Final presentation to ackbuilders 11 08 12

Re-­‐Framing  the  House:  An  Energy  Perspec9ve  

Presented  by  Tom  Barnes,  Principal  

Nantucket  Building  Science  

Email:  [email protected]  Tom  cell:  (508)  631-­‐6633  

The  Long  Explana9on…  Wikipedia  says  Building  Science  is….  

•  Building  science  is  the  collec/on  of  scien/fic  knowledge  that  focuses  on  the  analysis  and  control  of  the  physical  phenomena  affec/ng  buildings.  It  tradi/onally  includes  the  detailed  analysis  of  building  materials  and  building  envelope  systems.    

•  The  prac/cal  purpose  of  building  science  is  to  provide  predic9ve  capability  to  op9mize  building  performance  and  understand  or  prevent  building  failures.  

•  The  building  science  of  a  project  refers  to  strategies  implemented  in  the  general  and  specific  arrangement  of  building  materials  and  component-­‐assemblies.  

•  This  is  the  architectural-­‐engineering-­‐construc9on  (AEC)  technology  discipline  that  concerns  itself  with  the  'mainly  detail-­‐design'  of  buildings  in  response  to  naturally  occurring  physical  phenomenon  such  as:  

–  weather  (sun,  wind,  rain,  temperature,  humidity),  and  related  issues  (e.g.  freeze/thaw  cycles,  dew  point/frost  point,  snow  load  &  driX  predic9on,  lightning  paYerns  etc.)  

–  subterranean  condi/ons  including  (poten9al  for  soil  +  ground-­‐water  ac9vity,  frost  penetra9on  etc.).  

–  characteris/cs  of  materials  (e.g.  Galvanic  corrosion  between  dissimilar  metals,  permeability  of  materials  to  water  and  water  vapor,  construct-­‐ability,  compa9bility,  material-­‐adjacency  and  longevity  issues).  

–  characteris/cs  of  physics,  chemistry  and  biology  such  as  capillary-­‐ac9on,  absorp9on,  condensa9on  (“Will  the  dew  point  occur  at  a  good  or  bad  place  within  the  wall?"),  gravity,  thermal  migra9on/transfer  (conduc9vity,  radia9on  and  convec9on),  vapor  pressure  dynamics,  chemical  reac9ons  (incl.  combus9on  process),  adhesion/cohesion,  fric9on,  duc9lity,  elas9city,  and  also  the  physiology  of  fungus/mold.  

–  human  physiology  (comfort,  sensory  reac9on,  radiance  percep9on,  sweat  func9on,  chemical  sensi9vity  etc.)  

–  energy  consump/on,  environmental  control-­‐ability,  building  maintenance  considera/ons,  longevity/sustainability,  and  occupant  (physical)  comfort/health.  

Energy,  Building  Science,  Perspec9ve  (Opera9onal  Defini9ons,  etc)  

Short  Explana9on:  Building  Science  =    

– the  detailed  analysis  of  building  materials  and  building  envelope  systems  

– that  offers  a  predic/ve  capability  to  op/mize  building  performance    

– and  understand  or  prevent  building  failures          We  are  talking  mostly  about:  •  Energy  =measurable  quan9ty  of  heat,  work,  or  light  •  The  common  denominator  for  this  is:  BTU  (Bri9sh  Thermal  Unit  -­‐  common  conversion  unit)  –  energy  to  raise  one  pound  of  water  by  1  degree  F.  

Ack  fuels  -­‐  BTU  Equivalents:    •     LP  gas  –  92,000  BTUs  per  gallon  •     #2  Fuel  Oil  –  139,000  BTUs  per  gallon  •     Electricity  –  3,412  BTUs  per  1000  waSs  (kW)  

Sample  House:  •     Typical  Exis9ng  Ack  house  –  3,000  SF  =  110,000,000  BTU  per  year  •     40  years/20%  improvement  =  880,000,00  BTUs  –  a  builder/designers  poten9al  long  term  impact!  Equals  8  years  of  energy.  

