The Thermador PRG486WDG is the 48-inch Pro Grand all-gas range, and the PRD486WDGU is its dual fuel sibling with the same six Star Burners and integrated griddle but an electric oven. Choose the all-gas PRG486WDG if you want a gas oven and the simplest utility setup, and the dual fuel PRD486WDGU if you want electric oven baking and have a 240V circuit available. The PRD486GDGU adds a steam-assist oven, and the Pro Harmony PRL486WDH is the flush-mount 48-inch alternative.
What is the difference between the Thermador PRG486WDG and the PRD486WDGU?
The model letters tell the story. In the Thermador range names on our model list, PRG marks an all-gas range and PRD marks a dual fuel range, and both of these are 48-inch Pro Grand models. The cooktop is the same in spirit: six Star Burners and an integrated griddle. The difference is below the cooktop. The PRG486WDG has dual gas ovens with convection, while the PRD486WDGU pairs the gas cooktop with electric ovens. Our guide to reading a Thermador model number explains how to decode the rest of the letters.
Gas ovens add moisture to the cavity and tend to brown and roast beautifully, while electric ovens hold temperature more steadily, which many bakers prefer for cakes, pastry and bread. If most of your cooking is on the cooktop and in the oven for roasts, either one is a fine choice. If you bake often and care about precision, the dual fuel PRD486WDGU is the stronger fit.
Which Thermador 48-inch range is right for your kitchen?
Start with what you can supply. All four models need a gas line, and the dual fuel models also need a 240V electrical circuit of the size given in the installation instructions. A kitchen that has gas but no 240V circuit in the right spot can still take the PRG486WDG without an electrician, while the dual fuel models add electrical work to the plan. For the clearances, cutout and gas connection, read our Thermador range installation guide before you place the order.
Then think about the oven. The PRD486GDGU brings a steam-assist oven for bread and reheating, which helps if you cook that way but adds a water reservoir to the routine. The PRL486WDH, from the Pro Harmony line, offers the same six burners and griddle in a flush-mount design that sits level with the countertop, which looks cleaner but changes how the range fits the cabinets around it.
What do six Star Burners and a griddle mean in daily use?
Star Burners are Thermador’s burner design with a star-shaped flame pattern that spreads heat across the pan, and the Pro Grand models pair six of them with a built-in griddle. That layout gives you a wide, flat cooking surface for pancakes, vegetables and burgers alongside enough burners for a dinner party. Many Star Burners also include the ExtraLow setting for delicate sauces and melting chocolate. Our explainers on how the Thermador Star Burner works and what ExtraLow means cover both.
A griddle is one of the first things owners start to love and one of the first things they neglect. It needs seasoning and cleaning after use; see our Thermador range griddle care guide to keep it in good shape.
What ventilation does a 48-inch Thermador range need?
A 48-inch range with six high-output burners is a large heat source, and it needs a hood sized to match. On our model list, the Professional 48-inch wall hood HPCB48NS lists 1,200 CFM and the 48-inch liner insert HMCN48FS lists 1,000 CFM, which gives you an idea of the airflow class to look at. Make-up air, the fresh air that replaces what the hood exhausts, is often required with a powerful hood, so ask your installer and your local code office before you finalize the plan. Our guide to Thermador vent hood CFM explains how to size the hood.
What should you check before the range is delivered?
A 48-inch range is heavy and awkward, so plan the path from the truck to the kitchen. Measure doorways, hallway turns and any steps, and ask the delivery crew whether the range can be moved on its back wheels or has to be carried. Confirm that the gas shutoff valve is within reach, that the floor can carry the weight and that the finished cutout matches the width in the installation instructions. Have the anti-tip bracket installed as the instructions require, because a heavy range with open oven doors can tip if it is not anchored. Finally, ask for the gas to be tested for leaks with the proper solution after the connection, not with a match.
Is a 48-inch Thermador range worth the investment?
It is worth it if you cook often, entertain regularly or want a professional-style cooktop and a second oven that lets you bake two dishes at different temperatures. It is less compelling in a small kitchen, where the range, the hood and the make-up air system take up a lot of space and budget. If you are comparing it with a 36-inch model, remember that the oven capacity and the number of burners change, so compare your actual cooking, not only the width. Our Thermador range buying guide compares the full line, and our Pro Grand guide covers the series in more depth.
