Windows ua lub luag haujlwm loj dua hauv koj lub tsev lub zog ua haujlwm ntau dua li cov neeg feem coob paub. Lawv feem ntau yog qhov tsis muaj zog tshaj plaws nyob rau hauv lub tsev lub hnab ntawv thermal, qhov tsis pom kev ntawm koj qhov chaw nyob sab hauv tsev thiab cov khoom sab nraud.
Thaum peb nyiam pom cov ntawv sau los yog condensation thaum muaj ib yam dab tsi mus tsis ncaj ncees lawm, muaj qhov ua haujlwm ntsiag to ua haujlwm tom qab qhov xwm txheej uas txiav txim siab seb koj lub qhov rais tswj cov cua sov li cas: U-tus nqi. Ib tus lej no cuam tshuam rau koj txoj kev nplij siab, koj cov nqi hluav taws xob txhua hli, thiab txawm tias kev ruaj khov ntawm koj lub tsev nyob rau lub sijhawm.
Txawm hais tias koj tab tom kho dua tshiab, tsim los ntawm kos, lossis tsuas yog yuav khoom rau lub qhov rais hloov, kev nkag siab U-tus nqi tuaj yeem pab koj txiav txim siab ntse dua uas them rau xyoo tom ntej.
U-Value yog dab tsi?
Ntawm nws qhov tseem ceeb, U-tus nqi ntsuas qhov yooj yim cua sov dhau los ntawm cov khoom siv lossis kev sib dhos - qhov no, lub qhov rais. Nws tau nthuav tawm raws li tus lej, feem ntau yog nyob ib ncig ntawm 0.2 txog 1.5 lossis siab dua rau qhov rais.
Txoj cai yooj yim: Qhov qis dua U-tus nqi, qhov zoo dua lub qhov rais yog nyob ntawm qhov chaw uas nws nyob. Lub qhov rais nrog U-tus nqi ntawm 0.8 tso cai rau cov cua sov tsawg dua li qhov ntsuas ntawm 1.4.
Xav txog nws zoo li no: lub thermos nrog cov rwb thaiv tsev tuab ua rau koj kas fes kub ntau teev vim tias cua sov khiav qeeb. Ib khob yas nyias? Koj cov dej haus tau txias sai. Windows ua haujlwm tib yam nkaus - qis dua U-tus nqi txhais tau tias qis dua cua sov, txawm tias koj tab tom sim ua kom sov sov hauv lub caij ntuj no lossis sab nraum lub caij ntuj sov.
Nws tsim nyog sau cia tias U-tus nqi tsis yog hais txog iav xwb. Tag nrho lub qhov rais - ncej, glazing, spacers, thiab seals - pab txhawb rau tag nrho cov kev ntsuam xyuas. Tias yog vim li cas ob lub qhov rais nrog tib lub iav tuaj yeem muaj qhov sib txawv U-tus nqi nyob ntawm seb lawv ua li cas.
Lower vs Higher U-Tus nqi
Thaum koj sib piv qhov rais, koj yuav pom tias qee qhov muaj U-tus nqi qis dua thiab qee qhov muaj qhov siab dua. Tsawg U-tus nqi txhais tau hais tias lub qhov rais zoo dua ntawm kev txwv tsis pub cua sov los ntawm kev txav mus los. Qhov no pab koj ua kom koj lub tsev xis nyob thiab txuag koj cov nyiaj ntawm cov nqi hluav taws xob. Windows nrog qis U-tus nqi ua haujlwm zoo nyob rau hauv huab cua txias thiab kub. Lawv tiv thaiv kom tsis txhob muaj cua sov thaum lub caij ntuj no thiab thaiv qhov kub nce thaum lub caij ntuj sov. Yog tias koj xaiv qhov rais nrog U-tus nqi siab dua, cov cua sov ntau yuav dhau mus, uas tuaj yeem ua rau koj cov chav zoo li qub lossis sov dhau.
