V1.4
Assumed worst-case starting point: indoor and outdoor humidity are the same, use max RH and temps expected, the default output is based on achieving the target level within 24 hours. You can experiment with various inputs. To meet the recurring dehumidification but assuming you start already at the target RH%, use the output called TOTAL RECURRING LOAD and convert to pints per day using a multiplier of 2.21. Don't forget that most dehumidifier manufacturers rate capacity at AHAM conditions of 80F & 60%RH, thus the published capacity must be de-rated since real capacity at real conditions will be lower than capacity at AHAM ratings. Consult with the manufacturer to learn the real capacity at your conditions or de-rate the dehumidifiers published capacity by 20-25%.

Inputs - Fill in all blue cells

INPUTS Value

Indoor Temperature Target °F

°F

Max Outdoor Humidity (RH%)

%

Indoor Humidity Target (RH%)

%

Outdoor Temperature °F

°F

Indoor Volume in Cubic Ft. (W*D*H)

FT^3

Occupants

Persons

Latent heat per occupant BTU

200 BTHh (ACCA Manual J v8)

ACH

air changes per hour

ERV Efficiency % ΔT RH (If applicable)

if no ERV use 0

Results in green cells

OUTPUTS

Indoor volume in M^3

M^3

ACH M^3/h

M^3/h

ACH CFM

CFM air change

Baseline Dehumidification Required 24 hr recovery

kg/ day

Baseline Hourly for 24 hr recovery

kg/ hour

Ingress Humidity (absolute)

kg/day

Ingress Humidity (absolute)

kg/hour

Internal Latent Loads (absolute)

kg/hour

Internal Latent Loads (absolute)

kg/ day

TOTAL INITIAL LOAD MAX

kg/day

TOTAL RECURRING LOAD NOMINAL

kg/day

TOTAL KG PER DAY

TOTAL kg / day

Pints/Day

Pints per day

Pints/Hour

Pints per hour