AAON · model number decoder
AAON RN Series
AAON's configurable RN rooftop line, built to order from a long feature string. The first 25 characters tell you the size, cabinet, voltage, compressor and condenser type, cooling staging and heat type.
Packaged rooftop unit, heat pump or outdoor air unit · 6–70 tons · R-454B
Sizes and filter sizes
| Size code | Nominal tons | Unit filters (standard 2 in. pleated MERV 8) |
|---|---|---|
| 006 | 6 | (4) 16 x 20 x 2 in. |
| 007 | 7 | (4) 16 x 20 x 2 in. |
| 008 | 8 | (4) 16 x 20 x 2 in. |
| 009 | 9 | (4) 20 x 25 x 2 in. |
| 010 | 10 | (4) 16 x 20 x 2 in. |
| 011 | 11 | — |
| 013 | 13 | — |
| 016 | 16 | (6) 20 x 25 x 2 in. |
| 018 | 18 | (6) 20 x 25 x 2 in. |
| 020 | 20 | (6) 20 x 25 x 2 in. |
| 025 | 25 | (6) 20 x 25 x 2 in. |
| 026 | 26 | (8) 24 x 24 x 2 in. |
| 030 | 30 | (6) 20 x 25 x 2 in. |
| 031 | 31 | (8) 24 x 24 x 2 in. |
| 040 | 40 | (8) 24 x 24 x 2 in. |
| 050 | 50 | (24) 12 x 24 x 2 in. |
| 060 | 60 | (24) 12 x 24 x 2 in. |
| 070 | 70 | (24) 12 x 24 x 2 in. |
Source: RN Series IOM 20260615, pages 25, 132, 135. Factory filter sizes. Check the rack before ordering; filters get changed over the years.
AAON RN Series model number nomenclature
Example: RNA-010-A-A-3-FAA02-CA1B0. Select a position to jump to its codes.
Position 4 is always “-” (separator). Position 8 is always “-” (separator). Position 10 is always “-” (separator). Position 12 is always “-” (separator). Position 14 is always “-” (separator). Position 20 is always “-” (separator). The decoder works with or without it.
Position 1–2 Series and generation
| RN | AAON RN Series |
|---|
RN Series IOM 20260615, page 25
Position 3 Major revision
| A | Major revision A |
|---|
RN Series IOM 20260615, page 25
Position 5–7 Unit size (nominal tons)
| 006 | 6 tons |
|---|---|
| 007 | 7 tons |
| 008 | 8 tons |
| 009 | 9 tons |
| 010 | 10 tons |
| 011 | 11 tons |
| 013 | 13 tons |
| 016 | 16 tons |
| 018 | 18 tons |
| 020 | 20 tons |
| 025 | 25 tons |
| 026 | 26 tons |
| 030 | 30 tons |
| 031 | 31 tons |
| 040 | 40 tons |
| 050 | 50 tons |
| 060 | 60 tons |
| 070 | 70 tons |
RN Series IOM 20260615, page 25
Position 9 Series (cabinet)
| A | A cabinet: 6–8 and 10-ton units |
|---|---|
| B | B cabinet: 9 and 11–15-ton units |
| C | C cabinet: 11–25 and 30-ton units |
| D | D cabinet: 26, 31, 40, 50, 60 and 70-ton units |
RN Series IOM 20251205, page 17
Position 11 Minor revision
| A | Minor revision A |
|---|
RN Series IOM 20260615, page 25
Position 13 Voltage
| 1 | 230 V, single phase, 60 Hz |
|---|---|
| 2 | 230 V, three phase, 60 Hz |
| 3 | 460 V, three phase, 60 Hz |
| 4 | 575 V, three phase, 60 Hz |
| 6 | 380 V, three phase, 60 Hz |
| 8 | 208 V, three phase, 60 Hz |
| 9 | 208 V, single phase, 60 Hz |
RN Series IOM 20260615, page 25
Position 15 A1: Compressor style
| 0 | No compressor |
|---|---|
| F | R-454B two-step scroll compressor |
| G | R-454B digital scroll compressor |
| H | R-454B variable-speed scroll compressor |
| K | R-454B refrigerant-injection variable-speed compressor |
RN Series IOM 20260615, page 26
Position 16 A2: Condenser style
| 0 | No condenser |
|---|---|
| A | Microchannel air-cooled condenser |
| F | Water-cooled condenser |
| J | Alpha Class air-source heat pump (cold-climate version when A1 = H) |
| L | Water-source / geothermal heat pump |
| N | DX air handling unit |
RN Series IOM 20260615, page 26
Position 17 A3: Indoor coil configuration
| 0 | No cooling coil |
|---|---|
