Invercargill
Table 5.1: Summary survey data, Invercargill
| Location | Households – 2004 | Sample size | Sample error |
|---|---|---|---|
16,438 | 158 | 7.8% |
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Table 5.2: Domestic home heating methods and fuels, Invercargill
| Households | Winter fuel use (July) | |||
|---|---|---|---|---|
| % | Number | Tonnes/day | % | |
Electricity | 63% | 10,300 | - | - |
Total gas | 18% | 2913 | 3 | 1% |
Flued gas | 5% | 755 | - | - |
Unflued gas | 13% | 2158 | - | - |
Oil | 3% | 416 | 0.1 | 0.0% |
Open fire | 8% | 1248 | - | - |
Open fire: wood | 7% | 1144 | 33 | 7% |
Open fire: coal | 6% | 1040 | 12 | 3% |
Total wood burner | 17% | 2809 | 58 | 13% |
Pre-1994 wood burner | 4% | 733 | 25 | 5% |
1994–99 wood burner | 5% | 855 | 18 | 4% |
Post-1999 wood burner | 7% | 1221 | 16 | 3% |
Multi-fuel burners | 34% | 5514 | - | - |
Multi-fuel burners: wood | 34% | 5514 | 184 | 40% |
Multi-fuel burners: coal | 33% | 5410 | 160 | 35% |
Pellet burners | 2% | 312 | 4 | 1% |
Total wood | 58% | 9467 | 276 | 61% |
Total coal | 39% | 6450 | 172 | 38% |
Total | 63% | 10,300 | ||
* Note: rounding errors may occur in the proportion of burners in different age categories and in types of gas heating.
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Table 5.3: Monthly variations in heating behaviour and fuel use, Invercargill
| Percentage of houses using this method that use it each month | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Gas | 4% | 7% | 19% | 48% | 81% | 81% | 81% | 78% | 70% | 48% | 4% | 4% |
Open fire | 9% | 18% | 18% | 18% | 82% | 100% | 91% | 91% | 73% | 27% | 18% | 9% |
Wood burner | 4% | 4% | 26% | 44% | 78% | 93% | 93% | 96% | 85% | 52% | 11% | 7% |
Multi-fuel | 4% | 2% | 18% | 43% | 86% | 98% | 98% | 96% | 67% | 51% | 6% | 6% |
| Average number of days per week house is heated (only for those heating during that month) | ||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Gas | 4 | 6 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 4 |
Open fire | 2 | 3 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 1 |
Wood burner | 7 | 7 | 6 | 6 | 6 | 6 | 7 | 6 | 6 | 5 | 7 | 7 |
Multi-fuel | 3 | 5 | 6 | 6 | 6 | 7 | 6 | 6 | 6 | 5 | 5 | 5 |
| Daily fuel use (tonnes) | ||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Gas | 0.0 | 0.3 | 0.5 | 1.7 | 3.3 | 3.3 | 3.2 | 3.1 | 2.2 | 1.5 | 0.0 | 0.0 |
Open fire: wood | 0.2 | 0.4 | 0.4 | 0.6 | 32.0 | 36.2 | 33.3 | 33.3 | 45.8 | 44.1 | 0.5 | 0.1 |
Open fire: coal | 0.5 | 2.4 | 2.4 | 4.0 | 10.5 | 15.4 | 12.2 | 11.9 | 8.6 | 3.7 | 2.9 | 0.3 |
Wood burner | 2.0 | 2.0 | 4.7 | 10.6 | 49.9 | 58.3 | 58.4 | 56.9 | 24.1 | 16.5 | 3.1 | 3.1 |
Multi-fuel: wood | 1.5 | 1.5 | 17.1 | 40.1 | 169.6 | 184.8 | 184.0 | 180.4 | 37.6 | 24.7 | 4.4 | 3.9 |
Multi-fuel: coal | 3.2 | 3.0 | 15.9 | 28.6 | 152.3 | 160.0 | 159.7 | 157.6 | 61.0 | 28.8 | 7.0 | 6.6 |
| Daily fuel use (kg) per household (for households using that method) | ||||||||||||
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Gas | 0.0 | 0.1 | 0.2 | 0.6 | 1.1 | 1.1 | 1.1 | 1.1 | 0.8 | 0.5 | 0.0 | 0.0 |
Open fire: wood | 0.1 | 0.3 | 0.3 | 0.5 | 28.0 | 31.6 | 29.1 | 29.1 | 40.0 | 38.5 | 0.4 | 0.1 |
Open fire: coal | 0.5 | 2.3 | 2.3 | 3.9 | 10.1 | 14.8 | 11.7 | 11.4 | 8.2 | 3.6 | 2.8 | 0.3 |
Wood burner | 0.7 | 0.7 | 1.7 | 3.8 | 17.8 | 20.8 | 20.8 | 20.2 | 8.6 | 5.9 | 1.1 | 1.1 |
Multi-fuel: wood | 0.3 | 0.3 | 3.1 | 7.3 | 30.8 | 33.5 | 33.4 | 32.7 | 6.8 | 4.5 | 0.8 | 0.7 |
Multi-fuel: coal | 0.6 | 0.6 | 2.9 | 5.3 | 28.2 | 29.6 | 29.5 | 29.1 | 11.3 | 5.3 | 1.3 | 1.2 |
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Table 5.4: Estimated daily fuel use, by season, Invercargill
| Winter fuel use kg/day | Non-winter fuel use kg/day | |
|---|---|---|
Gas | 2 | 1 |
Open fire: wood | 36 | 40 |
Open fire: coal | 21 | 11 |
Wood burner | 32 | 17 |
Multi-fuel: wood | 37 | 11 |
Multi-fuel: coal | 33 | 14 |
