Propane vs natural gas: which one is really cheaper?

Is propane cheaper than natural gas for heating? The reality behind the cost of cylinders

The question of whether bottled gas is more economical than natural gas is one of those debates where the nominal price doesn't tell the whole story. The perception of substantial savings with propane or butane is largely based on the natural gas tariff and the household's specific consumption. Analysing this switch requires breaking down fixed costs, energy efficiency and, of course, the logistics of hauling cylinders.

The trap of the natural gas standing charge

A recurring argument is that natural gas, with its fixed tariffs and meter rental, penalises low-usage households. Some claim that if you use little, natural gas becomes an unavoidable fixed expense, while propane, being a supply model based on volume, imposes no such upfront costs. However, this advantage disappears when total annual consumption is considered, especially in cold climates, where the need for heating dramatically increases spending on cylinders.

Cost calculations per kWh: science against the myth

Some analyses suggest that, when comparing the cost per kWh of butane —calculated using the higher heating value and assuming an efficient boiler— the gap with natural gas is narrow. Comparisons have been presented where, for example, high annual natural gas consumption outweighs the value of butane. But the comfort factor is a weight that doesn't enter the pure equations; who wants to handle 46 cylinders a year to keep warm? Real-world experience, as seen in documented cases, shows that managing multiple cylinders is a considerable logistical burden.

The practical experience: logistics and comfort versus theoretical savings

Economic theory clashes with everyday reality. There are reported cases where fuel cost savings are evident, with figures suggesting significant reductions in winter bills. However, this gain is offset by the physical effort of hauling heavy cylinders or the need to manage heating systems spread across different rooms. Moreover, the safety factor cannot be ignored; natural gas installations, although complex, centralise the risk in the building's infrastructure, unlike multiple independent units.

With these differences, the decision comes down to whether the monetary savings justify the operational complexity and the risks associated with relying on a bottled supply. In the end, every case is an exercise in personal arithmetic, and absolute truth, in these matters, is a luxury nobody can afford.

Related debates in the forum

• ELECTRIC CARS CRASH. Billion-euro losses in the industry. · 324 replies
• Additional insulation for your home · 574 replies
• Have you been ripped off with your electricity bill this month? · 2651 replies
• Is it worth insulating windows with films? · 54 replies