On  Nantucket,  our  fuel  choices  have  embedded  amounts  of  BTUs  in  them….  

Habitat  Home  (LEED  Silver):  •     Scored  a  51  on  HERS  score;  super  9ght  construc9on  (ICF),  solar  thermal  system  •     Expected  Annual  BTUs  consump9on  =  22,000,000!  80%  beYer.  

What  are  Frameworks?    They  include  government  prescribed  (codes),  voluntary  programs,  and  best  

prac/ces  (norms,  standards)        

•  Building  codes  •  Energy  codes  (IECC  2009,  2012)  •  Leading  edge  ini/a/ves  (MA  Green  Communi9es)  

•  U/lity  Programs  (MassSave)  

•  Voluntary  Programs  (LEED,  Energy  Star  for  Homes  –  aka  E*Homes)  

•  Best  prac/ces  (Ack)  

Frameworks  

“Drivers”  of  These  Frameworks  •  The  Building  Science  informs  the  codes;  health  and  safety  concerns  drive  the  codes  

•  Codes  drive  the  majority  of  choices  and  behaviors:  design,  construc9on  

•  Government  ini9a9ves  drive  changes  too:  Green  Communi9es  Act,  Stretch  Code  (MA),  EPA  E*  

•  U9lity  regulatory  frameworks  drive  programs  –  MassSave  –  DSM  (reduce  peak  loads)  

•  Voluntary  programs  drive  some  behaviors  –  LEED,  MA  New  Homes  w/  E*  

The  “Energy”Frameworks  -­‐  MA  •  Building  Code,  Energy  Code  (IECC  2009,  2012)  

– Primary  tools:  ResCheck  (GIGO),  insula9on  inspec9ons,  HVAC  “duct  blaster”  tes9ng,  reliance  on  subcontractors  

•  “Stretch  Energy  Code”  Communi9es  – Primary  tools:    TBC  –  Thermal  Bypass  Checklist  (prescrip9ve),  HERS  ra9ngs/inspectors,  Blower  Door  Tes9ng,  Duct  Tes9ng,  Manual  J  (load)  calcula9ons  

•  Voluntary  programs:    MA  New  Homes  w/  E*,  LEED  for  Homes  

•  ASHRAE  62.2  (ven9la9on)  

Illustrates  How  Many  Communi9es  Have  Adopted  The  Stretch  Code  Framework  

More Than 122 Communities Have Voluntarily Adopted “Stretch Code in Mass (so far!). And

There are Financial Incentives •  Almost the same as the Stretch Code  

–  Approx 30% in 2010 of new homes in MA

•  Builder incentives/rebates –  $750 - $8000 for SFD –  $350 - $4,000 for MF

•  Additional –  Appliances – up to $100 –  Heating – up to $1,500 –  Cooling – up to $500 –  Lighting – free

The  New  Energy  Code  is  Coming!  2012  IECC  (July  1,  2013)  -­‐  Highlights  

•  Ceiling  R-­‐Values  –  R-­‐49  from  R-­‐38!    However,  an  alterna9ve  “overall  assembly  U-­‐value”  calc  of  0.026  (R  of  38.46)  can  be  submiYed  as  an  alterna9ve.    Also  an  overall  “building”  UA  alterna9ve  can  also  allow  one  to  design  around  this  R-­‐49  –  HERS  modeling  and  Manual  J  can  do  these  calcula9ons  for  inspectors.    There  may  be  other  “work-­‐arounds”  for  this.    

•  Mandatory  “Cer9ficate”  near  electric  panel  –  info  on  insula9on,  doors,  windows,  duct  system  leakage  test  results,  blower  door  test  results,  hea9ng/cooling/DHW  efficiencies  =  essen9ally  an  Owner’s  Manual  (a  best  prac9ce?)  

2012  IECC  (July  1,  2013)  Further  Highlights  

•  Floor  insula9on  shall  be  installed  to  maintain  permanent  contact  with  underside  of  subfloor  decking.  

•  Sealing  of  breaks  in  the  air  barriers  –  more  and  9ghter  sealing  of  cracks,  gaps,  and  pathways  for  air.  

