Rittal enclosure air conditioners cross to the Pfannenberg DTS series for side mount, the DTT series for top mount, and the DTI series for internal and recessed mount. The tables below cover Blue e+, Top Therm Blue e and internal mount models, compared at the 95°F/95°F rating point, with the Pfannenberg adapter plate part numbers that make specific retrofits bolt over the existing cutout.
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Rittal side mount to Pfannenberg cross reference
| Model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | NEMA type | Pfannenberg cross |
|---|---|---|---|---|---|
| SK 3178.80x | 1,024 | 1,030 | 110/240 | 12R, 3R | DTS 3021/3031 |
| SK 3302-xyz | 1,092 | 1,170 | 115/230 | 12 | DTS 3021/3031 |
| SK 3179-xyz | 1,774 | 1,774 | 110/240/460 | 12R, 3R | DTS 30X1 |
| SK 3303-xyz | 1,877 | 2,252 | 110/240 | 12, 4X | DTS 30X1 |
| SK 3361-xyz | 2,900 | 3,037 | 110/240/460 | 12 | DTS 30X1 |
| SK 3312-xyz (IT rack) | 3,000 | 3,000 | 110/240/460 | — | DTS 31X1 |
| SK 3184-xyz | 3,412 | 3,315 | 110/240/460 | 12R, 3R | DTS 31X1 |
| SK 3304-xyz | 4,299 | 4,265 | 110/240/460 | 12, 4X | DTS 31X1 |
| SK 3366-xyz (internal mount) | 4,265 | 5,459 | 230/460 | 12 | DTS 31X1 SL |
| SK 3185-330 | 5,459 | 5,459 | 110/240/460 | 12R, 3R, 4 | DTS 31X1 SL |
| SK 3185-xyz | 5,459 | 5,459 | 110/240/460 | 12R, 3R | DTS 31X5 |
| SK 3305-xyz | 5,494 | 5,494 | 110/240/460 | 12, 4X | DTS 31X5 |
| SK 3186-330 | 6,824 | 6,824 | 110/240/460 | 12R, 3R, 4 | DTS 31X5 |
| SK 3328-xyz | 8,325/7,677 | 8,325/7,677 | 110/240/460 | 12, 4X | DTS 32X1 |
| SK 3187-330 | 8,530 | 8,530 | 110/240/460 | 12R, 3R, 4 | DTS 32X1 |
| SK 3187-xyz | 8,872 | 8,872 | 110/240/460 | 12R, 3R | DTS 32X5 |
| SK 3329-xyz | 9,247 | 9,247 | 110/240/460 | 12, 4X | DTS 32X5 |
| SK 3312-810 (IT rack) | 10,236 | 10,236 | 110/240/460 | 12 | DTS 32X5 |
| SK 3332-xyz | 13,478 | 14,843 | 460 | 12 | DTS 34X1C |
| SK 3188-330 | 12,966 | 12,966 | 460 | 12R, 3R, 4 | DTS 34X1C |
| SK 3188-xyz | 14,331 | 14,341 | 460 | 12R, 3R | DTS 34X1C |
| SK 3189-330 | 17,061 | 17,061 | 460 | 12R, 3R, 4 | DTS 34X1C |
| SK 3189-xyz | 19,790 | 19,753 | 460 | 12R, 3R | DTS 34X1C |
The X position in a Pfannenberg DTS model number is the voltage code. Example: DTS 31X1 is the 4,000 BTU/hr side mount family; the exact orderable part number depends on 115, 230 or 460V. Send the voltage and we return the full part number.
Adapter plates for Rittal retrofits
These Pfannenberg adapter plates cover the existing Rittal mounting cutout, so the replacement bolts over the opening instead of requiring new panel work. We confirm the plate and unit pairing on the quote.
| Rittal model being replaced | Pfannenberg adapter plate P/N |
|---|---|
| SK 3303-xyz | 18380000036 |
| SK 3304-xyz | 18380000027 |
| SK 3305-xyz | 18380000027 |
| SK 3328-xyz | 18380000028 |
| SK 3329-xyz | 18380000044 |
| SK 3366-xyz (internal mount) | 18380000043 |
Rittal top mount to Pfannenberg cross reference
| Model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | Pfannenberg cross |
|---|---|---|---|---|
| SK 3382-xyz | 2,116 | 2,116 | 115/230 | DTT 6201 |
| SK 3359-xyz | 2,696 | 2,696 | 115/230 | DTT 6201 |
| SK 3383-xyz | 3,719 | 4,436 | 110/240/460 | DTT 6301 |
| SK 3185-730 | 4,436 | 4,436 | 110/240/460 | DTT 6301 |
| SK 3273-xyz | 4,095 | 4,095 | 230 | DTT 6301 |
| SK 3384-xyz | 5,630 | 5,630 | 110/240/460 | DTT 6401 |
| SK 3385-xyz | 7,302 | 7,302 | 110/240/460 | DTT 6401 |
| SK 3386-xyz | 11,260 | 11,260 | 460 | DTT 6601 |
| SK 3386-xyz | 13,649 | 13,649 | 460 | DTT 6801 |
The Pfannenberg DTT top mount range runs from the DTT 6101 at 1,785 BTU/hr to the DTT 6801 at 14,000 BTU/hr.