| A | Standard evaporator |
| B | 6-row evaporator |
| E | 4-row chilled water coil |
| F | 6-row chilled water coil |
RN Series IOM 20260615, page 26
Position 18 A4: Cooling coil construction
| 0 | Standard |
|---|---|
| A | Polymer e-coated cooling coil |
| B | Stainless-steel cooling coil casing |
| D | E-coated cooling coil and stainless-steel coil casing |
| E | Polymer e-coated condenser coil |
| J | Polymer e-coated evaporator and condenser coils |
| T | Stainless-steel coil casing with e-coated evaporator and condenser coils |
RN Series IOM 20260615, page 26
Position 19 A5: Cooling staging
| 0 | No cooling |
|---|---|
| 2 | 2-stage cooling |
| 4 | 4-stage cooling |
| 5 | 5-stage cooling |
| 6 | 6-stage cooling |
| A | Variable capacity. Smaller units: variable on/off; larger units add tandem on/off compressors (arrangement depends on size) |
| B | Two variable-capacity compressors on 11–25 and 30-ton units; larger units add fixed or two-step compressors |
| C | Variable-capacity compressor plus a two-step compressor (size dependent) |
| F | Chilled water coil: single serpentine, 8 fins per inch |
| G | Chilled water coil: half serpentine, 8 fins per inch |
| H | Chilled water coil: single serpentine, 10 fins per inch |
| J | Chilled water coil: half serpentine, 10 fins per inch |
| K | Chilled water coil: single serpentine, 12 fins per inch |
| L | Chilled water coil: half serpentine, 12 fins per inch |
| R | Heat pump with low-ambient heating |
| S | Heat pump with ultra-low-ambient heating |
RN Series IOM 20260615, page 26
Position 21 B1: Heating type
| 0 | No heat |
|---|---|
| A | Electric heat |
| B | Electric heat (RN horizontal) |
| C | Natural gas |
| D | Natural gas (RN horizontal) |
| F | LP gas |
| G | LP gas (RN horizontal) |
| J | Hot water coil |
| K | Hot water coil (RN horizontal) |
| L | Steam distributing coil |
| M | Steam distributing coil (RN horizontal) |
RN Series IOM 20260615, page 27
Position 22 B2: Heat construction
| 0 | Standard |
|---|---|
| A | Aluminum heat exchanger, gas piping to the valve |
| B | Stainless-steel heat exchanger, gas piping to the valve |
| C | High-altitude aluminum heat exchanger, gas piping to the valve |
| D | High-altitude stainless-steel heat exchanger, gas piping to the valve |
| G | Polymer e-coated heating coil |
| H | Standard-CFM electric heat |
| J | Low-CFM electric heat |
RN Series IOM 20260615, page 27
Position 23 B3: Heat designation
| 0 | No heat |
|---|---|
| 1 | Heat size 1 (capacity depends on unit size and heat type) |
| 2 | Heat size 2 (capacity depends on unit size and heat type) |
| 3 | Heat size 3 (capacity depends on unit size and heat type) |
| 4 | Heat size 4 (capacity depends on unit size and heat type) |
| 5 | Heat size 5 (capacity depends on unit size and heat type) |
| 6 | Heat size 6 (capacity depends on unit size and heat type) |
| 7 | Heat size 7 (capacity depends on unit size and heat type) |
| A | 1-row heating coil |
| E | 2-row heating coil |
RN Series IOM 20260615, page 27
Position 24 B4: Heating staging
| 0 | No heat |
|---|---|
| A | 1 stage |
| B | 2 stages |
| C | 3 stages |
| D | 4 stages |
| E | 5 stages |
| F | 6 stages |
| G | 7 stages |
| H | 8 stages |
| J | 12 stages |
| K | Modulating gas heat, temperature control |
| L | High-turndown modulating gas heat, temperature control |
| M | Modulating SCR electric heat with temperature control |
| N | Modulating SCR electric heat: AAON temperature control, or 0–10 VDC from controls by others |