Nov yog ib lub rooj yooj yim los pab koj nkag siab qhov txawv:
U-Value Range | Rwb thaiv tsev Performance | Piv txwv Qhov rai Hom |
0.20-0.40 Nws | Kev rwb thaiv tsev zoo heev | Triple-glazed windows |
0.40-0.60 Nws | Kev rwb thaiv tsev zoo | Ob chav glazed qhov rais |
0.60-1.20 Nws | Basic rwb thaiv tsev | Ib-pane windows |
Tsawg U-tus nqi txhais tau tias tsis muaj cua sov tawm, uas yog qhov tseem ceeb rau kev siv hluav taws xob. Koj yuav pom cov txiaj ntsig hauv koj qhov kev nplij siab thiab koj cov nuj nqis txhua hli.
Vim li cas U-Values Matter hauv Lub Neej Tiag (Tsis yog ntawm Cov Ntawv Qhia)
Ntau Cov Cuab Yeej Siv Sab Hauv Tsev
Puas tau zaum ze ntawm lub qhov rais hnub txias thiab hnov qhov txias txias, txawm tias cua sov? Qhov ntawd yog radiant kub poob ntawm kev ua haujlwm. Qhov rais uas tsis zoo U-tus nqi tso cai rau koj lub cev cua sov kom tawg mus rau lub iav txias, ua rau qhov chaw nyob ze lawv tsis xis nyob.
Zoo dua U-tus nqi txo qhov cuam tshuam no. Cov chav nyob sib npaug sib npaug, cov ntawv txias txias ploj zuj zus, thiab koj tuaj yeem siv qhov kev nyeem ntawv zoo nkauj ntawm lub qhov rais txhua xyoo. Nyob rau lub caij ntuj sov, tib txoj cai siv-qhov rais uas muaj kev ua haujlwm zoo thermal pab ua kom cov chaw sab hauv txias dua yam tsis ua rau koj cov cua txias ntau dhau.
Txo cov nqi cua sov thiab cua txias
Cov nqi hluav taws xob sib sau ua ke ib hlis tom qab lub hli, thiab qhov rais feem ntau yog lub luag haujlwm rau 25-30% ntawm thaj chaw cua sov thiab cua txias siv. Qhov rais uas muaj U-tus nqi siab ua zoo li thermal sieves, cia txias cua khiav thiab yuam koj HVAC system ua hauj lwm nyuaj.
Kev kho kom zoo dua rau qhov rais nrog U-tus nqi zoo dua tsis yog hais txog tus nqi them ua ntej - nws yog kev nqis peev uas txo cov nqi khiav lag luam hauv lub neej ntawm lub tsev. Hauv ntau qhov kev nyab xeeb, kev txuag hluav taws xob tuaj yeem ntxiv rau qhov muaj txiaj ntsig hauv ob peb xyoos xwb.
Kev ua tau zoo sib xws thoob plaws Lub Tsev Tag Nrho
Hauv cov tsev loj lossis cov tsev lag luam, ib lub qhov rais ua haujlwm tsis zoo tuaj yeem tsim kev tsis xis nyob hauv cheeb tsam thiab muab pov tseg ntawm koj cov cua sov thiab cua txias. Yog tias lub qhov rais nyob hauv chav ua haujlwm tau zoo tab sis lub qhov rais chav pw tsis yog, koj yuav pom qhov kub tsis sib xws thiab muaj peev xwm siv hluav taws xob ntau dua.
Kev qhia txog U-tus nqi sib xws thoob plaws txhua lub qhov rais pab tswj cov xwm txheej sab hauv tsev thoob plaws hauv lub tsev - ib yam uas tseem ceeb tshwj xeeb tshaj yog rau cov kws tsim vaj tsev, cov neeg tsim khoom, thiab cov thawj tswj vaj tsev saib xyuas ntau lub tsev lossis cov phiaj xwm loj.
