Perfection requires precision. Every time. How do you keep precise temperature and pressure from the tank to the espresso cup? The Breville Dual Boiler’s dedicated boilers for simultaneous milk texturing and espresso extraction ensures that your espresso arrives in its cup with the optimum flavor.
A domestic machine with numerous professional features, it regulates temperature to within one degree Celsius of the optimal temperature, giving budding baristas the precision and control they need to perfect their technique. Actively heated group head, PID temperature control, over-pressure valve and low pressure pre-infusion maintain optimum temperature and pressure throughout extraction.
Ultimately there is only one standard by which espresso should be measured: taste. And espresso taste is notorious for being a matter of preference. The Breville Dual Boiler gives you the tools to customize your espresso to your personal specifications, with the ability to program shot temperature with precise PID temperature regulation technology, shot volume (1 and 2 cup), and pre-infusion duration and power. You can also program it to auto start, so it will be warmed up and ready to go in the morning.
|Extraction pressure and low pressure pre-infusion ||Temperature ||Simultaneous steam |
Limiting the maximum pressure throughout extraction produces a balanced espresso with an aromatic crema: too little pressure during extraction leads to espresso that is thin and under-developed, but too much pressure during extraction can lead to bitter flavors. The Breville Dual Boiler has low-pressure infusion with programmable pressure and duration, a feature seen in high-grade commercial espresso machines but not in domestic thermoblock systems.
Maximum extraction pressure is achieved with an Over-Pressure Valve (OPV) for optimal espresso flavor.
Low pressure pre-infusion gradually increases water pressure at the start of the extraction to gently expand grinds for an even extraction (power & duration is user programmable).
Precise and stable water temperature is required for optimum espresso flavor. Water temperature that is too low can lead to espresso which is sour, too high can lead to ashy or bitter flavors.
The dedicated stainless steel espresso boiler with electronic PID control technology delivers precise water temperature with variation of only one degree Celsius, based on tests conducted by Breville (2011).
The actively heated group head maintains thermal stability throughout extraction, controlled by PID technology.
The stainless steel heat exchanger delivers pre-heated water to the espresso boiler via the steam boiler, aiding thermal stability for optimal extraction temperature.
If combining the textured milk and espresso is delayed, the crema may dissipate or lose its flavor. The ability to texture milk whilst extracting espresso, which allows you to immediately combine the two, ensures that the delicate aromatics of the crema are captured. This produces a creamier texture with more complex flavors.
The dedicated stainless steel steam boiler delivers steam on demand, allowing you to texture for one cup or continuously for multiple cups
|Attribute || |
BES900XL: Dual Boiler
BES870XL: Barista Express
BES840XL: the Infuser
|Dimensions ||16.25"x15"x15" ||13.25"x12.5"x14.5" ||10.25"x12.5"x13.25" |
|Weight ||30 lbs ||23 lbs ||17 lbs |
|Heating system ||Dual boilers, stainless steel ||Thermocoil, stainless steel ||Thermocoil, stainless steel |
|Pump ||Dual Italian pumps ||15 bar Italian pump ||15 bar Italian pump |
|Wattage ||1700W ||1600W ||1600W |
|Water tank ||84 fl. oz. top-fill and rear-fill ||67 fl. oz. top-fill with handle ||61 fl. oz. top-fill with handle |
|Accessories ||2 x 58mm dual wall filter baskets, 2 x 58mm single wall filter baskets, 58mm integrated tamper, stainless steel milk jug, cleaning tool, cleaning disc and tables, allen key, water filter holder and filters, coffee scoop ||2 x 54mm dual wall filter baskets, 2 x 54mm single wall filter baskets, 54mm integrated tamper, stainless steel milk jug, cleaning kit, water filter holder and filter, precision dose trimming tool ||2 x 54mm dual wall filter baskets, 2 x 54mm single wall filter baskets, 54mm integrated tamper, stainless steel milk jug, cleaning tool, cleaning disc and tables, allen key, water filter holder and filter, coffee scoop |
|Auto purge? ||Not required ||Yes ||Yes |
|Steam wand ||360 degree swivel, 3 hole tip ||360 degree swivel, 1 hole round tip for easier cleaning ||360 degree swivel, 1 hole tip |
|Other ||Over-pressure valve (OPV), actively heated group head, heat exchanger (HX), programmable extraction temps, programmable pre-infusion, backlit LCD, espresso shot clock, auto start, audio alerts (high, low, mute), drop down swivel foot ||.5 lb bean hopper, conical burr grinder, grind size dial, grind amount dial, hands-free grinding cradle || |
|Housing ||Stainless steel; parts that come in contact with water, coffee, and milk are BPA free ||Stainless steel; parts that come in contact with water, coffee, and milk are BPA free ||Stainless steel; parts that come in contact with water, coffee, and milk are BPA free |
Compare the Barista Express (BES870XL) with other Breville espresso machines
All three machines have an electronic PID temperature control system for better temperature stability; a pressure gauge; volumetric control that is either preset, manual over-ride, or reprogrammable; a dry puck feature; a dedicated outlet for hot water; a cleaning alert; a concealed storage tray; and a Breville assist plug. All three machines also have a pre-infusion process that begins with low pressure and gradually ramps up, to gently expand grinds for more even extraction.