Breville BOV845BSS vs BOV900BSS: Which Smart Oven Actually Earns Counter Space?
Breville built both the BOV845BSS Smart Oven Pro and the BOV900BSS Smart Oven Air Fryer Pro around the same Element iQ heating philosophy, but they land in noticeably different places on the countertop-oven spectrum. One is a focused convection oven and toaster built around ten dependable presets. The other stretches into air frying, dehydrating, and dough proofing, with a larger cavity to match.
The main difference between the Breville BOV845BSS and BOV900BSS comes down to scope: the BOV900BSS adds air fry, dehydrate, and proof settings along with roughly 25% more interior room, while the BOV845BSS sticks to toasting, baking, roasting, broiling, and slow cooking in a more compact footprint.
Below, we break down full specifications, smart technology, capacity, build quality, and real-world performance for both ovens, so you can match the right one to how your kitchen actually cooks.
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Meet the Models
Model Overview
Breville BOV845BSS Smart Oven Pro
A convection toaster oven built around ten guided presets, a five-element Element iQ system, and a 0.8 cubic foot cavity sized for everyday toasting, baking, and roasting.
- 1800W, 5 quartz heating elements
- 10 functions incl. slow cook up to 10 hours
- Magnetic auto-eject rack
Breville BOV900BSS Smart Oven Air Fryer Pro
The larger sibling, adding air fry, dehydrate, and proof to the lineup, with a 1.0 cubic foot interior and super convection for faster, crisper results on bigger batches.
- 1800W, up to 6 independent quartz elements
- 13 functions incl. air fry & dehydrate
- Fits a 13" pizza or small turkey
Side by Side
Full Specs Table
| Spec | BOV845BSS | BOV900BSS |
|---|---|---|
| Wattage | 1800W | 1800W |
| Heating elements | 5 quartz | Up to 6 quartz |
| Interior capacity | 0.8 cu ft | 1.0 cu ft |
| Number of functions | 10 | 13 |
| Air fry setting | No | Yes |
| Dehydrate setting | No | Yes, up to 4 trays |
| Proof setting | No | Yes |
| Slow cook | Yes, up to 10 hrs | Yes, up to 10 hrs |
| Convection type | Standard convection | Super convection, 2-speed fan |
| Toast capacity | 6 slices | 9 slices |
| Pizza capacity | Personal size | Up to 13" |
| Muffin tray | Not specified | 12-cup |
| Approx. exterior size | 18.5" x 15.75" x 11" | Larger footprint |
| Display | Backlit LCD, dial controls | Backlit LCD, dial controls |
| Rack ejection | Magnetic auto-eject | Magnetic auto-eject |
| Interior finish | Non-stick walls | Non-stick walls |
| Included accessories | Pan, tray, rack | Pizza pan, 2 racks, broil rack, roasting pan, air fry/dehydrate basket |
| Finish | Stainless steel | Brushed stainless steel |
| Warranty | Standard limited | 2-year limited |
Under the Hood
Smart Technology
Both ovens run on Breville's Element iQ system, which reads the selected function and reroutes power to the heating elements that matter most for that job, rather than firing every element at full strength for every task. On the BOV845BSS, that logic is applied across five quartz elements tuned for toasting, baking, roasting, and broiling.
The BOV900BSS extends the same idea across additional independent elements and pairs it with digital PID temperature control, which continuously measures and corrects internal temperature to reduce the cold spots that can undercook the edges of a tray. Its two-speed convection fan adds a "super convection" mode specifically for air frying and dehydrating, where a stronger, sustained airflow is what actually crisps or dries the food.
Room to Cook
Capacity & Batch Size
The BOV845BSS's 0.8 cubic foot interior comfortably handles six slices of toast, a personal pizza, or a standard baking sheet cut down to fit, which suits a couple or a small household reheating and baking in modest batches.
The BOV900BSS's 1.0 cubic foot cavity is built for bigger cooking: nine slices of toast, a full 13-inch pizza, a 9-by-13-inch baking pan, a 12-cup muffin tray, or a small turkey up to roughly 14 pounds. If you regularly cook for a family or host, that extra room removes a lot of the "will this actually fit" guesswork.
Fit & Finish
Design & Build Quality
Both models share Breville's familiar dial-and-display layout: a function dial on the left, a time/temperature dial on the right, and a backlit LCD screen in between that shows the active preset, remaining time, and temperature. Insulated double-wall doors with large glass windows let you check progress without losing heat, and both use non-stick interior walls with a pull-out crumb tray for cleanup.