Piv txwv li thaum U-Tus nqi tseem ceeb tshaj plaws
Cov huab cua txias thiab sib xyaw
Koj hnov qhov cuam tshuam ntawm U-tus nqi feem ntau hauv cov huab cua txias thiab sib xyaw. Hauv cov cheeb tsam no, qhov rais uas muaj U-tus nqi qis pab ua kom sov hauv koj lub tsev. Qhov no txhais tau tias koj nyob sov dua thaum lub caij ntuj no thiab siv tsawg zog rau cua sov. Cov lej hauv tsev nyob hauv cov cheeb tsam txias dua feem ntau xav tau qhov rais nrog U-factors ntawm 0.30 lossis qis dua. Koj tuaj yeem pom tias cov kev cai no hloov pauv li cas ntawm thaj chaw huab cua hauv cov lus hauv qab no:
Kev nyab xeeb cheeb tsam | U-Factor Requirement |
0 | Tsis xav tau |
1 | Tsis xav tau |
2 | 0.40 los yog qis dua |
3 | 0.30 los yog qis dua |
4 | 0.30 los yog qis dua |
5 | 0.30 los yog qis dua |
6 | 0.30 los yog qis dua |
7 | 0.30 los yog qis dua |
8 | 0.30 los yog qis dua |
Yog tias koj nyob hauv ib qho kev nyab xeeb sib xyaw, koj kuj tau txais txiaj ntsig los ntawm qhov rais uas muaj U-tus nqi qis. Cov qhov rais no pab sib npaug qhov kub hauv tsev thaum lub caij kub thiab txias.
Kub thiab tshav ntuj thaj tsam
Hauv thaj chaw kub thiab tshav ntuj, koj xav kom huab cua txias sab hauv thiab thaiv cov cua sov los ntawm lub hnub. Qhov rais uas tsis muaj U-tus nqi muab kev rwb thaiv tsev zoo dua, uas pab koj lub tsev nyob txias dua. Qhov no txo qis qhov xav tau cua txias thiab txo koj cov nqi hluav taws xob. Koj yuav tsum tau saib rau qhov rais uas tsis tshua muaj hnub ci Heat Gain Coefficient (SHGC), qhov zoo tshaj 0.25. Qhov kev sib xyaw ua ke no thaiv cov cua sov uas tsis xav tau thiab ua rau koj qhov chaw xis nyob, txawm tias nyob rau hnub kub tshaj plaws.
Cov Lus Qhia Pab: Xaiv qhov rais nrog ob qho U-tus nqi qis thiab qis SHGC tuaj yeem ua qhov sib txawv loj hauv koj qhov kev nplij siab thiab kev txuag hluav taws xob.
Qhov rai loj
Yog tias koj lub tsev muaj qhov rais loj lossis iav phab ntsa, U-tus nqi tseem ceeb dua. Cov qhov rais loj cia nyob rau hauv ntau lub teeb ntuj, tab sis lawv kuj tso cai rau ntau cua sov kom txav mus rau hauv thiab tawm. Nov yog yam koj yuav tsum paub:
Cov qhov rais loj nce cua sov pauv nrog rau sab nraum zoov.
Koj tau txais ntau hnub ci, uas tuaj yeem txo cov nqi teeb pom kev zoo.
Koj tuaj yeem pom cov nqi cua sov siab dua hauv lub caij ntuj no thiab cov nqi cua txias dua thaum lub caij ntuj sov.
Ua tib zoo tsim thiab xaiv lub qhov rais zoo pab koj txaus siab rau qhov pom yam tsis muaj zog.
Thaum koj xyuam xim rau U-tus nqi, koj paub tseeb tias koj lub qhov rais loj ntxiv kev zoo nkauj thiab lub teeb tsis ua rau muaj nqi zog.
