Baxi ECOGEN, Product Manual

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Legislation
16
We have taken a 1960’s 4 bed semi detached property as an example to compare the SAP
benefit of retrofitting a Baxi Ecogen
Floor Area: 101m² over two storeys
Single bathroom
Typical 1960’s fabric values and air leakage rates
SAP example
Calculation 1
=OA@QLKJ=0"!2(=J@$>KEHAN=P0-@AB=QHPKBABBE?EAJ?U
,H@?KJPNKHOLNKCN=IIAN>QPJKPDANIKOP=PKN1/3„Oš
!"/GC ,
2
IîUNGCUNš
0-=J@#š
"&=J@#š
Calculation 2
=OA@QLKJ=0"!2(=J@>KEHAN=P0-@AB=QHPKBABBE?EAJ?U*K@ANJ-=NP)
?KILHE=JP?KJPNKHOLNKCN=IIANNKKIQJEP1/3„Oš
!"/GC ,
2
IîUNGCUNš
0-=J@!š
"&=J@"š
Calculation 3
=OA@QLKJ=0"!2(=J@>KEHAN=P0-@AB=QHPKBABBE?EAJ?U*K@ANJ-=NP)
?KILHE=JP?KJPNKHOLNKCN=IIANNKKIQJEP1/3„Oš
!"/GC ,
2
IîUNGCUNš
0-=J@!š
"&=J@"š
Calculation 4
=TE"?KCAJSEPDHK=@?KILAJO=PEKJ*K@ANJ-=NP)?KILHE=JP?KJPNKHO=TELNKCN=IIA=>HA
NKKIQJEP1/3„Oš-0/
!"/GC ,
2
IîUNGCUNš
0-=J@!š
"&=J@!š
DER Improvement
over Band G = 44.8%
DER Improvement
over Band B = 21.5%
DER Improvement
over Band A = 12.7%