Method notes

Sources and Methodology

IndoorComfortKit is built for household estimates from measurements a reader can take at home. The calculators are intentionally narrow: they help decide what to check next, not whether a room is certified safe or whether equipment is approved for installation.

Indoor humidity and moisture

The humidity and moisture pages use the EPA mold and moisture guide as general U.S.-oriented background. The practical reading is simple: moisture control matters, repeated dampness deserves attention, and direct water sources should be fixed before relying on equipment.

The site uses common household bands such as a comfortable middle range around 30% to 50% relative humidity and extra attention when readings stay high. Local climate, building assemblies, ventilation habits, and season can change what is realistic.

Dew point

The dew point calculator uses a common Magnus approximation from room temperature and relative humidity. It estimates the air temperature where condensation can begin, but it does not measure the actual temperature of glass, trim, walls, ducts, or hidden materials.

For condensation questions, compare the estimated dew point with the coldest likely surface. A room can have a moderate reading in the center while a window edge or exterior corner is cold enough to get wet.

Room AC BTU estimates

The AC calculator uses floor area as the main input, then adjusts for sun exposure, ceiling height, occupants, and kitchen heat. The U.S. Department of Energy commonly frames room air conditioner sizing around 20 BTU per square foot as a simple starting point. IndoorComfortKit uses a slightly higher planning baseline with adjustment factors so the result can act as a shopping comparison, not as an engineering design.

AC results are not Manual J load calculations, electrical reviews, installation approvals, lease approvals, or manufacturer recommendations. Product labels, voltage, window support, climate, insulation, and local rules still matter.

Dehumidifier capacity estimates

Dehumidifier sizing uses room area and observed dampness level as the main inputs. ENERGY STAR explains that dehumidifier capacity is commonly measured in pints per 24 hours and depends on both the size of the space and the conditions in that space.

The calculator gives a starting size class. Product labels, test standards, room temperature, drain setup, fan speed, outdoor climate, and whether doors stay open can change real performance. Active leaks, standing water, wet materials, or drainage problems should be corrected first.

What the calculators do not do

The calculators do not diagnose mold, inspect hidden moisture, test air quality, approve electrical work, certify safety, or replace a professional HVAC design. They also do not know local code, lease rules, product-specific instructions, or hidden construction details.

Official references

Last reviewed: 2026-06-14