Aprilaire 1850 Dehumidifier User Manual


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DUCTING TO HVAC SYSTEM – BASEMENT AND ATTIC INSTALLATIONS
The Preferred Installation is to duct the dehumidifier to pull air from and return dehumidified air to the HVAC return duct. This installation will
ensure warm, dehumidified air is thoroughly mixed with the HVAC system air before being discharged into the living space. Alternatively, the
dehumidifiercanbeductedtodischargetothesupplyduct,buttheexternalstaticpressureoftheHVACsystemmustnotexceed0.4”w.c.forthe
1830and0.6”w.c.forthe1850/1850W.
Required Component
10”Ductwork
Ducting Notes:
•Useinsulatedductwhenthedehumidifierislocatedinanunconditionedspacesuchasanatticoragarage.
•Useaminimumof12”offlexductatthedehumidifierinletandoutlettopreventvibrationnoisetransmission.
•Whenductingreturntoreturn(preferred),thedehumidifiermustbewiredtoturnontheHVACfanwhenoperating(seepage14).
•Whenductingreturntosupply,allowadequatespacebeforethefirstbranchducttoensurethewarmdehumidifiedairisthoroughlymixed
with the HVAC system air.
PLENUM BOX
AIR HANDLER
PLENUM
Model 1830
0.4" w.c. MAX.
Model 1850(W)
0.6" w.c. MAX.
24" MIN.
FILTER
CONDENSATE PAN
10" DIA. INSULATED DUCT
BOTH SIDES
AIR IS
PULLED FROM
RETURN DUCT
HVAC/FURNACE
AIR IS DISCHARGED
TO SUPPLY DUCT
Model 1830
0.4” w.c. MAX
Model 1850(W)
0.6” w.c. MAX
10” DUCT
PLENUM BOX OR Y-FITTING
6 FT. MIN.
AIR HANDLER
FILTER
10" DIA. INSULATED DUCT
BOTH SIDES
CONDENSATE PAN
HVAC/FURNACE
AIR IS PULLED
FROM AND
SUPPLIED TO THE
RETURN DUCT
10” DUCT
DEHUMIDIFIER
6 ft
MIN
FIGURE 11 – Preferred Basement Installation FIGURE 12 – Alternate Basement Installation
FIGURE 13 – Preferred Attic Installation FIGURE 14 – Alternate Attic Installation
90-1886 90-1887
90-1888 90-1889
10
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