•  R402.4  Air  Leakage  (Mandatory)  –  BD  tests  required  –  no  more  than  3  ACH50!    Tes9ng  done  aXer  all  penetra9ons  to  thermal  envelope  (recommend  pre-­‐drywall!)      

•  R403.2.2  (Duct)  Sealing  (Mandatory),  Tes9ng  –  Post-­‐construc9on  –  max  4%  of  CFA  leakage.  (4/3  for  rough  in  tes9ng.)    NA  if  ducts,  equipment  inside  envelope.    

2012  IECC  (July  1,  2013)    Even  More  Highlights  

•  R403.6  –  Equipment  Sizing  (Mandatory)  –  Hea9ng  and  Cooling  Equipment  shall  be  sized  per  ACCA  Manual  S  from  loads  calculated  from  Manual  J  (sizing  soXware.)    (HERS  RemRate  soXware  and  Manual  J  do  some  of  the  same  things  as  far  as  load  calcula9ons.)  

•  R404.1  Ligh9ng  Equipment  (Mandatory)  –  75%  high-­‐efficacy  lamps.  

•  R405  –  Simulated  Performance  Alterna9ve  –  (HERS  ra9ng,  RemRate  model)  –  PERFORMANCE  vs.  PRESCRIPTIVE  path)  –  proposed  design  is  shown  to  have  a  lower  energy  than  a  standard  reference  design.    Checklist  for  inspector  required  to  verify  in  field.  

Primary  Tools  in  the  Frameworks/Codes    –  Energy  SoXware  

ResCheck   Manual  J   HERS  (RemRate)  

Inputs   Building  specs   Building  specs   Building  specs  

Outputs   Report  for  submission  for  permit  

Load  calcs  and  2012  IECC  info  needed  for  permit  

HERS  score  and  120  more  pages  of  analysis  

Uses   Code  compliance/  permit  

Load  calcula9ons,  equip  sizing,  code  compliance  

Standardized  scoring  system,  Load  calcula9ons  

Bonus  Uses   ?   Tradeoffs  analysis  –  what  ifs;  UA  path;  Sales  tool  

Tradeoffs  analysis  –  what  ifs;  UA  Path;  Sales  tool    

Piyalls   GIGO;  used  to  pull  a  permit;  builder  or  designer  calcs  it  

GIGO  if  done  for  “free”  by  supply  house,  oversized  

GIGO  if  details  not  accurate  

On  to  the  Building  Science  

Principle  Focus  #1:  Gradients  •  Temperature  –    from  hot  to  cold  (think  conduc9on)  

• Moisture  –  moves  from  wet  to  dry  

•  Pressure  –  from  high  to  low  

•  Don’t  try  to  change  the  laws  of  physics  –  work  to  minimize  the  impacts  of  each  on  a  home  

Note  in  this  diagram  that  water    molecules  are  smaller  than  air  molecules  thus  allowing  them  to    “diffuse”  through  walls  and  founda9ons  and  roofs….  

Going  Against  The  Gradient  Takes  Energy  –  The  Basics  of  Heat  Movement  and  the  

Physics  of  “Phase  Changes”  

Principle  Focus  #2:  Building  Shell  Heat  Flow  •  Goal:    Design  Building  Shells  to  minimize  unwanted  heat  

flow,  moisture  flow,  pressure  differen9als  (control  the  gradients!)  

•  2  mechanisms  (how  heat  moves):  transmission  and  air  leakage  (which  takes  moisture/water  molecules  with  it!)  

•  2  factors  in  transmission  piece:  thermal  resistance  (R)  and  surface  area  (A)  –  more  heat  needed  for  larger  surface  area  

•  Temperature  gradient  (between  inside  and  outside)  drives  transmission  “flow”  –  when  it’s  colder  outside,  heat  loss  increases  as  flow  increases!  

•  Insula9on  resists  conduc9on  (slowest  means  of  heat  flow),  convec9on,  radia9on  through  a  building  component.  IR  camera  can  detect  and  “photograph”  radia9on.  

