Evaluation of Gas-Fired Combi Boilers with HF-AHP-MULTIMOORA

Table 3

Evaluation criteria for combi boilers.

	Criteria	Explanations
C1	Space and water heating capacity	The spatial heating capacity of the combi boiler
C2	Maximum space and water heating temperature	The maximum space and water temperature that the combi boiler provides
C3	Natural gas and electricity consumption reduction	The natural gas and electricity consumption level of the product
C4	Noise level reduction	The noise level of the product
C5	NOx emission reduction	The NOx emission level of the product
C6	Condensing boiler	Whether the combi boiler is condensing one or not
C7	Price efficiency	The price of the product compared to similar products in the market
C8	Product design	The product design and its attractiveness
C9	Digital level of the product	How advanced the digital level of the product
C10	Security level	Gas and water security level of the product
C11	Warranty period	Warranty period that manufacturing company provides
C12	Reliable brand	The brand perception among customers
C13	End-user satisfaction	Customer satisfaction
C14	Customer service	Customer service provided by the manufacturing company
C15	After-sales service	Service provided by the company after sale