NREL · afontani · Feb 29, 2024 · Jan 19, 2024 · Jan 19, 2024 · Jan 19, 2024
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,8 @@ Features
 Fixes
 - Remove old HPWH options from options_lookup ([#1190](https://github.com/NREL/resstock/pull/1190))
 - Reorganize the emissions and utility rates data folders such that their sources and functions are more clear ([#1195](https://github.com/NREL/resstock/pull/1195))
+- Move location of out-of-unit (shared) water heaters to conditioned mechanical room ([#1201](https://github.com/NREL/resstock/pull/1201))
+
 
 ## ResStock v3.2.0
 ###### December 19, 2023 - [Diff](https://github.com/NREL/resstock/compare/v3.1.1...v3.2.0)

diff --git a/docs/read_the_docs/source/workflow_inputs/characteristics.rst b/docs/read_the_docs/source/workflow_inputs/characteristics.rst
@@ -8105,7 +8105,7 @@ Assumption
 
 - \H2OMAIN does not apply to multi-family, therefore Water heater location for multi-family with in-unit water heater is taken after the combined distribution of other builing types.
 
-- \Per expert judgement, water heaters can not be outside or in vented spaces for IECC Climate Zones 4-8 due to pipe-freezing risk.
+- \out-of-unit water heater is assumed to be in Conditioned Mechanical Room. Per expert judgement, water heaters can not be outside or in vented spaces for IECC Climate Zones 4-8 due to pipe-freezing risk.
 
 - \Where samples < 10, data is aggregated in the following order:
 

diff --git a/docs/read_the_docs/source/workflow_outputs/csv_tables/other_timeseries.csv b/docs/read_the_docs/source/workflow_outputs/csv_tables/other_timeseries.csv
@@ -9,6 +9,7 @@ Temperature: Crawlspace - Unvented,temperature__crawlspace_-_unvented__f,F,"Zone
 Temperature: Crawlspace - Vented,temperature__crawlspace_-_vented__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
 Temperature: Garage,temperature__garage__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
 Temperature: Conditioned Space,temperature__conditioned_space__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
+Temperature: Other Heated Space,temperature__other_heated_space__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
 Temperature: Heating Setpoint,temperature__heating_setpoint__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
 Temperature: Cooling Setpoint,temperature__cooling_setpoint__f,F,"Zone temperatures (in deg-F) for each space (e.g., conditioned space, attic, garage, basement, crawlspace, etc.) plus heating/cooling setpoints."
 Airflow: Infiltration,airflow__infiltration__cfm,cfm,"Airflow rates (in cfm) for infiltration, mechanical ventilation (including clothes dryer exhaust), natural ventilation, whole house fans."

diff --git a/project_national/housing_characteristics/Water Heater Location.tsv b/project_national/housing_characteristics/Water Heater Location.tsv
diff --git a/project_national/resources/options_saturations.csv b/project_national/resources/options_saturations.csv
@@ -12515,11 +12515,11 @@ Level,Parameter,Option,Saturation
 15,Duct Location,None,0.234634
 15,Duct Location,Unheated Basement,0.0900733
 15,Water Heater Location,Attic,0.00898701
+15,Water Heater Location,Conditioned Mechanical Room,0.143277
 15,Water Heater Location,Crawlspace,0.00183731
 15,Water Heater Location,Garage,0.137373
 15,Water Heater Location,Heated Basement,0.110145
 15,Water Heater Location,Living Space,0.438443
-15,Water Heater Location,None,0.143277
 15,Water Heater Location,Outside,0.0731071
 15,Water Heater Location,Unheated Basement,0.0868307
 16,Duct Leakage and Insulation,"0% Leakage to Outside, Uninsulated",0.305757