•  Air  leakage  measured  by  Blower  Door  (see  AckBS  form)  

R  Values  of  Assemblies:    R  means  “resistance”  to  heat  transmission/flow;  higher  R  usually  beYer  

Cavity  insula9on  forces  conduc9on  over  radia9on  and  convec9on  –  conduc9on  being  the  slowest  method  of  transmission  

Note:  R-­‐values  is  “addi9ve”  –  add  more  layers,  increase  R-­‐value)  

From  Raw  Data  to  Results  –  Calcula9ng  “Loads”,  Sizing  Equipment  

•  Raw  data:  site  data  (orienta9on),  surface  area  calcula9ons  (walls,  floors,  ceilings)  

•  R  –  Values  by  component  or  area  (e.g.  R-­‐19  in  walls,  R-­‐30  in  floors,  R-­‐38  ceilings).    Door  and  window  areas  and  characteris9cs.  

•  Air  leakage  from  blower  door  test  •  Load  calcula9on  soXware  (Man  J,  HERS  RemRate)  •  Hea9ng/Cooling  equipment  op9ons  and  efficiencies  

•  Output  –  BTUH  –  amount  of  heat  to  move  mechanically  (refrigera9on  cycle)  

•  Load  –  how  many  BTUs  per  hour  (BTUH)  needed  to  be  added  (hea9ng)  or  removed  (cooling)  to  provide  comfort.  

•  Cooling  load  also  involves  removal  of  moisture  content  (latent  heat)  

Boiler  Ra9ng  Needed  

Loads  Sub-­‐Part  #1:  Insula9on      Insula/on  Type/Descrip/on   R-­‐Value/inch  

Fiberglass  baYs   3.1  (cavi9es)  

Dense  pack  cellulose   3.5  

Low  density  spray  foam  (OC)   3.6  (Icynene)  

High  density  spray  foam  (CC)   6.0  

XPS  (extruded  polystyrene)   5.0  (blue,  pink)  

Polyisocyanurate   6.8  (foil  faced)  

Now,  compare  these  to  code  requirements,  best  prac9ces  for  uses.  

R-­‐49  ceiling/roof  =  8.2  inches  closed  cell  spray  foam,  13.6  inches  with  open  cell  spray  foam  

Fiberglass  baYs  are  not  an  air  barrier!    

Loads  Sub-­‐Part  #2:  Air  Leakage  

•  There  is  no  “perfectly  air  9ght”  home  nor  should  there  be.  

•  There  are  code  driven  standards  –  engineered  standards  –  for  ven9la9on,  which  is  9ed  to  leakage.  

•  Go  below  certain  thresholds  (0.35  ACHn),  add  mechanical  ven9la9on  –  exhaust  only  bath  fans  are  preferred  method,  best  prac9ce  at  this  9me.    ERV  is  another  alterna9ve.  

•  EE  programs  prescribe  air  sealing  limits  (SIR)  

Blower Door Samples - Actuals Actual Formula Actual Formula Results ResultsBlower Door Variable Volume Variable (Calculated) (Converted)Readings 5-7 range = Below 0.35 =(tested) (Calculated) good mech vent req'd

CFM50 60 Volume (CF) n ACH50 ACHn Real Volumes/CFMs

Sample Tested House: "Tight"Habitat Pochick Ave house 8/3/12 ACH50 645 60 11960 NA 3.236 38700 CF/hr @50p

1 story cape, move on, rehab ACHn 645 60 11960 16.7 0.194 2317 CF/hr @nat4186 ASHRAE CF/hr @nat standard

Yes Needs Mechanical Ventilation?Sample Tested House: "Tight"

Hooper Farm Rd ACH50 1333 60 14903 NA 5.367 79980 CF/hr @50p2 story cape, modular ACHn 1333 60 14903 13.3 0.404 6014 CF/hr @nat

5216.05 ASHRAE CF/hr @nat standardNo Needs Mechanical Ventilation?

Sample Tested House: "Leaky"Sunset Hill Lane ACH50 722 60 5250 NA 8.251 43320 CF/hr @50p

