Currently, Hottop features three coffee roasters the KN-8828B-2K, the KN-8828P-2K, and the KN-8828B-2K+. Structurally, they are the same appliance. The drum, motors, framework, filters, and most of the electronics are exactly the same parts. The difference between the three models is the design of the control panel and the operation of the user interface and how that interface controls the roaster. We offer this page in order to help you understand the similarities and differences between the models so that you can purchase the roaster that best meets your needs.

FUNCTION	KN-8828B-2K	KN-8828P-2K - DISCONTINUED	KN-8828B-2K+
Profiles and Programmability	Save roasts to memory for recall	Pre-program roast profiles	Save roasts to memory for recall. Can also be used connected to a computer through USB.
Design Concept	Roast beans by time - User has a full control over total roast time, target roasting temperature to end, fan speed, and heater power. These can be easily changed during the roast. The combination of variables that are subject to programming changes are virtually infinite (User should have knowledge of the roasting process to know when to change fan speed and/or heater power in order to control the roast for best results).	Roast beans by temperature - A Program consists of eight segments. Each segment consists of an amount of time, temperature, and fan speed. User predetermines these parameters for each segment and machine will control the temperature. User has a full control of segments when programming the roast, but only can change Target Temperature of each segment once the roast begins.	Roast beans by time - User has a full control over total roast time, target roasting temperature, fan speed, and heater power. These can be easily changed during the roast. The combination of variables that are subject to programming changes are virtually infinite (User should have knowledge of the roasting process to know when to change fan speed and/or heater power in order to control the roast for best results).
Dynamic Roasting Control	The user can change target time, target temperature, fan speed, and heater power at any time during the roast.	Only the target temperature for the active segment can be modified after the roast is started. Binary heat control.	The user can change target time, target temperature, fan speed, and heater power at any time during the roast.
Profile	Adjusted profile can be saved at the end of the roast and played back	Saved profile can be recalled, modified, and replayed	Adjusted profile can be saved at the end of the roast and played back
End of Roast	The roast can be stopped and the beans ejected at any time the user chooses with the press of one button.
Display and User Interface	LED	Large LCD	Advanced LED with wide viewing angle, high contrast, and full roast data displayed in real time
Function Controls	Push buttons are used to select and control all functions	Push buttons are used to select and control all functions	Three push buttons for starting and stopping roasts and approving changes, Four bi-directional, infinite-rotation speed-sensitive knobs for easy and fast parameter changes during the roast (fan speed, temperature control, target temperature, and target time).
Roast Temperature Monitoring	One K-thermocouple	One K thermocouple	Two K thermocouple for separate bean temperature (BT) and environmental temperature (ET) for real-time monitoring. Both temperatures are displayed on the LED screen throughout the roast.
USB Port	No	No	Bi-directional USB port supports third party software for real-time monitoring and graphing of roasts as well as for computer control of the roaster (software links HERE).
Auto Roast Mode with factory installed profile	Yes	Yes	Yes
Manual Roast Mode	Yes	Minimal in-roast manual control	Yes
Available memory locations for storing complete profiles	3	9	3
3 Eject Modes Auto, Push-button, and Manual Emergency	Yes	Yes	Yes
Maximum Roast Time Allowed	25 minutes
Not sensitive to voltage, no variac needed	Works well between about 112 and 125 volts AC.
Temperature safety control	Three separate temperature safety points electronically monitored during the roast, plus fusible link to open heating element circuit in extreme situations for added safety.
Time to roast a batch	Approximately 12-16 minutes depending on mass of beans, roast level desired, and other common factors
Capacity (Optimal)	225-250 grams of green coffee beans (8 to 9 ounces) ( Weighing in grams recommended)		225 up to 300 grams (8 to 11 ounces) ( Weighing in grams recommended)
Owner's Manual	Printed manual included. Download a copy HERE		PDF manual available HERE. Printed manual coming soon
Model Details	Model Details for KN-8828B-2K and KN-8828P-2K PDF Product Sheets Which Model is Best for You?
Replacement Parts	Replacement parts available for purchase on line.
Warranty	One Year Full warranty details available HERE