Microwave Buying Guide: Over-the-Range, Built-In & Countertop

A microwave is the appliance your kitchen uses more than almost any other, yet most people buy one in ninety seconds at a big-box store and regret the fit, the venting, or the wattage for years. The right microwave depends on three decisions: where it mounts, how much power it needs, and whether it has to move air for the range below it. This guide walks through all three so you buy once and buy correctly.

At Urban Supply, we carry microwave ovens from Cosmo, Forno, Summit, and Thor Kitchen spanning countertop, over-the-range, built-in, drawer, and convection models from roughly $300 to $4,799. Here is how to choose the one that actually fits your kitchen.

The Four Microwave Types (and Who Each Is For)

Countertop microwaves are the simplest choice: set it on the counter, plug it into a standard outlet, done. They cost the least and move with you, but they consume counter space and offer no ventilation for your cooktop. Best for renters, small kitchens, or as a secondary unit in a pantry or basement bar.

Over-the-range (OTR) microwaves mount above your cooktop and do double duty as a range hood, pulling steam and smoke through a built-in vent or recirculating filter. They free up counter space and give the kitchen a finished, built-in look. The trade-off is installation: OTR units are heavier, require a dedicated mounting bracket and outlet, and vent either outside (ducted) or back into the room (recirculating).

Built-in microwaves install flush into cabinetry or a wall, often paired with a wall oven in a combination unit. This is the premium, integrated look — the microwave disappears into the kitchen design rather than sitting on top of it. Built-ins usually need a trim kit sized to the cabinet opening, so measure before you buy.

Microwave drawers slide open from below the counter like a dishwasher drawer. They put the appliance at an ergonomic height, keep sightlines clean, and are ideal for islands and universal-design kitchens. They carry the highest price of the four types but deliver the best ergonomics and the cleanest look.

Sizing: Match Cubic Feet to Your Cooking

Interior capacity is measured in cubic feet. Standalone microwaves in our lineup run from about 1.5 to 2.3 cubic feet, while combination microwave–wall-oven units pair the microwave with a full-size lower oven cavity. Capacity is not just about how big a dish fits — it correlates with power and price.

1.5–1.9 cu ft: Compact and countertop units for reheating, single servings, and small households. 2.0–2.2 cu ft: The most common family size, comfortably fitting a dinner plate or a medium casserole dish. 2.3 cu ft and up, including combo and convection units: Large-capacity models for entertainers and anyone who uses the microwave's convection mode as a true second oven. Measure your cabinet opening or counter clearance first — an OTR or built-in that is even a half-inch too wide will not go in.

Wattage: Why It Decides How Well It Cooks

Wattage is the single spec most buyers underestimate. Our microwaves generally deliver 1,000 to 1,200 watts, and that range matters more than any feature list.

Under 800 watts cooks slowly and unevenly, and most package directions on frozen and prepared foods assume you have more power than that. 1,000 watts is the practical floor for a primary kitchen microwave — it matches the cook times printed on food packaging and heats evenly. 1,100–1,200 watts gives you faster, more uniform results and is worth the small premium if the microwave is your main cooking shortcut. When two models are close in price, buy the higher wattage.

Over-the-Range: The Venting Question That Trips People Up

If you are replacing an OTR microwave, the ventilation decision is the one that causes the most callbacks. An OTR microwave has to handle the steam, grease, and smoke your cooktop produces, and it does that one of two ways.

Ducted (vented outside) is the better performer. The blower pushes cooking exhaust through ductwork to the exterior of the home, actually removing heat and moisture. If your kitchen already has a duct run above the range, buy a model that can vent externally and use it.

Recirculating (ductless) pulls air through a charcoal filter and returns it to the room. It captures some grease and odor but does not remove heat or humidity. It is the fallback for interior walls with no duct path. Most OTR units, including the Thor Kitchen and Cosmo models we carry, can be configured either way — confirm your kitchen's duct situation before ordering, because it determines the model and the install.

