Kooltronic enclosure air conditioners cross to the Pfannenberg DTS series for side mount and the DTT series for top mount. The tables below cover the Guardian DP and SP series plus the legacy RP and Series units, compared at the 95°F/95°F rating point off the performance curve.
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Kooltronic side mount to Pfannenberg cross reference
| Model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | NEMA type | Pfannenberg cross |
|---|---|---|---|---|---|
| DP15 (KNA4C1DP15L) | 950 | 950 | 115 | 12, 3R, 4, 4X | DTS 3021/3031 |
| Micro-Mini (KA4C1.0MML) | 1,000 | 850 | 115/230 | 12 | DTS 3021/3031 |
| RP17 (KxA4C2RP17R, legacy) | 2,000 | 1,200 | 115/230 | 12, 3R | DTS 3021/3031 |
| DP17 (KA4C2DP17L, legacy) | 2,000 | 1,500 | 115 | 12, 3R | DTS 30X1 |
| DSP23 (KxA4C2DSP23L) | 2,000 | 2,365 | 115/230 | 12, 3R | DTS 30X1 |
| Narrow-Mini (KA4C2.5NML) | 2,900 | 2,100 | 115 | 12 | DTS 30X1 |
| DP21 (KA4C3DP21L) | 3,000 | 2,100 | 115 | 12, 3R | DTS 30X1 |
| DP21 (KNA4C3DP21L) | 3,000 | 2,350 | 115 | 12, 3R, 4, 4X | DTS 30X1 |
| DP24 (KxNA4C3DP24L) | 3,000 | 2,200 | 230/460 | 12, 3R, 4, 4X | DTS 30X1 |
| RP28 (K2A4C3RP28R, legacy) | 3,000 | 2,220 | 115/230 | 12, 3R | DTS 30X1 |
| Series 21 (KxNA4C3P21L, legacy) | 3,000 | 2,260/2,160 | 115/230 | 4/4X | DTS 30X1 |
| Series 32 (KxNA4C4P32L, legacy) | 4,000 | 2,650 | 115/230 | 4/4X | DTS 30X1 |
| RP33 (KxA4C4RP33R, legacy) | 4,000 | 3,150 | 115/230 | 12, 3R | DTS 31X1 |
| SP28 (KxNA4C4SP28L) | 4,000 | 4,150 | 115/230 | 12, 3R, 4, 4X | DTS 31X1 |
| DP33 (KxA4C5DP33L, legacy) | 5,000 | 4,000 | 115/230 | 12, 3R | DTS 31X1 |
| DP33 (KxNA4C5DP33L) | 5,000 | 4,235 | 115/230 | 12, 3R, 4, 4X | DTS 31X1 |
| RP36 (KxA4C6RP36R, legacy) | 6,000 | 4,500 | 115/230 | 12, 3R | DTS 31X1 SL |
| DP38 (K3A4C5DP38L, legacy) | 5,000 | 4,800 | 460 | 12, 3R | DTS 31X1 SL |
| SP36 (KxNA4C6SP36L) | 6,000 | 5,593 | 115/230 | 12, 3R, 4, 4X | DTS 31X5 |
| DP43 (KxA4C7DP43L, legacy) | 7,000 | 5,500 | 115/230 | 12, 3R | DTS 31X5 |
| Series 38 (K2NA4C7P38L, legacy) | 7,000 | 6,000 | 115/230 | 4/4X | DTS 31X5 |
| Series 59 (K2NA4C7P59L, legacy) | 7,000 | 6,000 | 230 | 4/4X | DTS 31X5 |
| DP52 (K3A4C7DP52L, legacy) | 7,000 | 6,300 | 460 | 12, 3R | DTS 31X5 |
| Series 38 / 47 / 59 (K2NA4C10P38L / P47L / P59L, legacy) | 10,000 | 6,700 | 230 | 4/4X | DTS 31X5 |
| DP47 (KNA4C5DP47L) | 9,000 | 6,711 | 115 | 12, 3R, 4, 4X | DTS 31X5 |
| SP36 (KxNA4C8SP36L) | 8,000 | 7,468 | 115/230 | 12, 3R, 4, 4X | DTS 32X1 |
| DP47L-2 (KNA4C9DP47L-2) | 9,000 | 7,400 | 115 | 12, 3R, 4, 4X | DTS 32X1 |
| DP47 (KxA4C9DP47L, legacy) | 9,000 | 7,400 | 115/230 | 12, 3R | DTS 32X1 |
| SP43 (KxNA4C11SP43L) | 11,000 | 9,148/9,495 | 115/230 | 12, 3R, 4, 4X | DTS 32X5 |
| DP50 | 14,000 | 13,125 | 230/460 | 12, 3R, 4, 4X | DTS 34X1C |
| DP53 | 18,000 | 15,800/16,326 | 230/460 | 12, 3R, 4, 4X | DTS 34X1C |
| DP60 | 26,000 | 18,279/22,242 | 230/460 | 12, 3R, 4, 4X | DTS 36X1C |
| EP56 (K2A6C30EP56zR) | 30,000 | 28,000 | 230 | 12, 3R | DTS 36X1C |
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.
