| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:28.25 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Backstroke | 1:32.31 | 2025 Alan Swanston Classic | 2025-12-05 |
| 100m Breaststroke | 1:49.99 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Breaststroke | 1:47.87 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Butterfly | 1:36.43 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 100m Butterfly | 1:29.63 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m Freestyle | 1:18.64 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 100m Freestyle | 1:18.47 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 100m IM | 1:39.02 | RHAC Fall Classic 2025 | 2025-10-24 |
| 200m Backstroke | 3:17.26 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Backstroke | 3:17.80 | 2025 Alan Swanston Classic | 2025-12-05 |
| 200m Breaststroke | 3:58.59 | MAC Rising Star #1 | 2025-11-08 |
| 200m Freestyle | 3:05.53 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 200m Freestyle | 2:56.15 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 200m IM | 3:14.03 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 200m IM | 3:30.52 | MAC Rising Star #1 | 2025-11-08 |
| 400m Freestyle | 6:45.38 | 2025 Alan Swanston Classic | 2025-12-05 |
| 50m Backstroke | 50.31 | MAC Rising Star #2 | 2025-05-30 |
| 50m Backstroke | 47.83 | RHAC Fall Classic 2025 | 2025-10-24 |
| 50m Breaststroke | 51.50 | RHAC Winter Invitational 2026 | 2026-01-16 |
| 50m Breaststroke | 47.60 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Butterfly | 40.20 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 50m Butterfly | 39.54 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
| 50m Freestyle | 35.76 | 2026 Mallards Winter LC Invitational | 2026-01-30 |
| 50m Freestyle | 35.54 | 2026 Central Region Div 2 SC Championships | 2026-02-20 |
Duan, Nathaniel's top personal bests include 100m Backstroke (1:28.25), 100m Backstroke (1:32.31), 100m Breaststroke (1:49.99), 100m Breaststroke (1:47.87), 100m Butterfly (1:36.43).
Duan, Nathaniel swims for Aurora Ducks Swimming Club.
Duan, Nathaniel has competed in 9 meets.