1.5 story, garage apartment ACHn 722 60 5250 15 leaky 0.550 2888 CF/hr @nat1837.5 ASHRAE CF/hr @nat standard

No Needs Mechanical Ventilation?Sample Tested House: "Leaky"

Sunset Hill Main House ACH50 3672 60 19000 NA 11.596 220320 CF/hr @50p1 story home ACHn 3672 60 19000 16.7 leaky 0.694 13193 CF/hr @nat

6650 ASHRAE CF/hr @nat standardNo Needs Mechanical Ventilation?

Sunset Hill Main House CFM50 Req'dAir Sealing Opportunities: Standard BD Target: Reduction Percentage Variable CFMn

Get to 0.35 ACHn ASHRAE 1,851 1,821 50% 0.35 110.833 BD reading @ ASHRAE CFM50 Standard5 ACH50 target E* Homes 1,583 2,089 57% 5.00 94.810 BD reading - E* Homes CFM50 Standard

BPI High 1,851 1,821 50% 0.35 110.833 BD reading - BPI CFM50 Standard - "BAS"70% of ASHRAE BPI Low 1,296 2,376 65% 0.70 77.583 BD reading - BPI CFM50 70% of BAS

Using  a  Blower  Door  and  proven  air  sealing  techniques  we  can  air  seal  this  leaky  building  down  to  this  CFM  measurement  and  reduce  air  leakage  by  50%!  

Demys9fying  the  Blower  Door  •  Of  these  4  houses,  one  was  9ght  and  requires  mechanical  ven9la9on  –  it  has  an  ERV  

•  The  second  one  –  on  Hooper  Farm  Rd  –  was  spot  on….5.36  ACH50  (range  of  5-­‐7  is  considered  good)  

•  The  last  one  could  benefit  from  air  sealing  –  11.59  ACH50.    BD  reading  was  3,672  CFM50  –  Op9mal  would  be  to  seal  it  to  reduce  this  to  1,851  CFM50  –  a  50%  reduc9on.  

•  House  volume  is  19,000  CF;  13,193  CF  naturally  turns  over  in  this  house  each  hour  –  70%!    That’s  heat  out  the  door.  

Blower  Door,  Duct  Blaster  (HVAC)    

Duct  Blaster  Principles  

HVAC  Duct  Tes9ng  (sample  handout    provided)  

•  Duct  leakage  can  account  for  a  significant  por9on  of  energy  losses  in  a  home  (25%+)  

•  In  the  current  energy  code  and  being  enforced  on  Ack  –  HVAC  subcontractors  have  to  test  for  leakage  

•  Sample  home  (Hooper  Farm)  –  passed  2009  IECC  limit  of  8%  of  CFA  (post  construc9on  ,leakage  to  outside  test).    (Note:  2012  IECC  calls  for  4%  of  CFA  leakage  –  a  50%  performance  improvement.)    

•  Best  prac9ces  are  to  have  all  equipment  and  ducts  inside  the  thermal  boundary  (not  in  uncondi9oned  basements  or  a{cs)  

This  is  considered  the  best  prac9ce:  Ducts  fully  inside  the  thermal  boundary  leak  to  the  inside  so  do  not  have  to  be  tested  under  2012  IECC  codes  as  heat  lost  from  ducts  is  s9ll  inside  the  “thermal  envelope”  or  the    heated/cooled  area  of  the  building.  

Domes9c  Hot  Water  Ligh9ng  and  Appliances,  Plumbing  

Windows,  Doors,  Openings  •  Domes9c  hot  water  –  use  high  efficiency  systems,  on  

demand  (op9mal  for  seasonal  home?)  •  Ligh9ng  –  CFL’s  maYer,  quality  improving.    Halogens  are  

energy  sinks!    Use  E*  fixtures.  •  Appliances  –  E*  labeled  will  do  it!  •  Plumbing  –  use  WaterSense  labeled  devices  (EPA  

cer9fied)  •  Windows  and  doors  are  your  energy  “weakest  link.”    Use  

E*  windows,  well  insulated  doors,  storm  doors.    Build  ves9bule  at  boYom  of  bulkhead  entries.    Air  seal  properly  around  all  areas.    

