Baxi ECOGEN Product Manual page 16

Legislation
SAP example
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
Calculation 1
Calculation 2
Calculation 3
Calculation 4
DER Improvement
over Band G = 44.8%
16
2
2
2
2
DER Improvement
over Band B = 21.5%
DER Improvement
over Band A = 12.7%