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Table 5.5: Average monthly heating costs (winter), Invercargill
| Winter month cost | |
|---|---|
Electric | $119 |
Gas | $115 |
Open fire | $55 |
Wood burner | $60 |
Pellet burner | $76 |
Multi-fuel | $155 |
Oil | $123 |
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Table 5.6: Type of electric heating, Invercargill
| Night store | Radiant | Portable oil column | Panel | Fan | Heat pump | Don't know/ refused | Other | |
|---|---|---|---|---|---|---|---|---|
Households | 2185 | 1352 | 1769 | 624 | 2913 | 3121 | - | 624 |
Percent | 21% | 13% | 17% | 6% | 28% | 30% | - | 6% |
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Table 5.7: Home heating method, by house ownership, Invercargill
| Households living in rental | Percent living in rental | Households living in own house | Percent living in own house | |
|---|---|---|---|---|
Total | 3745 | 23% | 12,693 | 77% |
Electric | 2601 | 25% | 7699 | 75% |
Gas | 1248 | 43% | 1665 | 57% |
Open fire | 312 | 25% | 936 | 75% |
Wood burner | 312 | 11% | 2497 | 89% |
Pellet burner | 0 | 0% | 312 | 100% |
Multi-fuel | 832 | 15% | 4682 | 85% |
Oil | 104 | 25% | 312 | 75% |
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Table 5.8: House insulation summary statistics, Invercargill
| Insulation type | Degree of insulation | |||
|---|---|---|---|---|
| Households | % | |||
Ceiling | 12,276 | 75% | No insulation | 11% |
Under floor | 1977 | 12% | 1 type* | 31% |
Wall | 6762 | 41% | 2 types | 34% |
Cylinder wrap | 2809 | 17% | 3 types | 9% |
Double glazing | 1561 | 9% | 4 types | 7% |
None | 1769 | 11% | 5 types | 0% |
Don't know | 1144 | 7% | Don't know | 7% |
Other | 416 | 3% | ||
* One type means the household has just one of: ceiling, under floor or wall insulation, a cylinder wrap or double glazing; two types are any two of these, etc.
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Table 5.9: Degree of house insulation, by heating method, Invercargill
| Degree of insulation | Electric | Gas | Wood burner | Multi-fuel | Open fire |
|---|---|---|---|---|---|
1 type | 34% | 36% | 30% | 36% | 17% |
2 types | 31% | 21% | 41% | 36% | 25% |
3 types | 8% | 0% | 15% | 6% | 17% |
4 types | 8% | 7% | 4% | 9% | 0% |
5 types | 0% | 0% | 0% | 0% | 0% |
None or don't know | 18% | 36% | 11% | 13% | 42% |
Total | 100% | 100% | 100% | 100% | 100% |
* Note: columns may not sum exactly to 100 due to rounding error.
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Table 5.10: Home heating method, by household income, Invercargill
| Electric | Gas | Wood burner | Multi-fuel | Open fire | |
|---|---|---|---|---|---|
Non-response | 27% | 21% | 15% | 28% | 42% |
Less than $20,000 | 18% | 18% | 11% | 9% | 17% |
$20,000 to $30,000 | 15% | 25% | 22% | 13% | 0% |
$30,000 to $40,000 | 6% | 11% | 7% | 11% | 17% |
$40,000 to $50,000 | 10% | 0% | 11% | 8% | 0% |
$50,000 to $70,000 | 9% | 11% | 15% | 19% | 8% |
$70,000 to $100,000 | 7% | 11% | 11% | 6% | 17% |
More than $100,000 | 6% | 4% | 7% | 6% | 0% |
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Table 5.11: Home heating method, by age of dwelling, Invercargill
| Age of dwelling | Electric | Gas | Wood burner | Multi-fuel | Open fire |
|---|---|---|---|---|---|
10 years or less | 8% | 4% | 4% | 2% | 0% |
11–20 years | 7% | 11% | 4% | 9% | 0% |
21–40 years | 38% | 21% | 33% | 34% | 50% |
41+ years | 34% | 39% | 56% | 43% | 42% |
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Table 5.12: Home heating method, by number of bedrooms, Invercargill
| Number of bedrooms | Electric | Gas | Wood burner | Multi-fuel | Open fire |
|---|---|---|---|---|---|
1 | 2% | 0% | 0% | 0% | 0% |
2 | 28% | 18% | 11% | 6% | 0% |
3 | 56% | 61% | 74% | 74% | 75% |
4 | 9% | 14% | 11% | 17% | 17% |
5 | 2% | 4% | 4% | 2% | 8% |
6 | 0% | 0% | 0% | 0% | 0% |
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Tables for Section 5
November 2005
© Ministry for the Environment