Proposal for zero energy housing designs in Jordan

Table 15 Cost estimation comparison: code compliant vs. zero-energy houses in Amman

Components/Building systems	Average cost of code compliant house (USD)	Average cost of proposed zero energy house (USD)	Average additional cost of zero energy house (USD)	Average additional cost per m² (USD)	Area/No
Envelopea
Walls insulation	637(5 cm)	1527 (12 cm)	890	7.75	113
Slab insulation	1031 (5 cm)	2476 (12 cm)	1444	7.9	183
Roof insulation	987 (5 cm)	3354 (17 cm)	2367	13.5	175
Windows and doors	6977 (Double)	8914 (Triple)	1938	35.3	55
Lighting	352	493	141	0.85	50
Water heating, Heating and cooling system	14,094 (Diesel Central Heating Radiators + Mini Split Air Conditioners)	7047 (air-to-air heat pump for heating, cooling, hot water) [93]	− 7047	− 41	175
Total cost (Before installing PV system)	24,077	23,811	− 227	− 1.3	–
Total energy consumption	26,250 kWh year	10,500 kWh year	− 15,750 kWh year	–	–
Renewable energy system^c	4180	2508	− 1672	− 9.4	1
Total cost (After installing PV system)	28,257	26,319	− 1938	− 11	–

Plug equipment was excluded owing to negligible variations in price and energy consumption, and the focus was on cost savings throughout the construction phase
^aThe cost of 1 m³ of rigid foam was 113 USD (average price in October 2023). All prices are in United States dollars (1 $ = 0.71 JD)
^bCentral heating radiators using diesel are the most common used space heating methods in Amman
^cGiven that the building code doesn't mandate a renewable energy system, assessing only one scenario with renewable energy systems may lead to an incomplete comparison

ISSN: 2192-0567