Yuav ua li cas U-Nqis ua hauj lwm nrog lwm yam qhov rais nta
Thaum koj yuav khoom lub zog txuag qhov rais , koj yuav pom ntau tus lej ntawm daim ntawv lo. U-tus nqi yog qhov tseem ceeb, tab sis nws tsis yog tib qhov kev ntsuas koj yuav tsum paub. Ob lub ntsiab lus tseem ceeb yog SHGC thiab R-tus nqi. Txhua tus qhia koj qee yam txawv ntawm qhov rais ua haujlwm li cas.
U-Values vs SHGC
U-tus nqi ntsuas qhov zoo li cas lub qhov rais ua kom sov tsis dhau mus. SHGC, los yog Solar Heat Gain Coefficient, qhia tias hnub ci cua sov los ntawm lub khob ntau npaum li cas. Koj yuav tsum tau saib ob tus lej los xaiv lub qhov rais zoo tshaj plaws rau koj qhov kev nyab xeeb.
Nov yog ib lub rooj yooj yim los pab koj sib piv:
Metric | Kev piav qhia | Kev cuam tshuam rau lub zog Efficiency |
U-Tus nqi | Ntsuas seb lub qhov rais insulates zoo npaum li cas thiab tiv thaiv kom tsis txhob muaj cua sov. | Tsawg U-tus nqi txhais tau hais tias kev rwb thaiv tsev zoo dua thiab qis dua cov nqi cua sov thiab cua txias. |
SHGC | Ntsuas ntau npaum li cas hnub ci cua sov nkag los ntawm lub qhov rais. | SHGC qis dua ua kom cov tsev txias dua hauv cov huab cua kub. SHGC siab dua pab cov tsev sov hauv cov huab cua txias. |
Tswv yim: Hauv cov huab cua txias, koj tuaj yeem xav tau lub qhov rais nrog tus nqi qis U thiab siab dua SHGC. Hauv cov huab cua kub, nrhiav ob qho tib si U-tus nqi qis thiab qis SHGC.
U-Values vs R-Value
Koj kuj yuav pom R-tus nqi thaum koj sib piv cov khoom rwb thaiv tsev. R-tus nqi thiab U-tus nqi txuas nrog, tab sis lawv tsis zoo ib yam. R-tus nqi qhia koj tias cov khoom siv tiv thaiv cov cua sov zoo npaum li cas. U-tus nqi qhia tau tias cua sov txav mus sai npaum li cas. Nov yog ob peb yam tseem ceeb uas yuav tsum paub txog kev sib raug zoo ntawm ob leeg:
U-tus nqi yog qhov sib txuam ntawm R-tus nqi.
Txhawm rau nrhiav U-tus nqi: U = 1 / R.
Txhawm rau nrhiav R-tus nqi: R = 1 / U.
Nov yog ib daim ntawv qhia ceev:
U-tus nqi | R-tus nqi |
0.2 | 5 |
0.1 | 10 |
0.5 | 2 |
Thaum koj saib ob qho R-tus nqi thiab U-tus nqi, koj tau txais daim duab tag nrho ntawm koj lub qhov rais thiab phab ntsa kom koj lub tsev nyob zoo li cas. R-tus nqi yog ntau rau cov phab ntsa thiab lub ru tsev. U-tus nqi yog tus qauv rau qhov rais thiab qhov rooj. Ua ke, cov lej no pab koj xaiv cov khoom zoo tshaj plaws rau kev txuag hluav taws xob thiab kev nplij siab.
Nco ntsoov, tsis muaj ib tus lej qhia tag nrho zaj dab neeg. Nco ntsoov xyuas U-tus nqi, SHGC, thiab R-tus nqi kom ua qhov kev xaiv ntse tshaj plaws rau koj lub tsev.
