{"id":6399,"date":"2026-04-09T22:00:45","date_gmt":"2026-04-09T22:00:45","guid":{"rendered":"https:\/\/avenirenergy.ca\/?p=6399"},"modified":"2026-06-09T13:44:59","modified_gmt":"2026-06-09T13:44:59","slug":"how-does-a-propane-fridge-work","status":"publish","type":"post","link":"https:\/\/avenirenergy.ca\/fr\/blog\/how-does-a-propane-fridge-work\/","title":{"rendered":"Comment fonctionne un r\u00e9frig\u00e9rateur au propane\u00a0? Guide complet pour les propri\u00e9taires"},"content":{"rendered":"
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Perspectives sur le propane<\/span><\/p>

Comment fonctionne un r\u00e9frig\u00e9rateur au propane\u00a0? Guide complet pour les propri\u00e9taires<\/h1>

Propane refrigerators are the practical choice when you want a fridge that keeps running through power outages without skipping a beat. The core technology has been around since the 1920s and hasn’t changed much, which tells you something about how reliable it is.\u00a0<\/span><\/p>

\"Propane<\/figure><\/header>
Propane refrigerators are the practical choice when you want a fridge that keeps running through power outages without skipping a beat. The core technology has been around since the 1920s and hasn’t changed much, which tells you something about how reliable it is.<\/span>We deliver propane to properties across Canada, including a lot of remote cottages and seasonal retreats where all or most of the appliances run on propane. Propane fridges are one of the most common appliances we encounter at these properties, and the first thing most people find surprising: a propane refrigerator uses heat to create cold. There’s no compressor, no electrical connection required, and almost no moving parts. The cooling happens entirely through a chemical cycle driven by a small propane flame – the same fuel that’s running your furnace or water heater.<\/span>The questions we get most often are how they actually work, how to keep them running through the season, and what to do when they stop cooling. This post covers all three.\u00a0<\/span>

If you’re setting up a cottage or off-grid property and want to sort out<\/span><\/i> propane delivery<\/span><\/i><\/a> for the season at the same time, we can help with that.<\/span><\/i><\/p>

What Is a Propane Refrigerator?<\/b><\/h2>

A propane refrigerator is a gas-powered appliance that <\/span>cools its interior using heat from a propane burner rather than electricity<\/b>. The cooling process is called absorption refrigeration, and it relies on a sealed system containing three substances: ammonia, water, and hydrogen gas. None of these substances leave the system – the cycle runs continuously and the chemicals just change form and location as the process repeats.<\/span><\/p>

The comparison with a standard electric fridge is worth spelling out. An electric compressor fridge uses a motor-driven compressor to compress and expand a refrigerant, moving heat from inside the cabinet to outside it. The compressor is what hums – and the part that eventually fails. A propane fridge replaces the compressor with heat. The ammonia-water-hydrogen system does the same job – moves heat out of the cabinet – but without mechanical compression and without electricity. If you’re already running a furnace, water heater, or range on propane at a remote property, a propane fridge fits into the same residential propane setup without adding another fuel type to manage.<\/span><\/p>

The practical result: propane fridges are essentially silent, have very few parts that can break, and will run as long as the propane supply holds.<\/span><\/p>

The Absorption Refrigerator Propane System Explained<\/b><\/h2>

The absorption cycle has four stages. Each one feeds into the next, and the cycle runs continuously while the burner is on. The whole process happens inside a sealed network of tubes and chambers welded into the back of the unit.<\/span><\/p>

Step 1: Propane Burner Creates Heat<\/b><\/h3>

A small propane flame at the base of the unit heats a mixture of ammonia dissolved in water, stored in the generator. The heat causes the ammonia to boil off and separate from the water as a hot gas. This is the starting point of every cycle – heat goes in, and cooling follows as a consequence.<\/span><\/p>

Step 2: Condensation<\/b><\/h3>

The ammonia gas rises through condenser coils on the back of the fridge. As it moves through the coils and loses heat to the surrounding air, it cools and condenses back into liquid ammonia. This is why the back of a propane fridge gets warm – it’s releasing the heat the ammonia collected.<\/span><\/p>

Step 3: Evaporation and Cooling<\/b><\/h3>

Liquid ammonia flows into the evaporator, which sits inside the refrigerator compartment. Here it mixes with hydrogen gas. In the presence of hydrogen, ammonia evaporates at a much lower temperature than it normally would. Evaporation pulls heat from its surroundings – from inside the fridge – to fuel itself. The temperature inside the cabinet drops because the ammonia-hydrogen mixture is actively drawing heat out of that space. This is the stage where the actual cooling occurs.<\/span><\/p>

Step 4: Absorption and Cycle Reset<\/b><\/h3>

The ammonia gas, now carrying heat it absorbed from inside the fridge, flows into the absorber and dissolves back into the water. The water releases the hydrogen gas, which returns to the evaporator. The ammonia-water mixture flows back to the generator to begin the cycle again. The loop runs continuously with no pump, no compressor, and no external intervention.<\/span><\/p><\/section>

Why Propane Fridges Are Popular in Canada<\/b><\/h2>

Le<\/span> Association canadienne du propane<\/span><\/a> identifies propane refrigerators as a practical solution for off-grid homes and cottages, particularly because they continue operating independent of the electrical grid. For a seasonal property in a remote area, that reliability is the whole point.<\/span><\/p>

A few reasons they’re a standard choice for remote and off-grid properties:<\/span><\/p>