| House at Carvalhal Pequeno | |||
| RdC | 1st | ||
| l | 21.5 | 13.25 | m |
| w | 8.75 | 6.5 | m |
| h | 2.5 | 2.5 | m |
| footprint | 188 | m^2 | |
| gross wall surface | 250 | m^2 | |
| windows | 30 | m^2 | |
| walls | 220 | m^2 | |
| volume | 686 | m^3 | |
| Air change | 2 | per hour (total guess!) | |
| shc air by volume | 1000 | kJ / m^3 | |
| air change W per Delta T | 381 | W/K |
| Heat Demand By Scenario, per degree difference to ambient | ||||
| Cost | Total | Action | ||
| A | 0 | 0 | Baseline, U values are guesswork | |
| B | 10000 | 10000 | Insulate roof, add R2 | |
| C | 13000 | 23000 | EWI/ETICS add R1.3 | |
| D | 10000 | 33000 | Replace windows with double glazed units | |
| A | B | C | D | |
| U roof | 1.20 | 0.35 | 0.35 | 0.35 |
| U wall | 1.20 | 1.20 | 0.47 | 0.47 |
| U floor | 1.20 | 1.20 | 1.20 | 1.20 |
| U windows | 4.00 | 4.00 | 4.00 | 1.20 |
| Floor adjustment | 0.5 | Fudge: the ground temperature under the house does not change as fast as the outside temperature | ||
| ACH adjustment | 0.5 | Fudge: assume that replacing the windows fixes a major cause of ingress | ||
| Heat load per Delta T | ||||
| H roof | 226 | 66 | 66 | 66 |
| H wall | 264 | 264 | 103 | 103 |
| H floor | 113 | 113 | 113 | 113 |
| H windows | 120 | 120 | 120 | 36 |
| H air | 381 | 381 | 381 | 190 |
| H total | 1104 | 944 | 783 | 509 |
| Energy Loads, by average monthly temperature difference | |||||||||||
| Avg temp diff. | 3 | 9 | 12 | 15 | Margin | Capacity kW | |||||
| H:A | 3311 | 9932 | 13242 | 16553 | 25% | 20.7 | Baseline | ||||
| H:B | 2833 | 8498 | 11330 | 14163 | 25% | 17.7 | Insulate roof | ||||
| H:C | 2350 | 7050 | 9400 | 11749 | 25% | 14.7 | EWI | ||||
| H:D | 1527 | 4580 | 6106 | 7633 | 25% | 9.5 | Double glazing | ||||
| W | W | W | W | ||||||||
| Monthly Energy Demand | daily max | ||||||||||
| kWHrs:A | 2384 | 7151 | 9534 | 11918 | 397 | ||||||
| kWHrs:B | 2039 | 6118 | 8158 | 10197 | 340 | ||||||
| kWHrs:C | 1692 | 5076 | 6768 | 8460 | 282 | ||||||
| kWHrs:D | 1099 | 3297 | 4396 | 5496 | 183 | ||||||
| kWHr | |||||||||||
| Total demands, simple climate 'model' | prices | 0.1 | 0.06 | 0.05 | 0.035 | €/kWHr | |||||
| Months | 2 | 1 | 1 | 0.5 | annual | oil 2013 | oil 2015 | pellet | ashp COP3.5 | ||
| kWHrs:A | 4767 | 7151 | 9534 | 5959 | 27412 | 3289 | 1645 | 1371 | 959 | ||
| kWHrs:B | 4079 | 6118 | 8158 | 5099 | 23453 | 2814 | 1407 | 1173 | 821 | ||
| kWHrs:C | 3384 | 5076 | 6768 | 4230 | 19457 | 2335 | 1167 | 973 | 681 | ||
| kWHrs:D | 2198 | 3297 | 4396 | 2748 | 12640 | 1517 | 758 | 632 | 442 | ||
| kWHr | € | € | € | € | |||||||
| peak pellets | |||||||||||
| daily | monthly | annual | |||||||||
| kg:A | 83 | 1986 | 5711 | ||||||||
| kg:B | 71 | 1700 | 4886 | ||||||||
| kg:C | 59 | 1410 | 4054 | ||||||||
| kg:D | 38 | 916 | 2633 | ||||||||