Koj tuaj yeem ua rau koj lub tsev yooj yim dua thiab txuag nyiaj los ntawm kev xaiv qhov rais nrog U-Values. Cov lej no qhia tau hais tias koj lub qhov rais zoo li cas kom tsis txhob poob cua sov thiab pab txo koj cov nqi hluav taws xob. Siv cov lus hauv qab no kom nco ntsoov qhov tseem ceeb tshaj plaws:
Ntsiab lus | Kev piav qhia |
U-Factor | Ntsuas lub qhov rais lub peev xwm los tiv thaiv qhov kub poob |
Tsawg U-Factor | Txhais tau hais tias zoo dua rwb thaiv tsev thiab txo nqi zog |
Kev nyab xeeb tseem ceeb | Qhov tseem ceeb rau txhua qhov kev nyab xeeb, tshwj xeeb tshaj yog thaj chaw txias |
ENERGY STAR® | Pab nrog kev txhim kho kev ua haujlwm hauv tsev |
Cov kev coj ua zoo tshaj plaws | Ua ke nrog cov iav qis-E thiab cov pa roj |
Thaum koj mus yuav lub qhov rais, xyuas U-Values kom tau txais kev nplij siab zoo tshaj plaws thiab txuag nyiaj.
Dab tsi yog 'Zoo' U-Value Zoo li
Tsis muaj ib qho U-tus nqi uas zoo meej rau txhua qhov project. Dab tsi suav tias 'zoo' nyob ntawm koj qhov kev nyab xeeb, hom tsev, thiab lub zog hauv zos.
General U-Value Ranges
Qhov rai qhov chaw nyob: U-tus nqi feem ntau yog li ntawm 0.25 txog 1.2. Hauv cov huab cua txias, tsom rau 0.30 lossis qis dua yog ib txwm muaj rau cov tsev ua haujlwm siab.
Cov qhov rais lag luam: Cov kev xav tau sib txawv raws li cov cai hauv tsev thiab cov hom phiaj ntawm qhov project, tab sis U-tus nqi ntawm 0.40 txog 0.60 feem ntau yog tsom rau kev sib koom ua ke thermal.
Cov cai hauv zos feem ntau tau teeb tsa yam tsawg kawg nkaus, tab sis cov uas sawv cev rau hauv pem teb - tsis yog qhov zoo tshaj plaws. Yog tias koj tab tom tsim lossis kho dua tshiab rau kev nplij siab thiab kev ua haujlwm ntev, xav txog U-tus nqi uas tshaj li cov lej qis feem ntau tsim nyog.
Kev nyab xeeb cheeb tsam, qhov rais orientation, thiab kev siv lub tsev tag nrho qhov tseem ceeb rau hauv qhov zoo tagnrho specification.
Vim li cas U-Values Matter Thaum Yuav Windows Online lossis ntawm Scale
Kev yuav khoom rau lub qhov rais tuaj yeem ua rau tsis meej pem sai. Cov ntsiab lus kev lag luam xws li 'zog-efficient' thiab 'kev ua tau zoo' yog siv liberally, tab sis lawv tsis yog ib txwm txhais tau tias tib yam.
U-tus nqi muab txoj hauv kev los sib piv cov khoom. Thaum ob lub tuam txhab thov lawv lub qhov rais yog 'zog npaum' U-tus nqi qhia rau koj tias qhov twg ua tau zoo dua nyob rau hauv cov qauv kev sim.
Yuav Sib piv cov khoom ncaj ncees li cas
Saib rau NFRC (National Fenestration Rating Council) cov ntawv sau hauv Asmeskas, lossis cov ntawv pov thawj sib npaug hauv lwm cheeb tsam
Sib piv U-tus nqi rau lub qhov rais ua tiav, tsis yog qhov ntsuas qhov nruab nrab ntawm-iav
Xyuas kom tseeb tias koj tab tom sib piv qhov zoo sib xws qhov ntau thiab tsawg thiab teeb tsa
Nug cov ntawv xeem yog tias U-tus nqi tsis tau hais meej meej
Zam kev tsis lees paub
Qee cov tuam txhab lag luam hais txog qhov ua tau zoo-suab nrov yam tsis tau muab cov ntaub ntawv ua tau zoo. Cov kab lus zoo li 'thermal thev naus laus zis' lossis 'insulated iav' suab zoo tab sis txhais tau tias me me yam tsis muaj tus lej rov qab.
