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Office Tool · Layout-Aware · BEE 2026

Office AC Tonnage
Calculator

Get a precise cassette AC sizing recommendation for your office. Accounts for layout type, computer heat load, occupancy, floor level, and ceiling height — calibrated for Indian commercial buildings.

4 Layout Types
Equipment Heat Load
Floor Level Factor
CFM Airflow
30W/sq ft
Open Plan Base
Standard office load
400 BTU
Per Person
Occupant heat contribution
300 BTU
Per Computer
Equipment heat load
+15%
Top Floor
Roof heat adjustment
4.8/5

Rated 4.8 out of 5 by 2,340+ users — India's most trusted AC bill calculator

Verified ratings
Reviewed by Sulaiman Sekh — HVAC ExpertS.R EnterpriseHitachi Authorized

8+ years practical experience in AC / Plant Installation, Maintenance and Repair. HVAC Expert at S.R Enterprise under the authorized dealership of Hitachi. All data is verified against 2026 BEE Tariff Orders and manufacturer specifications.

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600 sq ft
10 ft
20 people
15 units

Enter your office details and click Calculate to get recommendations.

How This Calculation Works

Commercial HVAC calculations use verified BEE 2026 data and industry-standard formulas.

1

Select Layout

Open plan, cabin, co-working, or call center.

2

Enter Dimensions

Office area and ceiling height.

3

Set Floor Level

Ground, mid, or top floor heat exposure.

4

Add People & Computers

Occupants and equipment heat loads.

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