three pass system to increase the heat transfer and efficiency of boilers. This design allows more heat to be transferred during all three passes, unlike conventional boilers that only use one pass to transfer heat. This system maximizes the total possible heat available with the lowest fuel consumption possible. To greatly decrease standby loss Buderus has manufactured a 3½" and 4" thick thermal insulation.
|MODEL||Output MBtuH||IBR MBtuH||Firing Rate GPH||AFUE||Water Content Gal.||HxWxD||Weight. Lbs.|
|G515-7||818.0||711.0||0.00||88.2||68.20||52.25 x 38.5 x 54.5||2731|
|G515-8||1009.0||877.0||0.00||88.2||77.70||52.25 x 38.5 x 61||3059|
|G515-9||1200.0||1043.0||0.00||88.1||87.20||52.25 x 38.5 x 67.5||3505|
|G515-10||1391.0||1210.0||0.00||88.1||96.70||52.25 x 38.5 x 74.25||3864|
|G515-11||1582.0||1376.0||0.00||88.1||106.20||52.25 x 38.5 x 81||4188|
|G515-12||1773.0||1542.0||0.00||88.1||115.70||52.25 x 38.5 x 87.5||4541|