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Add dehumidifier to rated home #810

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Add dehumidifier to rated home #810

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0b20bdb
Add dehumidifier to Rated Home
bpark1327 May 8, 2026
d5e658d
Bugfix
bpark1327 May 9, 2026
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21 changes: 21 additions & 0 deletions rulesets/resources/301ruleset.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -2216,6 +2216,27 @@ def self.set_appliances_dehumidifier_reference(orig_bldg, new_bldg)
def self.set_appliances_dehumidifier_rated(orig_bldg, new_bldg)
return if Constants::ERIVersions.index(@eri_version) < Constants::ERIVersions.index('2019AB')

if orig_bldg.dehumidifiers.empty?
dehumidifier_capacity = 60 # pints/day TODO: Replace with Jon's calculation
# https://www.federalregister.gov/documents/2016/08/22/2016-19969/energy-conservation-program-energy-conservation-standards-for-dehumidifiers
if dehumidifier_capacity <= 25.0
dehumidifier_ief = 1.3
elsif dehumidifier_capacity <= 50.0
dehumidifier_ief = 1.6
else
dehumidifier_ief = 2.41
end

new_bldg.dehumidifiers.add(id: "Dehumidifier",
type: HPXML::DehumidifierTypePortable,
capacity: dehumidifier_capacity,
integrated_energy_factor: dehumidifier_ief,
rh_setpoint: 0.60, # TODO: 60% vs 55%
fraction_served: 1.0,
location: HPXML::LocationConditionedSpace)
return
end

orig_bldg.dehumidifiers.each do |dehumidifier|
new_bldg.dehumidifiers.add(id: dehumidifier.id,
type: dehumidifier.type,
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