10
When running a large bypass evaporative humidifier without the furnace (100% fan-only), more time is required (18.4 hours) to deliver the 6.5
gallons of humidity. During that time, 64.2 gallons of water are consumed of which only 6.5 gallons per day go into the air as humidity. That
equals 1926 gallons per month of heated water that the homeowner is paying for, with only 195 gallons going into the air as humidity.
Next, we will review how TrueSTEAM HM509 achieves the output requirement in this example.
How TrueSTEAM HM509 achieves output requirements.
TrueSTEAM HM509 runs at maximum efficiency regardless of air temperature. Because it has a heating element to turn water to vapor,
TrueSTEAM does not waste furnace BTUs to deliver the 6.5 gallons of humidity the 2000 ft
2
home requires.
The TrueSTEAM heating element uses 1100 watts and the system fan will run 17
hours to deliver the 6.5 gallons of humidity. A total of 6.5 gallons of water will be
used, with all of it going into the air as humidity – that is up to 90% less water than
what the large bypass uses. And because it is cold water that is going into the
humidifier, the homeowner doesn’t incur the extra cost of externally heating the water.
NOTE: TrueSTEAM output is rated with inlet water temperature of 60°F.
Using the national averages listed, Chart 3 shows the daily operating costs for a
TrueSTEAM HM509 to achieve 35%RH in a 2000 ft
2
home.
Chart 4: How does this example's daily costs compare?
Chart 3: TrueSTEAM operating costs to achieve
output requirement in this example. (for details
see Appendix B)
Total TrueSTEAM
®
operating costs
cost/day
Blower electrical $0.78
Water $0.05
Heater electrical $2.06
TOTAL $2.89
Total daily
operating cost
Cost of evaporative
bypass vs. TrueSTEAM
TrueSTEAM HM509 $2.89 –
Bypass model with gas water heater
and 6 hours of heating per day
$2.60 Bypass $0.29 less
Bypass model with gas water heater
and no heating requirements
$3.31 Bypass $0.42 more
Bypass model with electric water heater
and 6 hours of heating per day
$3.70 Bypass $0.81 more
Bypass model with electric water heater
and no heating requirements
$4.62 Bypass $1.73 more
Electric heating and water heating
cost/day
Blower electrical $0.82
Water $0.39
Electric for humidifier $1.82
Electric for hot water $1.59
TOTAL $4.62
Natural gas heating and water heating
cost/day
Blower electrical $0.82
Water $0.39
Electric for humidifier $1.13
Electric for hot water $0.98
TOTAL $3.32
Chart 2: Large Bypass operating costs when humidifying without heating cycles using HVAC fan only.
(for details see Appendix B)
To Next Page
Loading...
Need help?
General
