Running Costs of LPG
LPG gas seems cheap
when you fill up a bottle at the gas station or get it delivered
to your door. This is because it is sold by the kilogram instead
of Kilowatt as other energy forms are. This is makes it difficult
to compare prices.
The maths of the
situation are this -
One kilogram of
LPG is equal to 50 Megajoules. 50Megajouls divided by 3.6
= 13.89 kilowatts.
If each kilogram
of LPG is sold for $1.70 then 1.70 divided by 13.89kilowatts
= $0.12 cents per kilowatt is the price energy is sold for.
Compare this to
Electricity at 9 cents to 13.4 cents and natural gas at 4
to7 cents per kilowatt and it is clear it is not that cheap.
Consider also the inconvience and cost
of having to fill bottles, convert appliances, obtain dangerous
goods licences if a large quantity is stored, the unsightly
bottles and cages, the expensive appliances compared to electricity.
Purchasing LPG in small quantities
at gas stations is higher still.
Consider also that
large appliances use a lot of LPG very quickly and the bottles
lose heat quickly due to a process called latent heat of vapourisation.
Ie when gas loses pressure it needs a lot of heat energy to
do this and the result is the bottles and regulators can freeze
up stopping the flow of gas till the regulators thaw out.
This is over come
by using twin bottles on either side of the change over valve.
Appliances that
use large quantities of gas also need changing often depending
on the amont used.
Prices as at 1/Oct/2003
Changing
to Gas from Electric
Water Heater Change
Overs
This is the most
common change over. The most common reasons are reclaiming
the space of the hot water cylinder inside by putting the
water heating unit outside, getting more hot water, reducing
the hot water bill, increasing the value of the property by
having gas hot water.
The most common
conversion is installing a Continuous Flow or storage tank
unit on an outside wall.
Costs of Conversion
The standard price
consists of
1. Removal of the
existing hot water tank if possible ie its not in the roof
space where we can not get it out.
2. Running a gas
pipe from another large gas pipe in the house to the water
heater which is sited 500mm from any corner of a building
or opening window and is not less than 1.5m under an opening
window.
3. Run a cold water
supply to it and a hot pipe from it to the nearest hot pipe
in the house. Most installations are 20m of pipe work in total.
Our standard price is based on this. See our Pricing
Page (Under Construction)
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