diff --git a/project_national/resources/source_report.csv b/project_national/resources/source_report.csv
@@ -143,6 +143,6 @@ Vintage ACS,6.0,1.0,sources\pums\pums2019_5yrs\tsv_maker.py,Time period in which
 Water Heater Efficiency,16.0,2.0,sources\recs\recs2020\tsv_maker.py,"The efficiency, type, and heating fuel of water heater.",U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.; (Heat pump water heaters) 2016-17 RBSA II for WA and OR and Butzbaugh et al. 2017 US HPWH Market Transformation - Where We've Been and Where to Go Next for remainder of regions; Penetration of HPWH for Maine (6.71%) calculated based on total number of HPWH units (AWHI Stakeholder Meeting 12/08/2022) and total housing units https://www.census.gov/quickfacts/ME,"Water heater blanket is used as a proxy for premium storage tank water heaters.; Heat Pump Water Heaters are added in manually as they are not in the survey.; Default efficiency of HPWH: Electric Heat Pump, 50 gal, 3.45 UEF.; Due to low sample sizes, fallback rules applied with lumping of:; [1] State: Census Division RECS; [2] State: Census Region[3] State: National"
 Water Heater Fuel,5.0,3.0,sources\recs\recs2020\tsv_maker.py,The water heater fuel type.,U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.,"Due to low sample sizes, fallback rules applied with lumping of:; [1] State: Census Division RECS; [2] Geometry building SF: Mobile, Single family attached, Single family detached; [3] Geometry building MF: Multi-Family with 2 - 4 Units, Multi-Family with 5+ Units; [4] State: Census Region[5] State: National"
 Water Heater In Unit,2.0,3.0,sources\recs\recs2020\tsv_maker.py,Individual water heater present or not present in the dwelling unit that solely serves the specific dwelling unit.,U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.,"Single-Family Detached and Mobile Homes have in unit water heaters.; As Not Applicable option for Single-Family Attached option is 100%; Assuming Single-Family Attached in-unit water heater distribution from RECS 2009; Due to low sample sizes, fallback rules applied with lumping of:; [1] State: Census Division RECS; [2] Vintage ACS: Combining Vintage pre 1960s and post 2000; [3] State: Census Region"
-Water Heater Location,8.0,4.0,sources\recs\recs2020\tsv_maker.py,location of water heater.,U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.,"H2OMAIN = other is equally distributed amongst attic and crawlspace.; H2OMAIN does not apply to multi-family, therefore Water heater location for multi-family with in-unit water heater is taken after the combined distribution of other builing types.; Per expert judgement, water heaters can not be outside or in vented spaces for IECC Climate Zones 4-8 due to pipe-freezing risk.; Where samples < 10, data is aggregated in the following order:; 1. Building Type lumped into single-family, multi-family, and mobile home.; 2. 1 + Foundation Type combined. 3. 2 + Attic Type combined; 4. 3 + Garage combined.; 5. Single-/Multi-Family + Foundation combined + Attic combined + Garage combined.; 6. 5 + pre-1960 combined.; 7. 5 + pre-1960 combined / post-2020 combined.; 8. 7 + IECC Climate Zone lumped into: 1-2+3A, 3B-3C, 4, 5, 6, 7 except AK, 7AK-8AK.; 9. 7 + IECC Climate Zone lumped into: 1-2-3, 4-8."
+Water Heater Location,8.0,4.0,sources\recs\recs2020\tsv_maker.py,location of water heater.,U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.,"H2OMAIN = other is equally distributed amongst attic and crawlspace.; H2OMAIN does not apply to multi-family, therefore Water heater location for multi-family with in-unit water heater is taken after the combined distribution of other builing types.; out-of-unit water heater is assumed to be in Conditioned Mechanical Room. Per expert judgement, water heaters can not be outside or in vented spaces for IECC Climate Zones 4-8 due to pipe-freezing risk.; Where samples < 10, data is aggregated in the following order:; 1. Building Type lumped into single-family, multi-family, and mobile home.; 2. 1 + Foundation Type combined. 3. 2 + Attic Type combined; 4. 3 + Garage combined.; 5. Single-/Multi-Family + Foundation combined + Attic combined + Garage combined.; 6. 5 + pre-1960 combined.; 7. 5 + pre-1960 combined / post-2020 combined.; 8. 7 + IECC Climate Zone lumped into: 1-2+3A, 3B-3C, 4, 5, 6, 7 except AK, 7AK-8AK.; 9. 7 + IECC Climate Zone lumped into: 1-2-3, 4-8."
 Window Areas,6.0,1.0,sources\rbsa_II\tsv_maker.py,"Window to wall ratios of the front, back, left, and right walls.",2016-17 Residential Building Stock Assessment (RBSA) II microdata.,"The window to wall ratios (WWR) are exponential weibull distributed.; Multi-Family with 2-4 Units distributions are independent of Geometry Stories; Multi-Family with 5+ Units distributions are grouped by 1-3 stories, 4-7 stories, and 8+ stories; High-rise Multi-family buildings (8+ stories) have a 30% window to wall ratio (WWR); SFD, SFA, and Mobile Homes are represented by the SFD window area distribution"
 Windows,11.0,5.0,sources\recs\recs2020\tsv_maker.py,Construction type and efficiency levels of windows.,U.S. EIA 2020 Residential Energy Consumption Survey (RECS) microdata.,"Wood and Vinyl are considered same material; Triple Pane assumed to be 100% low-e; Only breaking out clear and low-e windows for the Double, Non-Metal frame type; Source of low-e distribution is based on engineering judgement, informed by high-levelsales trends observed in Ducker Worldwide studies of the U.S. Market for Windows, Doors and Skylights.; Due to low sample sizes, the following adjustments are made:; [1] Vintage data are grouped into: 1) <1960, 2) 1960-79, 3) 1980-99, 4) 2000s, 5) 2010s.; [2] Building Type data are grouped into: 1) Single-Family Detached, Single-Family Attached, and Mobile homes and 2) Multi-Family 2-4 units and Multi-Family 5+ units.; [3] Climate zones are grouped into: 1) 1A, 2A, 2B; 2) 3A, 3B, 3C, 4B; 3) 4A, 4C; 4) 5A, 5B; 5) 6A, 6B; and 6) 7A, 7B 7AK, 8AK.; [4] Federal Poverty Levels are progressively grouped together until all bins are combined.; [5] Tenure options are progressively grouped together until all bins are combined.; Storm window saturations are based on D&R International, Ltd. 'Residential Windows and Window Coverings: A Detailed View of the Installed Base and User Behavior' 2013. https://www.energy.gov/sites/prod/files/2013/11/f5/residential_windows_coverings.pdf. Cut the % storm windows by factor of 55% because only 55% of storms are installed year round; Due to lack of performance data storm windows with triple-pane are modeled without the storm windows; Due to lack of performance data Double-pane, Low-E, Non-Metal, Air, M-gain, Exterior Clear Storm windows are modeled as Double-pane, Clear, Non-Metal, Air, Exterior Clear Storm windows"