Cov tuam txhab lag luam ntseeg tau muab kev sim, ntawv pov thawj U-tus nqi rau lawv cov khoom. Yog tias ib lub tuam txhab tsis tuaj yeem muab cov ntaub ntawv qhia meej meej rau koj, qhov ntawd yog tus chij liab tsim nyog xav txog.
Yuav Siv U-Values li cas los txiav txim siab lub qhov rais ntse
Ob peb nqe lus nug tseem ceeb los nug cov neeg muab khoom lossis cov neeg tsim khoom
Dab tsi yog tag nrho-qhov rais U-tus nqi rau cov khoom no (tsis yog qhov nruab nrab ntawm-iav)?
Puas yog tus nqi U-tus nqi ntawm nws tus kheej raug kuaj thiab lees paub?
Cov ncej thiab glazing xaiv dab tsi tuaj yeem txhim kho U-tus nqi yog tias xav tau?
U-tus nqi sib txawv li cas ntawm qhov sib txawv qhov ntau thiab tsawg hauv koj kab?
Thaum twg los ua qhov tseem ceeb U-Tus nqi tshaj lwm yam nta
U-tus nqi yuav tsum yog thawj qhov kev txiav txim siab thaum:
Koj tab tom tsev lossis kho dua tshiab hauv huab cua txias lossis sib xyaw
Windows sawv cev ib feem loj ntawm koj cheeb tsam phab ntsa
Cov nqi hluav taws xob mus sij hawm ntev yog qhov tseem ceeb
Kev nplij siab nyob ze qhov rais yog qhov tseem ceeb (chaw pw, chaw nyob, chaw ua haujlwm)
Uas tau hais tias, U-tus nqi yog ib qho ntawm ntau yam. Sib npaug thermal kev ua tau zoo nrog kev zoo nkauj, kev ua haujlwm, kev ua haujlwm ntev, thiab kev siv nyiaj txiag yog ib feem ntawm kev xaiv txoj cai rau koj qhov xwm txheej tshwj xeeb.
Ntsuas kev ua tau zoo, zoo nkauj, thiab nyiaj txiag
Lub qhov rais zoo tshaj plaws rau koj qhov project tsis tas yuav yog tus nqi qis tshaj U-tus nqi - nws yog ib qho uas ua tau raws li koj qhov kev xav tau ntawm kev ua haujlwm thaum tseem haum rau koj lub zeem muag tsim thiab kev txwv nyiaj txiag.
Ua haujlwm nrog cov tuam txhab tsim khoom uas muaj ntau yam kev xaiv thiab tuaj yeem coj koj mus rau qhov kev tshuav nyiaj li cas feem ntau muaj txiaj ntsig ntau dua li tsuas yog caum tus lej qis tshaj plaws.
Kev xav zaum kawg: Vim li cas U-Nqis Tsim Nyog Tau Txais Koj Cov Lus Qhia
U-tus nqi tsis yog glamorous, tab sis lawv yog ib qho ntawm cov kev ntseeg siab tshaj plaws ntawm qhov rais yuav ua li cas hauv koj lub tsev. Lawv txiav los ntawm kev lag luam lus thiab muab koj lub hauv paus rau kev sib piv.
Ntawm Derchi Qhov Rooj , peb nkag siab tias txhua qhov kev txiav txim siab qhov rais suav nrog kev sib npaug ntawm kev ua tau zoo, kev zoo nkauj, thiab kev xav txog tswv yim. Peb pab neeg tau npaj txhij los pab koj tshawb xyuas cov ntsiab lus kev kawm - suav nrog U-tus nqi - yog li koj tuaj yeem nrhiav qhov rais uas haum rau koj qhov project. Txawm hais tias koj tab tom ua haujlwm ntawm ib lub tsev lossis ntau lub tsev tsim kho, peb nyob ntawm no los muab cov kws tshaj lij thiab cov khoom zoo uas ua rau muaj qhov sib txawv.