Energy  Efficiency,  Conserva9on  

•  Energy  Efficiency  (EE)  –  do  more  with  the  same  energy  

•  Conserva9on  –  use  less  energy,  turn  down  heat  • MassSave  (Cape  Light  Compact  on  MV,  Cape)  –  they  implement  all  EE  programs  for  Ack)  

•  Please  arrange  a  free  home  energy  assessment  form  MassSave  –  or  contact  Nantucket  Building  Science  to  help  you.    Having  an  audit  also  qualifies  you  for  a  0%  interest,  7  year  “Heat  Loan  Program”  for  EE  upgrades,  new  equipment,  etc.)    

Alterna9ve  Energy  Systems  

•  Energy  efficiency  (EE)    is  the  “5th  fuel”  –  improve  structures  first,  reduce  overall  load  

•  We  have  helped  evaluate,  source,  and  install  several  systems  on  island  to  date  

•  Disincen9ves  to  AltE  –  cost,  HDC,  maintenance  •  Financial  incen9ves  to  AltE  –  Federal,  state  •  Market  drivers  ques9onable  on  Ack  •  Order  of  Effec9veness  (AckBS  opinion):  

–  Solar  Thermal  (installed  a  few  of  these,  maintenance  concerns)  

–  Solar  PV  (recent  price  drop,  great  incen9ves)  –  Air  source  heat  pump  (e.g.  Mitsubishi  mini-­‐split)  

–  Ground  source  heat  pump  (geothermal)  

–  Wind  (big  turbines,  not  small  ones)  

Business,  Money,  Incen9ves  

•  There  are  Federal,  State,  U9lity,  and  Other  program  financial  incen9ves  out  there.      

Incen9

ve  sam

ples  

Incen9

ve  sam

ples  

Incen9

ve  sam

ples  

•     Reduce  thermal  bridging  –  advanced  framing  methods  •     All  ducts  within  condi9oned  space  –  plan  in  advance  •     Durability  –  keep  water  out,  control  air  flow,  promote  drying  •     Performance  Tes9ng  –  IECC  2012  –  ducts,  air  leakage  •     Commissioning  –  Mechanical  Equipment  –  ensure  proper  opera9on  •     Basements,  Founda9ons,  and  Slabs  –  see  next  slide  (detailed)  •     Control  Air  Leakage  •     Windows,  doors  –  install  E*,  properly,  air  sealed,  panned  •     SEER  of  15  and  higher  for  AC  •     AFUE  for  furnaces  and  boilers  above  90%  •     Manual  J  for  HVAC  sizing  (loads);  Duct  sizing  per  Manual  D  •     Power  ven9ng  all  combus9on  appliances  •     Indoor  humidity  –  60%  summer;  40%  winter  •     No  plumbing,  ducts  in  exterior  walls  if  possible    •     Owner’s  manual  and  training                    

Best  Prac9ces  for  Ack:  

Best  Prac9ces  -­‐  Basements  

•   Note  points  where  sealants  are  used  •   Note  capillary  ac9on  through  founda9on,  slab  •   Note  slab  poured  on  crushed  stone  –  never  sand;  poly  under  slab  on  top  of  stone  •   GuYers,  downspouts  not  shown  but  are  cri9cal  for  bulk  moisture  removal  •   Moisture  dries  to  inside  –  do  not  use  vapor  barriers  

Air  Barrier  Details  –  Air  barriers  are  cri9cal  and  part  of  the  code.    Typically,  the  taped  drywall  inside  the  house  is  a  primary  air  barrier  –  a  barrier  to  the  uncontrolled,  free  flow  of  air  across  the  thermal  shell/wall/floor/ceiling.    Free  flowing  air  traveling  through  cracks,  leaks,  and  penetra9ons/holes  leads  to  moisture  and  energy  flow,  poten9al  problems  and  higher  energy  bills.    It  is  rela9vely  easy  to  get  these  details  right  –  lots  of  100%  silicone  caulking!  

