With electricity bills climbing and gas prices unpredictable, the question of how to heat your home efficiently through a Pakistani winter is more pressing than it used to be. Heat and cool inverter ACs have emerged as a serious contender against traditional gas heaters, and for many households the running cost comparison is closer than most people expect. This guide breaks down both options honestly so you can make the right call for your home.
How Each System Works
A heat and cool inverter AC uses a reverse refrigeration cycle to extract heat from outdoor air and move it inside. Even in cold weather, outdoor air contains enough heat energy to make this work efficiently. The key metric is the coefficient of performance (COP): a well-designed inverter AC can deliver 3 to 4 units of heat for every 1 unit of electricity consumed, which is significantly better than a direct electric heater that delivers exactly 1 unit of heat per unit of electricity.
A gas heater, whether it burns natural gas or LPG, converts fuel to heat through combustion. The efficiency of a modern gas heater is high in absolute terms, typically 80 to 95 percent of the gas energy converted to usable heat. But the comparison with an inverter AC on running cost depends entirely on the current price ratio between electricity and gas in your area.
Running Cost: The Numbers That Matter
To make a fair comparison, you need to estimate the cost per unit of heat delivered rather than the cost of the fuel alone. In Pakistan today, natural gas for domestic use remains subsidised and is substantially cheaper per unit of heat than electricity. On that basis, a gas heater running on natural gas will typically cost less per hour of heating than even an efficient inverter AC.
The situation shifts meaningfully in two scenarios. First, if you are on LPG rather than the city gas network, the price gap narrows considerably because LPG is priced closer to unsubsidised market rates. Second, if you are already paying for electricity and the inverter AC is your primary cooling unit in summer, the cost of running it for heating in winter is partially offset by the fact that you have already paid for the unit and its installation. The marginal running cost of heating with an existing inverter AC is lower than the full cost of buying and installing a separate gas heater.
As a practical reference point: a 1.5-ton inverter AC like the Midea Eco 1.5 Ton Heat and Cool running in heating mode at moderate load will draw roughly 800W to 1,200W of electricity to deliver 1.5 to 2 times that in heat output. At current NEPRA residential tariffs, that works out to approximately Rs 15 to Rs 22 per hour depending on your slab. A comparable gas heater on natural gas in most cities runs closer to Rs 8 to Rs 12 per hour.
A 2-ton model like the Gree Pular 2 Ton Heat and Cool covers a larger space and draws proportionally more power, but the efficiency ratio stays similar. The decision between sizes should follow room area first, not the cost comparison.
Where Inverter ACs Win on Heating
Running cost is not the whole picture. Inverter ACs have meaningful advantages over gas heaters in specific situations.
Sealed apartments without gas connections are the clearest case. If your building has no gas line, an electric heating option is your only choice, and an inverter AC is far more efficient than direct electric heaters like bar heaters or convection panels. The COP advantage means you are spending two to three times less on electricity than you would with a basic electric heater.
Safety is another genuine advantage. Gas heaters in enclosed spaces carry carbon monoxide risk if ventilation is inadequate. An inverter AC has no combustion and no exhaust, making it the safer choice for bedrooms, studies, and any room where the heater runs overnight or with the door closed.
Temperature control is also superior. A modern inverter AC maintains a set temperature precisely, cycling its compressor up and down to hold the room steady. Gas heaters typically run at fixed output, which means rooms overheat and then cool, requiring you to manually adjust or switch the unit on and off.
When a Gas Heater Makes More Sense
Gas heaters remain the practical choice for larger open-plan spaces, houses with multiple rooms to heat simultaneously, or households where the gas connection is reliable and the monthly bill is a primary concern. A large gas heater can heat a 400 to 500 square foot room faster than most residential inverter ACs, and the upfront cost of a good gas heater is lower than a heat-and-cool AC system.
For households heating multiple rooms, the economics also differ: one gas heater moved between rooms or a ducted gas system serves multiple spaces for the price of one unit, while achieving the same with inverter ACs requires one unit per room.
If you are considering electric alternatives beyond inverter ACs, the electric heater range covers oil-filled radiators, fan heaters, and quartz heaters, each suited to different room sizes and usage patterns.
Making the Call
The honest answer is that neither option dominates across all situations. For apartments without gas, a heat and cool inverter AC is the clear winner. For large houses on natural gas with multiple rooms to heat, a gas heater wins on cost. For households that already own an inverter AC and want to use it year-round, heating mode costs more per hour than gas but requires no additional investment.
Before deciding, it is worth reading through the guides on how much electricity an inverter AC actually saves and which AC size fits your room, as both affect the real-world running cost. If you are comparing T1 versus T3 compressor specs between brands, the T1 vs T3 compressor guide covers that distinction. Browse the full inverter AC and Gree inverter AC ranges at Friends Corporation to compare models currently in stock.
