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

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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

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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

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.27

.73

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EXTERNALSTATICPRESSUREANDPRESSUREDROP

Thankyouforyourtime

• MikeD.Wilson,presenter• DakotaSupplyGroup• 612-597-3395• mwilson@dsginc.biz