| P | Heating coil: single serpentine, 8 fins per inch |
| Q | Heating coil: half serpentine, 8 fins per inch |
| R | Heating coil: single serpentine, 10 fins per inch |
| S | Heating coil: half serpentine, 10 fins per inch |
| T | Heating coil: single serpentine, 12 fins per inch |
| U | Heating coil: half serpentine, 12 fins per inch |
| V | 10 stages |
RN Series IOM 20260615, page 28
Position 25 B5: Heat pump auxiliary heat
| 0 | No heat pump |
|---|---|
| 1 | Aux heat 6 for 4-stage heat pump |
| 2 | Aux heat 7 for 4-stage heat pump |
| A | Aux heat 1 for 1-stage heat pump |
| B | Aux heat 2 for 1-stage heat pump |
| C | Aux heat 3 for 1-stage heat pump |
| D | Aux heat 4 for 1-stage heat pump |
| E | Aux heat 5 for 1-stage heat pump |
| F | Aux heat 6 for 1-stage heat pump |
| G | Aux heat 7 for 1-stage heat pump |
| K | Aux heat 1 for 2-stage heat pump |
| L | Aux heat 2 for 2-stage heat pump |
| M | Aux heat 3 for 2-stage heat pump |
| N | Aux heat 4 for 2-stage heat pump |
| P | Aux heat 5 for 2-stage heat pump |
| Q | Aux heat 6 for 2-stage heat pump |
| R | Aux heat 7 for 2-stage heat pump |
| U | Aux heat 1 for 4-stage heat pump |
| V | Aux heat 2 for 4-stage heat pump |
| W | Aux heat 3 for 4-stage heat pump |
| Y | Aux heat 4 for 4-stage heat pump |
| Z | Aux heat 5 for 4-stage heat pump |
RN Series IOM 20260615, page 28
What this page doesn’t cover
- Decodes the first 25 characters of the current R-454B RN feature string (for example RNA-010-A-A-3-FAA02-CA1B0): base model, Model Option A (cooling) and Model Option B (heating). The rest of the string (after the colon: controls, economizer, filters, energy recovery and other features) is not decoded here; check it against AAON's IOM.
- AAON's own sample string in the IOM uses a compressor code (C) that is not in the current compressor list, so our example is assembled from listed codes rather than copied.
- The cabinet series letters (position 9) come from the December 2025 edition of the IOM; the June 2026 Rev B edition still shows the position but drops its legend. The two editions overlap for 11–15-ton units (B and C cabinets).
- Older R-410A RN units use a different model layout (for example RN-025-3-0-...). This decoder does not read those strings.
- Cooling staging codes A, B and C mean different compressor arrangements at different sizes; AAON's IOM has the size-by-size list. Codes N and Q (DX air handler refrigeration circuits) are left out because the current IOM's layout garbles them.
- Filters are the standard unit filters (option 0, 2 in. pleated MERV 8) without return-air bypass. Return-air bypass, 4 in. racks, pre-filters and energy recovery change the count and size. 11 and 13-ton units are left blank because AAON lists them under both the B and C cabinet tables; count the rack.
- AAON does not publish a serial-number date format in the IOM, so there is no serial decoder.
Decoded it on the roof?
Keep it with the unit.
BoltWright keeps every rooftop’s model, serial, history and open findings with the building, so the next tech starts with what the last one knew. Capture works without reception.
See BoltWright →Independent BoltWright reference, not a manufacturer service manual. AAON is named to identify the equipment; no endorsement is implied. Confirm against the unit’s nameplate and AAON’s current literature before ordering parts.
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