We’re  Done!    For  now….  

Please  sign  in  and  give  us  your  email  to  get  this  PDF  sent  to  you.  

Call  us  if  you  need  diagnos9c  tes9ng,  help  with  codes,  specs,  diagrams,  best  prac9ces,  problems  with  mold…whatever.  

[email protected]  

Tom  Barnes  cell   508-­‐631-­‐6633  

Bonus  Slides  

Rela9ve  Humidity  Explained  

Psychrometric  Chart  

Follow  the  dry  bulb  temperature  (ver9cal  line)  up  9ll  it  connects  with  the  wet  bulb  temp  (diagonal  line).  The  point  when  they  meet  is  Rela9ve  Humidity  

Reading  the  chart  

Example  1:  Dry  Bulb:  70°F  Wet  Bulb:  60°F  

Rela/ve  Humidity:  60%  *If  wet  bulb  reached  70,  it  would  be  raining.    

The  rela/onship  between  temperature  and  humidity  

Cold  Climate  Design  Data  Note:  Boston  HDD,  CDD  

Ack  –  Design  Hea9ng  Degree  Days  =  5,641;  CDD  =  678  MA  –  HDD  =  6,530;  CDD  =  439    

46 Okorwaw Ave

Nantucket, MA

5 Stars PlusVerified Condition

Rating Number: 48832

Certified Energy Rater: Peter Hubbe

Rating Date: 1/10/2011

Rating Ordered For: Habitat for Humanity Nantucket

Estimated Annual Energy Cost

Verified Condition

Use MMBtu Cost Percent

Heating 21.4 $880 39%

Cooling 0 $0 0%

Hot Water 0.0 $0 0%

Lights/Appliances 26.7 $1227 55%

Photovoltaics -0.0 $-0 -0%

Service Charges $136 6%

Total $2242 100%

This home meets or exceeds the minimum

criteria for all of the following:

TITLE

Company

Address

City, State, Zip

Phone #

Fax #

Uniform Energy Rating System

1 Star 1 Star Plus 2 Stars 2 Stars Plus 3 Stars 3 Stars Plus 4 Stars 4 Stars Plus 5 Stars 5 Stars Plus

500-401 400-301 300-251 250-201 200-151 150-101 100-91 90-86 85-71 70 or Less

Energy Efficient

HERS Index: 51General Information

Conditioned Area: 1824 sq. ft. HouseType: Single-family detached

Conditioned Volume: 18285 cubic ft. Foundation: Conditioned basement

Bedrooms: 3

Mechanical Systems Features

Heating: Fuel-fired hydronic distribution, Propane, 95.1 AFUE.

Water Heating: Integrated, Propane, 0.87 EF, 40.0 Gal.

Duct Leakage to Outside: NA

Ventilation System: Exhaust Only: 80 cfm, 150.0 watts.

Programmable Thermostat: Heating: No Cooling: No

Building Shell Features

Ceiling Flat: R-34 Exposed Floor: NA

Vaulted Ceiling: R-37 Window Type: U:0.33, SHGC:0.30

Above Grade Walls: R-20 Infiltration:

Foundation Walls: R-20.0 Rate: Htg: 1.91 Clg: 1.91 ACH50

Slab: R-0.0 Edge, R-10.0 Under Method: Blower door test

Lights and Appliance Features

Percent Fluorescent Pin-Based: 10.00 Clothes Dryer Fuel: Propane

Percent Fluorescent CFL: 0.00 Range/Oven Fuel: Propane

Refrigerator (kWh/yr): 378.00 Ceiling Fan (cfm/Watt): 0.00

Dishwasher Energy Factor: 0.46

The Home Energy Rating Standard Disclosure for this home is available from the rating provider.

REM/Rate - Residential Energy Analysis and Rating Software v12.93 This information does not constitute any warranty of energy cost or savings.

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