PUN-1 in Hinjewadi is the smallest building Iron Mountain operates in India: 1.6 to 2 MW, 532 racks across three server halls, on a 1.2-acre site 18 kilometres from Pune International Airport. At 1.6 MW over 532 racks the density is 3.0 kW per rack — enterprise fractional colocation, not hyperscale. The record is interesting for two reasons. The operator publishes two different capacities and two different floor areas for the same building, and the resulting density is 39.9 to 42.1 watts per square foot either way — so the conflict does not change the engineering conclusion. And in Pune, the biggest published campus is 40 MW: twenty times this building.
1At a glance
2Two sets of numbers for one small building
| Source | Capacity | Floor area | Site |
|---|---|---|---|
| Iron Mountain Pune facility page | 1.6 MW | 38,000 sq ft / 3,530 m² | 1.2 acres |
| Iron Mountain India and Asia-Pacific pages | 2 MW | 50,186 sq ft | not stated |
| Web Werks Pune page | 1.6 MW | — | 1.2 acres |
| Third-party directory | 2.0 MW | 50,186 sq ft | — |
| Web Werks Delhi landing page (asset list) | 5 MW | 38,000 sq ft | — |
| This registry | 2 MW | 50,186 sq ft | — |
Capacity and area disagree together, and they disagree in the same direction. 1.6 MW over 38,000 sq ft is 42.1 W per sq ft. 2 MW over 50,186 sq ft is 39.9 W per sq ft. The density conclusion is identical either way, and density is what tells a buyer what the building is.
The 5 MW figure on one Web Werks asset list is the outlier that does matter: it is 2.5 times every other published figure for the same building and appears on a page listing several facilities. It is excluded.
The registry carries 2 MW and 50,186 sq ft because that is the pair on the operator’s most current platform pages, and it records the conflict rather than hiding it.
The up to 10 MW expansion figure on the facility FAQ is the other number to treat carefully. On a 1.2-acre site that would be 8.3 MW per acre — better than AirTrunk’s Mahape at 9.0 and second only to the densest Mumbai builds. Nothing about a G+1 building on 1.2 acres suggests that, and the same operator’s own Web Werks page says phased scaling up to 2 MW.
3Five hundred and thirty-two racks
Rack count is the figure that reveals what kind of business a building is running, and PUN-1 is the low end.
| Facility | Racks | Capacity | kW per rack |
|---|---|---|---|
| MSE at NTT Chandivali | — | — | 17.2 |
| NTT Mumbai 8 | 2,800 | 36 MW facility | 12.9 |
| NTT Mumbai 9 | 6,000 | 62 MW facility | 10.3 |
| NTT Chennai 2A | — | 17.4 MW | 6.96 |
| NTT NAV1A | 5,000 | 30 MW IT | 6.0 |
| Iron Mountain PUN-1 | 532 | 1.6 MW | 3.0 |
Three kilowatts per rack is a fractional-colocation business: single cabinets, cages, enterprise tenants with a handful of racks each. It is a completely different sale from a 17 kW AI cabinet, and it carries a different contract length, a different churn profile and a different price per kilowatt.
That is also why PUN-1 is small and will stay small. The building was designed for a rack density the market has moved past, and the 1.2-acre site cannot support the power to retrofit it. 532 racks at 17.2 kW would be 9.1 MW — five times the building’s published capacity, on the same cabinets.
Read across the table and the whole Indian market is visible. The same physical cabinet, the same floor plate, the same country: 3 kW in Hinjewadi, 17.2 kW in Chandivali. That is a 5.7-fold difference in revenue per rack slot.
Any dataset that counts megawatts without counting racks will value these two buildings the same. They are not the same.
4Pune against Pune
| Record | MW | Status | Note |
|---|---|---|---|
| STT Pune (PRJ-123) | 40 | Announced build | The city’s largest published figure |
| Iron Mountain PUN-1 | 2 | Operating | 5% of the STT figure |
| Ratio | 20:1 | — | Published against operating |
| Maharashtra counted total | 786.4 | — | PUN-1 is 0.25% |
| PUN-1 at its 10 MW ceiling | 10 | Unsupported claim | Would still be a quarter of STT Pune |
Pune is the fourth market in Maharashtra and the smallest by counted capacity. Twenty to one is the same ratio this registry found in Navi Mumbai between published and live capacity, and it is becoming the defining statistic of the Indian market: announcements run about twenty times ahead of energisation.
For a buyer, the useful question in Pune is not who has announced capacity. It is who has a substation.
5Procurement
6Limits and open questions
- Two capacities and two floor areas are published for the same building. The registry uses 2 MW and 50,186 sq ft and records both.
- A 5 MW figure on one Web Werks asset page is excluded as an outlier at 2.5 times every other source.
- The 10 MW expansion claim comes from a facility FAQ and is contradicted by the operator’s own Web Werks page saying 2 MW.
- 532 racks is a published count; the traffic per rack is derived by division and assumes all racks are populated.
- 1.6 MW against 532 racks assumes IT load rather than facility load; if it is facility power the true density is lower still.
- 2 MW is counted. The higher published figure is used, which is the conservative treatment for a state total.
- What would close it. One capacity, one area, one expansion ceiling.
7Sources
Sources: the Iron Mountain Pune location page; the Iron Mountain India platform page; the Iron Mountain Asia-Pacific locations page; the Web Werks Pune facility page; the Web Werks Delhi landing page asset list; and PeeringDB and directory entries for PUN-1.