Capacity Selection Guide - Fedders Herrmidifier Mister 50 User Manual

Air Tightness of Home
Sq. Footage of
Home
1000
1500
2000
2500
3000
4000
The above calculations are for reference only and are based on the following:
• Inside temperature 70° F/35% Relative Humidity
• Outside Temp 20° F /70% Relative Humidity
• 8 foot ceiling height
• Internal moisture gain of one pound per hour
• Furnace on-time of 70%
This chart uses A.R.I. standard designations:
A "Tight Home" is assumed to be well insulated with vapor barriers, tight storm windows and
doors, and a dampered fireplace. Air exchange rate of .5 changes per hour.
An "Average Home" is insulated and has a dampered fire place, but there are no vapor barriers,
storm doors, or storm windows. Air exchange rate of 1.0 change per hour.
A "Loose Home" is generally one constructed before 1930, has little or no insulation, no storm
doors, storm windows, weather stripping or vapor barriers, and often no effective dampering of
fireplaces. Air exchange rate is as high as 1.5 changes per hour.
Tight Home Average Home
(GPD)
0.5
3.0
5.0
7.5
10.0
14.5

Capacity Selection Guide

Loose Home
(GPD) (GPD)
5.0 10.0
10.0 16.5
14.0 24.0
19.0 30.5
23.5 37.5
33.0 51.5
2