support

About Room Comfort Calculators

About the browser-side HVAC calculator hub for room AC sizing, dehumidifier sizing, CFM, ACH and unit conversions.

Direct answer

Room Comfort Calculators provides browser-side tools for early room-level comfort planning. The calculators focus on transparent formulas, visible assumptions, copyable results and source notes so homeowners, renters and small-space planners can compare AC, dehumidifier and ventilation options before buying or asking a professional.

Sources and maintained assumptions

Sizing assumptions are centralized and show source URLs, check dates and notes.

DOE Room Air Conditioners
Checked 2026-05-22. Used for room AC preliminary BTU rule, room-level sizing caveats and oversizing humidity cautions.
DOE Portable Air Conditioners Test Procedure
Checked 2026-05-22. Used for portable AC SACC / label caveats.
ENERGY STAR Certified Dehumidifiers
Checked 2026-05-22. Used for pints/day and product rating caveats.
HVI Bathroom Ventilation
Checked 2026-05-22. Used for residential bathroom fan CFM rules and fixture model.
ACCA Technical Manuals
Checked 2026-05-22. Used to define Manual J, Manual S and Manual D boundaries.
EPA Mold and Indoor Air Guidance
Checked 2026-05-22. Used for mold and water intrusion disclaimers.