HVAC, AC BTU, Dehumidifier, CFM and ACH Calculators

Estimate a room air conditioner BTU range from room size, ceiling height, sun, occupants, kitchen heat and insulation.

Estimate window AC size and review oversizing, humidity, window fit, CEER/EER, noise, drainage and installation limits.

Estimate portable AC capacity and understand SACC, BTU labels, hose losses, exhaust sealing and product label checks.

Convert BTU per hour to cooling tons and thermal kW without treating the result as central HVAC sizing.

Estimate dehumidifier pints/day by room area, dampness level, basement condition, temperature, water intrusion and drain access.

Estimate basement dehumidifier size with water intrusion, cool temperature, continuous drain and mold-remediation boundaries.

Calculate CFM from room volume and target ACH while avoiding duct-design and code-compliance claims.

Calculate air changes per hour from CFM and room volume.

Estimate bathroom fan CFM using area and fixture rules plus duct, fan rating and local-code caveats.

Estimate garage ventilation CFM by ACH with explicit CO, combustion appliance and code-compliance boundaries.

Estimate room ventilation airflow from room volume and target ACH.

Convert BTU/h to cooling tons.

Convert BTU/h to thermal kW and explain why it is not electrical input.

Convert dehumidifier pints/day and liters/day while distinguishing capacity from bucket volume.

Guide to how many btu per square foot? with formulas, examples, source notes and professional boundaries.

Guide to why oversized ac does not dehumidify with formulas, examples, source notes and professional boundaries.

Guide to portable ac sacc vs btu with formulas, examples, source notes and professional boundaries.

Guide to 30 pint vs 50 pint dehumidifier with formulas, examples, source notes and professional boundaries.

Guide to what size dehumidifier for basement? with formulas, examples, source notes and professional boundaries.

Guide to cfm vs ach with formulas, examples, source notes and professional boundaries.

Guide to bathroom fan cfm guide with formulas, examples, source notes and professional boundaries.

Guide to what is ac tonnage? with formulas, examples, source notes and professional boundaries.

Guide to dehumidifier pints explained with formulas, examples, source notes and professional boundaries.

Worked room AC sizing example for a 150 sq ft room.

Worked room AC sizing example for a 300 sq ft room.

Worked room AC sizing example for a 500 sq ft room.

Portable AC label interpretation for 14,000 BTU units and SACC caveats.

Worked dehumidifier sizing example for a 1000 sq ft basement.

Worked bathroom fan sizing example for a small bathroom.