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Page 15
2008-10-01
6. STEAM INSTALLATION GUIDELINES
(1) The GS Series humidifier comes with a single steam outlet on all capacities. The GS
100, 200/300, 400/500/600 have respectively (1.75” (4.4 cm) O.D., 3” (7.6 cm) O.D.
and 4” (10.16) O.D.). Consult option and accessories section for more details. Refer
to the Steam Absorption and Distribution Manual, Form #XX-231 for design of the
steam distribution system.
7. CALCULATION OF ANNUAL OPERATING COSTS
A. Natural Gas Humidifier
(1) Annual operating cost equals: annual hours of operation, times energy cost, times
humidifier capacity.
(a) Example: GS 100
(b) Natural gas cost $4.50 (U.S.) per million BTU
(c) $0.45 (U.S.) per Therm (100,000 BTU)Annual hours of operation = 2000 at full
output (Equivalent to comfort humidification in upper mid-west.)
(d) Input of humidifier = 140,000 BTU/hr
(e) Total energy used = 2000 x 140,000 = 280,000,000 BTU
(f) Annual Cost = 238 x 4.50 = $1260.00
B. Electric Gas Humidifier
(1) Annual operating cost equals: annual hours of operation, times energy cost, times
humidifier capacity.
(a) Example: NHMC 100
(b) Electricity cost (usage charge) $0.08 per kw/hr.
(c) Annual hours of operation = 2000 at full output (Equivalent to comfort
humidification in mid-west.)
(d) Input of humidifier = 34 kw
(e) Total energy used = 2000 x 34 = 68,000 kw/hr
(f) Annual Cost = 68,000 x 0.08 = $5,440.00
C. Operating Cost Savings
(1) Gas vs Electric = more than 4 times the operating cost.