CommissioningofHomesfor2018
EnergyDesignConference
ByMikeD.Wilson
DakotaSupplyGroup
InaccordancewiththeDepartmentofLaborandIndustry’sstatute326.0981,Subd.11,
“ThiseducationalofferingisrecognizedbytheMinnesotaDepartmentofLaborandIndustryassatisfying1.5 hours ofcredittoward BuildingOfficialsandResidentialContractorscode/1hourenergycontinuingeducationrequirements.”
Foradditionalcontinuingeducationapprovals,pleaseseeyourcredittrackingcard.
agenda
• Whatiscommissioning• Isitneeded• Whowoulddothis• Callback• Wants,needs,expectation• Designhouselayout• Performancetestingandverification• Codesbeingfollowed• Benefits• Systems• Shell• Mechanicalhvac
Commissioning- whatisit
• Itisdoneoncommercialbuildingallthetime• Itismorethenperformingablowerdoortest• Itismorethenfinishingthepunchlist• Itfollowsthehouseasasystemthought• Thereislevelsofcommissioning…dependsCommissioningprocessshouldlooklikeØTestandverifyindividualcomponentsfunctionalityØDothosecomponentsworkintheredesignedsystemsØDoesallcomponentsandsystemsinteractproperlyandperformtoexpectation
Wantsandexpectation
• Whatdoesthehomeownerwant• Lowenergy• IAQ• Certainlookorshelldesign…passivesolar• Componentsofthehouse• Expectations• Temp- RH%• Costofenergy• Maintenance• Other
Benefits
• Pieceofmind• Warranties• Comfort• Lesshasslesafterclosing• Lesscallbacks
Commissioning- whodoesit
•Couldbesingleperson•Asmallteam• ServicesfromaArchitectgroup• ServicesfromaEngineergroup• ServicesfromaEnergyprofessional• ServicesfromaHVACprofessional
DESIGN
• Builder• Architect• Engineer• Subcontractors• Internet• Homeowner
Comeupwithaplan,mapitout• Theprocessshouldstartduringdesignandblueprintstage
• Whatistheguidelinesoftheprocess
• Getthehomeownerinvolved
• Subcontractorsshouldbeinvolved
• Allpartywillknowbeforeroughinwhatistobetestedandverified
Meetingwithallparties,explainwhattestingistobedone
FLASHINGANDWINDOWLOCATION
HOTTUBMPLS
WATERANDWINDOWS?
FOURSEASONAREA…WHATDOYOUSEE
Commissioning- whyisitneeded
• Anoverallprocessthatlooksathowtheshellanditcomponentsworktogether….AlotofhomesarebuiltwiththethoughtthatwhenMYpartisdone,Iamdone• Codesdonotcoverperformanceandmaintenance• Ingeneralbuildersdoagreatjobongoingoverthehouseandoperation,butdotheyhaveallthetoolsandskillstoverifyoperation
Giveexamples
• Callbackissues…costly• Thisisjustafewexamples
AIRFLOWLEAKAGE(speakersandlights)andDUCTPENETRATIONFROMATTIC
EXHAUSTHOODSUCKINGAIRIN
19
FailureSummaryWOODFLOORING
1.Uncontrolledjobsitemoisture2.WrongParametersbyHVAC3.UncontrolledRhbyhomeowner4.RadiantHeatControls5.WrongProductChoice
Largefloortoceilingdrapesactasinsulation,coolingglasssurfaces
Youcan’tmakethisstuffup?!
Ductworkneedstobecoveredwithinsulation
MoistureFailureatduct/hood
Coldairthrubathfan,damperopen
Canlight
Wallcavitypoorinsulationdetail
Thistypeofshadealsocoolswindowsurface,coolersurfacemorewindowcondensation
HRV/ERVAIREXCHANGERwithnodampersinsystem
SUPPLY- RETURNDUCTDESIGN,NODAMPERS
OA
OAH ERVHRV
EA
EAH
• SEASONSUMMER• CALLFORCOOLINGORFANON• ERVORHRVISOFF• ACTUALMEASUREDFLOWS6INCHDUCT
1. OUTSIDEAIRTOHOUSEDUCT,ISNOWREVERSEINFLOWANDISBLOWING110CFMOF50DEGREETOTHEOUTSIDE
2. EXHAUSTAIRTOOUTSIDEDUCTISALSOINREVERSEFLOWITISSUCKINGIN65CFMOF85DEGREE58DEGREEDEWPOINTFROMOUTSIDE
APPLYTHISTOWINTEROPERATION#?!
