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Home / Calculators / Room AC Tonnage Sizer
Load & Sizing โœ“ ISO/ASHRAE Thermodynamic Math โ€ข Calibrated for 42ยฐC Tropical Ambient

Room AC Tonnage Sizer

Calculate accurate AC tonnage and BTU heat load for any room or office in Pune. Calibrated for peak summer ambient conditions.

โšก Live Interactive Computation Engine โœ“ Real-Time Field Calibrated
Recommended AC Capacity
1.5 Ton
18,000 BTU/hr Heat Load
Standard floor area: 168 sq.ft โ€ข Indian Peak Summer Tested
โšก 60-Second Express Engineering Callback Average Response: 42 seconds
Governing Formula:
Tons = (Area ร— 25 BTU ร— Sun Multiplier + (Occupants - 2) ร— 600) / 12,000
Pune Field Notes & Environmental Standards:

Calibrated for Indian tropical peak summer (42ยฐC ambient in Pune). Standard residential room height assumed at 10 feet.

Technical Engineering Guide & Field Diagnostic Practices

Choosing the correct air conditioner tonnage is critical for energy efficiency, adequate dehumidification, and compressor longevity. An undersized unit runs continuously without reaching the set temperature, spiking electricity bills. An oversized unit cools too rapidly without removing latent moisture, resulting in cold, clammy air and frequent compressor short-cycling.

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