One more OTR note: these units double as your range hood, so pay attention to the fan's airflow and the light over the cooktop. A microwave that vents well and lights the burners brightly replaces two appliances at once.

Convection Microwaves: A Real Second Oven

A convection microwave adds a heating element and a fan, so it can bake, roast, and crisp — not just reheat. During the holidays or in a kitchen with a single wall oven, that second cooking cavity is genuinely useful: you can roast vegetables in the convection microwave while the turkey occupies the main oven. Combination microwave-wall-oven units, like the Cosmo 30-inch combo in our lineup, stack a full wall oven and a convection microwave in one cabinet cutout, which is the highest-capability configuration for a serious cook.

Microwave Type Comparison

Features Worth Paying For (and Ones to Skip)

Beyond type, size, and wattage, a short list of features genuinely improves daily use. Sensor cooking measures the steam coming off your food and shuts off automatically when it's done — it ends the guesswork of overcooked leftovers and popped-open frozen meals, and it's the one "smart" feature most worth having. Inverter power (a microwave feature, distinct from generators) delivers a steady, lower power level for true defrosting and gentle reheating instead of cycling full-blast on and off, so chocolate melts instead of scorching and fish reheats without rubbering. A quality turntable or flatbed design ensures even heating.

Features that sound impressive but rarely earn their premium: dozens of pre-programmed auto-cook buttons you'll never learn, and gimmick "grill" elements on small units. Spend your money on wattage, sensor cooking, and build quality instead. On over-the-range models, prioritize a bright cooktop light and a stronger vent fan — those you'll use every day.

Measuring and Installation

Installation is where microwave purchases go wrong, and it's entirely avoidable. For an over-the-range unit, measure the width of the cabinet opening (standard is 30 inches, but confirm yours), the height from the cooktop to the bottom of the upper cabinet (building codes and manufacturers specify a minimum clearance above the cooking surface — typically the microwave's own manual dictates it), and locate the electrical outlet and any existing vent duct. For a built-in or drawer model, the cabinet cutout dimensions must match the unit's required opening exactly, and most built-ins need a trim kit sized to that opening — order it with the microwave, not after.

A countertop unit needs only clearance around its vents (usually a few inches on the sides and top) and a nearby outlet. Whatever the type, write down your measurements before you shop and check them against the spec sheet's required-opening dimensions. A microwave that's a half-inch too wide is a return, a restock, and a wasted weekend.

Budget: What You Get at Each Price

Our microwaves run from about $300 to $4,799, and the price tracks type and integration more than raw performance. $300–$600 covers solid countertop and compact built-in units — Summit's compact models live here — with the wattage and capacity most households need. $600–$1,100 is the heart of the over-the-range and mid-tier built-in market, including Thor Kitchen OTR units and Forno drawers, where you gain venting, better fit, and finish. $1,100 and up buys premium drawers, convection models, and combination microwave–wall-oven units like the Cosmo 30-inch combo, where you're paying for a true second oven and integrated design. Buy at the level your kitchen layout demands: a $400 countertop unit at 1,000 watts cooks just as well as a $2,000 built-in — you're paying the premium for the look and the fit, not the heating.

Our Recommendation

For most kitchens with a range against the wall: an over-the-range microwave at 1,000+ watts is the highest-value choice — it clears the counter and vents your cooktop in one appliance. For a design-forward remodel or an island cooktop: a microwave drawer or a built-in paired with a wall oven delivers the cleanest look and the best ergonomics. For a rental, small space, or secondary spot: a countertop unit at 1,000 watts covers everything without installation. Whatever the type, do not drop below 1,000 watts on your primary microwave, and measure the opening twice before ordering an OTR or built-in.

Browse Microwaves at Urban Supply

Explore the full microwave collection to compare countertop, over-the-range, built-in, and drawer models from Cosmo, Forno, Summit, and Thor Kitchen. If you are outfitting a full kitchen, pair your microwave with a matching range, a dedicated range hood, or a wall oven for a coordinated appliance package. Every order over $299 ships free, and our US-based team can help confirm sizing and venting before you buy.

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