Backflowdemonstration
Twosixinchflexductsformakeupair,constantflowofcoldair
CondensationintheBuildingAssemblies
• Canleadtomoldandrot• Cancausebuildingfailuresin,siding,rimjoists,walls,frostandmoistureinattic• Canleadtolitigationandsomevery$expensesrepairs• ThehighertheRH%isinthewinterthemorethestructurehasapotentialforproblems• ProperRH%andairsealing/insulatingcansolvetheseproblems• FollowSystemsApproach
Codes
• Arecodesbeingfollowed?• Inareasthatthereisnoenforcement,dowhatever?• Inareasthathaveinspection,thisdoesnotensureoperationandperformance• Codesandstandardsarenotperfect…butalotoftimeandthoughtgoesintothecodemakingprocess• Buildingtocodeisabaseline,talktohomeowneronhowtoachieveperformanceabovethecodeline
HousedesignandHVAC
• DoesthelayoutofthehousemakesensewiththeHVACdesign?• IstheHVACbidpriceorperformancedriven?• Expectationsofthehomeowner?• InputfromtheSubContractors• Trackrecord(provenhistory)withequipment,installations,suppliers,servicetech,techsupport,manufacturesandwarranties
ALOTOFGLASSFACINGWEST
HVAC
• Followmanufacturinginstallspecification….Readthemanual• Industrystandards• Startupforms• Registration• CertificationandTraining• Meetcodestandards
Doeseverbodyunderstandhowthecontrolwork
Systemapproachedoninterfaceandoperation• Doessystemworktogetherunderdifferentconditions• Doeshomeownerunderstandhowcontrolswork• Operationandperformance• Maintenanceplan
Walkthruwithhomeowner
Testingandverification
Blowerdoortest
BALANCED - HRV/ERV
Balancing air flows needed for proper performance
LabtestatMCTCDuctblaster
Toolsyouneed
• Equipmentthatiscalibratedtodoductleakagetesting
• Formulaorsoftwaretodothecalculations
• EquipmentthatIuse• DuctBlaster,TheEnergy
ConservatoryØ DG-700digitalmanometerØ DuctBlasterfanwithringsØ Instructionsandsoftware
• Ductmastic• Ductmaskorplugs• Lights(troubleandflash)• Smoke(foggerorhandheld)
Verifyexhaustandsupplyflow
Delivery temp runs about 10 degrees colder then a conventional AC system it will dehumidify the house air more
TESTACUNIT
DEEPVACUMONAC/HEATPUMP
SURFACETEMPS
Supplyairtemperatureona0degreesFday
BUILDINGPRESSURE
DEPRESSURIZATIONTESTING
• WALKTHROUGH1. DETERMINEWATERHEATER,SPACEHEATINGEQUIPMENTANDANYWOOD
BURNINGEQUIPMENT
• THREELARGESTFANS,THISISPARTOFTHETEST• READTHEPROTOCOLTABLES• PREPHOUSEANDDOTEST• RECORD• RETURNHOUSETOORIGINALSETTINGS
Pooltohousepressure
hDepressurization graph
57
HOBO U12 Tells You When Someone is Tweaking with the Thermostat
Residentialairbalancing
• Thisisafewideasonhowtomakesomequickadjustments• Thisservicecouldbeaquickwalkthruobservationtoaseveralhoursandductworkbeingchanged
ResidentialAirBalancing
A. Interviewthehomeowner1. Whatistheissue,comfort,Condensation,IAQ,seasonal,temp
B. Whatkindofductsystem(whereistheductwork)C. WhattypeofblowermotorD. Howdotheyruntheblower(AUTOorON)E. CanyougetattrunkandbranchdampersF. MeasurefloworpressurebeforeandafteradjustmentG. Documentwhatyoudidandtellsomeone
FLOWMEASUREMENT
Trunkandrunoutdampers
.19
.27
.73
.4
EXTERNALSTATICPRESSUREANDPRESSUREDROP
Thankyouforyourtime
• MikeD.Wilson,presenter• DakotaSupplyGroup• 612-597-3395• [email protected]
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