Rittal internal and recessed mount to Pfannenberg DTI
Rittal internal mount and recessed units cross to the Pfannenberg DTI partially recessed series. The DTI lineup runs DTI 6301 (5,286), DTI 6401 (6,820), DTI 6501 (8,525) and DTI 6801 (13,640 BTU/hr at 95/95), with the DTI 6201 below them and compact C variants available. All DTI units are 230 or 460V, NEMA Type 12; a 115V recessed application needs a different approach, ask. Cutout dimensions are confirmed on the quote.
| Rittal model | Published BTU/hr | BTU/hr at 95/95 curve | Pfannenberg DTI cross |
|---|---|---|---|
| SK 3304-xyz | 4,299 | 4,265 | DTI 6301 |
| SK 3366-xyz | 4,265 | 5,459 | DTI 6301 |
| SK 3185-xyz | 5,456 | 5,456 | DTI 6401 |
| SK 3305-xyz | 5,494 | 5,494 | DTI 6401 |
| SK 3186-xyz | 6,820 | 6,820 | DTI 6401 |
| SK 3328-xyz | 8,325/7,677 | 8,325/7,677 | DTI 6501 |
| SK 3187-xyz | 8,866 | 8,866 | DTI 6501 |
| SK 3329-xyz | 9,247 | 9,247 | DTI 6801 |
| SK 3332-xyz | 13,478 | 14,843 | DTI 6801 |
| SK 3188-xyz | 14,322 | 14,322 | DTI 6801 |
Rittal -xyz suffix decoder
| Position | Meaning |
|---|---|
| x (material) | 3 = aluminum outdoor, 5 or 6 = stainless steel, 8 or 9 = carbon steel |
| y (voltage) | 0 = 230 VAC, 1 = 115 VAC, 4 = 460 VAC |
| z (rating) | 0 = NEMA 12, 4 = NEMA 4X |
Compare capacity at 95°F/95°F, not the nameplate
Enclosure air conditioner ratings are not published at a single standard condition, so nameplate BTU/hr numbers across brands are not directly comparable. The honest comparison is capacity at 95°F ambient and 95°F enclosure temperature, read off the manufacturer's performance curve. A unit sold as 3,900 BTU/hr can deliver 3,400 BTU/hr at the 95/95 point. Every table on this page shows both numbers.
Four things have to line up before a substitution is valid:
- Capacity at the rating point. Match 95/95 performance, not marketing BTU.
- Voltage. 115, 230 or 460V must match the nameplate.
- Enclosure rating. NEMA Type 12, 3R, 4 or 4X on the air conditioner must match the enclosure environment.
- Mounting cutout. A capacity cross is not a cutout cross. Pfannenberg adapter plates exist for specific Hoffman retrofits; otherwise plan the panel work.
Also check where the cold air supply sits relative to the hot air return. Several competitor designs place them within 2 to 6 inches of each other, which lets cold discharge short-cycle straight back into the return and cuts effective cooling.
Common questions
What is the Pfannenberg equivalent of the Rittal SK 3304?
The Pfannenberg DTS 31X1. The SK 3304 publishes 4,299 BTU/hr and delivers 4,265 at the 95F/95F point; the DTS 31X1 publishes 4,000 and delivers 4,100 at the same point. Pfannenberg adapter plate P/N 18380000027 covers the existing SK 3304 cutout for a bolt-over retrofit.
Do adapter plates exist to replace a Rittal air conditioner with a Pfannenberg?
Yes. Pfannenberg adapter plates cover the existing Rittal cutout for specific retrofits: P/N 18380000036 for the SK 3303, P/N 18380000027 for the SK 3304 and SK 3305, P/N 18380000028 for the SK 3328, P/N 18380000044 for the SK 3329, and P/N 18380000043 for the SK 3366 internal mount. The plate lets the Pfannenberg unit mount over the existing opening.
What is the Pfannenberg equivalent of a Rittal Blue e+ air conditioner?
Blue e+ models from the SK 3178 through the SK 3189 cross to the Pfannenberg DTS series by capacity at the 95F/95F point, from the DTS 3021/3031 up to the DTS 34X1C. Check the enclosure rating line: many Blue e+ listings carry NEMA 12R and 3R, while the DTS series carries Type 12, 3R, 4 and 4X across the range.
Can Pfannenberg replace a Rittal internal mount or recessed air conditioner?
Yes, with the DTI series. The DTI 6201 through DTI 6801 cover roughly 3,900 to 13,600 BTU/hr at the 95F/95F point in 230 or 460V, and adapter plate P/N 18380000043 covers the SK 3366 opening. The DTI series does not offer 115V, so a 115V recessed application needs a different approach. Cutout dimensions are confirmed on the quote.
Comparing another brand? Start at the enclosure air conditioner cross reference hub.
Get a cross-referenced quote
Send the model number off the nameplate and the voltage. We come back with the Pfannenberg cross, the adapter plate if one exists for the retrofit, and a price inside 48 hours.
Email: christian.lauderback@appliedcontrolinc.com
Phone: 248-425-9065
HOFFMAN, SpectraCool and ProAir are trademarks of nVent or its affiliates. SCE and Enviro-Therm are trademarks of Saginaw Control & Engineering. RITTAL, Blue e and Blue e+ are trademarks of Rittal GmbH & Co. KG. IceQube, Kooltronic, Seifert and Thermal Edge are trademarks of their respective owners. Pfannenberg is a registered trademark of Pfannenberg GmbH. Applied Control Inc. is an authorized Pfannenberg manufacturers' representative and is not affiliated with, endorsed by, or sponsored by any competitor manufacturer named on this page. Competitor part numbers appear here solely to identify products for comparison. Capacities are compared at the 95°F ambient / 95°F enclosure rating point using publicly available performance data and are subject to change. Verify current specifications against the manufacturer’s own datasheet before purchase or installation.