Replacing a legacy Kooltronic unit
A large share of the Kooltronic install base is legacy product: the RP series, early DP builds and the Series 21 through Series 59 units are marked legacy in the table. When one fails, the like-for-like replacement path is gone. The 95/95 column is what to match. Send the full part number off the nameplate and we return the current Pfannenberg DTS unit that covers it, with the mounting approach confirmed on the quote.
Kooltronic top mount to Pfannenberg cross reference
| Model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | Pfannenberg cross |
|---|---|---|---|---|
| KxA4C2.5HSR | 2,500 | 2,085/2,356 | 115/230 | DTT 6201 |
| KxA4C4HTL | 4,000 | 2,250 | 115/230 | DTT 6201 |
| KxA4C5.0H5R | 5,000 | 3,500 | 115/230 | DTT 6201 |
| KA4C6.0H5R-4 / H6R-4 | 6,000 | 3,500 | 115 | DTT 6201 |
| KxA4C6RTL | 6,000 | 6,171/4,600 | 115/230 | DTT 6401 |
| K2A6C12HTL | 12,000 | 11,500 | 230 | DTT 6801 (460V only), consult |
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.
Kooltronic part number decoder
| Position | Meaning |
|---|---|
| K prefix (voltage) | K = 120 VAC, K2 = 230 VAC, K3 = 460 VAC |
| V suffix | NEMA 4X 304 stainless steel cover |
| (legacy) | Discontinued legacy product line |
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 replaces a discontinued Kooltronic legacy air conditioner?
The RP series, early DP builds and the Series 21 through Series 59 units are legacy product, marked in the table. When one fails there is no like-for-like path, so the replacement is sized on the 95F/95F column: send the full part number off the nameplate and we return the current Pfannenberg DTS unit that covers the real operating capacity, along with the mounting approach.
What is the Pfannenberg equivalent of the Kooltronic DP33?
The Pfannenberg DTS 31X1. The current DP33 (KxNA4C5DP33L) publishes 5,000 BTU/hr and delivers 4,235 at the 95F/95F point; the DTS 31X1 delivers 4,100 at the same point. The legacy DP33 (KxA4C5DP33L) delivers 4,000 at 95/95 and takes the same cross.
What is the Pfannenberg equivalent of the Kooltronic DP47?
It depends on the variant. The DP47 builds deliver roughly 6,700 to 7,500 BTU/hr at the 95F/95F point, which lands on the Pfannenberg DTS 31X5 or DTS 32X1 depending on the exact part number. Send the full nameplate part number and we return the correct cross.
What does the K prefix mean on a Kooltronic part number?
The prefix is the voltage: K with no digit is 120 VAC, K2 is 230 VAC, K3 is 460 VAC. A V suffix indicates a NEMA 4X 304 stainless steel cover.
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.