The Hoffman SpectraCool G-series crosses to the Pfannenberg DTS side mount series, and every G28 and G52 size has a Pfannenberg adapter plate for a bolt-over retrofit. Capacity is compared below at the 95°F/95°F rating point.
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SpectraCool G-series to Pfannenberg cross reference
| Model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | NEMA type | Pfannenberg cross |
|---|---|---|---|---|---|
| G28-04x6-Gxxx | 3,410/4,600/4,655 | 3,200/4,550/4,500 | 115/230/460 | 12, 3R, 4, 4X | DTS 31X1 (115V), DTS 31X1 SL (230/460V) |
| G28-06x6-Gxxx | 6,000/6,000/5,685 | 6,000/6,000/5,585 | 115/230/460 | 12, 3R, 4, 4X | DTS 31X5 |
| G52-08x6-Gxxx | 6,793/6,800/7,112 | 6,800/7,112/7,195 | 115/230/460 | 12, 3R, 4, 4X | DTS 32X5 |
| G52-12x6-Gxxx | 10,700/9,913/9,757 | 11,200/9,800/9,400 | 115/230/460 | 12, 3R, 4, 4X | DTS 32X5 |
| G57-20x6-Gxxx | 18,000/21,400 | 20,200 | 230/460 | 12, 3R, 4, 4X | DTS 34X1C |
Pfannenberg DTS part numbers carry a voltage code, so a family name such as DTS 31X1 covers the 115, 230 and 460V builds. Where a 95/95 figure is shown as two or three numbers, they are the 115 / 230 / 460V values in that order. Send the voltage and we return the full orderable part number.
Adapter plates for G-series retrofits
| Hoffman model being replaced | Pfannenberg cross | Adapter plate P/N |
|---|---|---|
| G28-04x6-Gxxx | DTS 31X1 SL | 18380000040 |
| G28-06x6-Gxxx | DTS 31X5 | 18380000042 |
| G52-08x6-Gxxx | DTS 32X5 | 18380000045 |
| G52-12x6-Gxxx | DTS 32X5 | 18380000039 |
The plate covers the existing Hoffman cutout so the Pfannenberg unit mounts over the opening. No new cutout, no blanking plate fabrication.
The Pfannenberg DTS side mount range
| Pfannenberg model | Published BTU/hr | BTU/hr at 95/95 curve | Voltages | NEMA type |
|---|---|---|---|---|
| DTS 3021/3031 | 1,200 | 1,194/1,198 | 115/230 | 12, 3R, 4, 4X |
| DTS 3041 | 3,000 | 2,610 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 3061/3081 | 3,000 | 2,382 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 31X1 | 4,000 | 4,100/4,500 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 31X1 SL | 5,000 | 5,097/5,648/5,301 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 31X5 | 7,000 | 6,142/6,995/6,995 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 32X1 | 8,500 | 6,825 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 32X5 | 13,000 | 11,600/11,000/12,000 | 115/230/460 | 12, 3R, 4, 4X |
| DTS 34X1C | 21,000 | 20,840/20,434 | 230/460 | 12, 3R, 4, 4X |
| DTS 36X1C | 29,000 | 25,181/25,526 | 230/460 | 12, 3R, 4, 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 where the curve is published.
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 cover specific retrofits; otherwise send the cutout dimensions with the model number and we confirm the mounting approach on the quote.
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. Pfannenberg DTS units separate supply and return across the full height of the unit.
Common questions
What is the Pfannenberg equivalent of the Hoffman SpectraCool G28?
The G28-04 crosses to the Pfannenberg DTS 31X1 at 115V and the DTS 31X1 SL at 230 and 460V, with adapter plate P/N 18380000040. The G28-06 crosses to the DTS 31X5 with adapter plate P/N 18380000042. At the 95F/95F point the G28-04 delivers 3,200 to 4,550 BTU/hr and the G28-06 delivers 5,585 to 6,000.
What is the Pfannenberg equivalent of the Hoffman SpectraCool G52?
Both G52 sizes cross to the Pfannenberg DTS 32X5, which delivers 11,000 to 12,000 BTU/hr at the 95F/95F point. Adapter plate P/N 18380000045 covers the G52-08 cutout and P/N 18380000039 covers the G52-12. The G52-08 delivers 6,800 to 7,195 at 95/95 and the G52-12 delivers 9,400 to 11,200.
Do the SpectraCool G-series published ratings match the 95F/95F performance?
Not always, and they move in both directions depending on voltage. The G28-04 publishes 3,410 to 4,655 BTU/hr and delivers 3,200 to 4,550 at the 95F/95F point, while the G52-12 publishes 9,757 to 10,700 and delivers 9,400 to 11,200. Compare both numbers before sizing a replacement; the tables on this page show both.
Can a Pfannenberg unit mount in the existing SpectraCool G-series cutout?
Yes, with the adapter plate. Pfannenberg plates 18380000040, 18380000042, 18380000045 and 18380000039 cover the existing G28 and G52 cutouts so the replacement bolts over the opening without new panel work.
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.