The BOV900BSS is the larger appliance overall, which buys extra capacity at the cost of more counter footprint, so measuring your available space before buying matters more with this model than with the more compact BOV845BSS.
In the Kitchen
Real-World Performance
For core tasks like toasting bagels, baking cookies, and roasting vegetables, both ovens perform similarly thanks to the shared 1800W output and Element iQ logic. Where they diverge is in specialized cooking: the BOV900BSS's super convection setting is what actually delivers air-fried crispness on foods like fries or wings, a result the BOV845BSS's standard convection setting cannot fully replicate.
The BOV900BSS's dehydrate function, running across up to four trays at once, is also useful for anyone drying fruit, jerky, or herbs, a use case the BOV845BSS simply does not address. Meanwhile, the BOV845BSS's smaller cavity heats up and stabilizes slightly faster on quick tasks, since there is less air volume to bring to temperature.
Match It to Your Cooking
Which Fits Your Cooking
Weeknight toast & reheats
Quick, everyday tasks for one or two people are handled comfortably by the smaller cavity.
BOV845BSSAir-fried weeknight dinners
Crispy fries, wings, and roasted veg need the super convection air fry setting to really deliver.
BOV900BSSSmall-batch baking
Cookies, personal pizzas, and small trays don't need the extra room the larger model offers.
BOV845BSSFamily-size roasting
A 13-inch pizza, a full sheet pan, or a small turkey call for the larger 1.0 cu ft cavity.
BOV900BSSHomemade bread & dough
A dedicated proof setting for rising dough at a controlled low temperature is exclusive to one model.
BOV900BSSTight counter space
A smaller footprint matters most in compact kitchens where every inch of counter is spoken for.
BOV845BSSWeigh It Up
Pros & Cons
Breville BOV845BSS
- Smaller footprint for tight counters
- Ten reliable, focused presets
- Slow cook function up to 10 hours
- Generally lower price point
- No air fry, dehydrate, or proof settings
- Smaller 0.8 cu ft cavity limits batch size
- Tighter fit for full-size baking pans
Breville BOV900BSS
- Air fry, dehydrate, and proof settings
- Larger 1.0 cu ft interior fits bigger meals
- Super convection for crisper, faster results
- More included accessories
- Larger footprint takes up more counter space
- Higher price than the BOV845BSS
- More functions can mean a steeper learning curve
Bottom Line
Final Verdict
The main difference between the Breville BOV845BSS and BOV900BSS is capability versus footprint. The BOV900BSS is the stronger all-around countertop oven if you want air frying, dehydrating, proofing, and room for family-size meals, and its extra cost buys real, usable functionality rather than just a bigger badge. The BOV845BSS remains an excellent choice for anyone who mainly toasts, bakes, and roasts in smaller batches and wants to save both counter space and money.
Our Pick: Breville BOV900BSS
For most households, the extra capacity and air fry/dehydrate/proof functions on the BOV900BSS make it the more versatile long-term buy. If your kitchen is smaller or your cooking is simpler, the BOV845BSS is still a smart, capable choice.
Quick Decision Guide
Which Should You Buy?
Common Questions
Frequently Asked Questions
What is the main difference between the Breville BOV845BSS and BOV900BSS?
The main difference between the BOV845BSS and BOV900BSS is that the BOV900BSS adds air frying, dehydrating, and dough proofing along with a larger 1.0 cubic foot interior, while the BOV845BSS is a simpler 0.8 cubic foot convection oven built around ten core baking and toasting functions.
Can the BOV845BSS air fry food?
No, the BOV845BSS does not have a dedicated air fry setting. It relies on standard convection bake and roast, which crisps food but does not replicate the higher-velocity super convection air fry mode found on the BOV900BSS.
Is the BOV900BSS big enough for a whole turkey?
The BOV900BSS can hold a small turkey up to roughly 14 pounds, along with a 13-inch pizza or a 9-by-13-inch baking pan, thanks to its larger 1.0 cubic foot cavity.
Does the BOV845BSS have a slow cook setting?
Yes, the BOV845BSS includes a slow cook function that runs for up to ten hours before automatically switching to keep warm, the same slow cook setting carried over to the BOV900BSS.
Which model has more heating elements?
The BOV900BSS uses additional independent quartz elements compared to the BOV845BSS, giving Element iQ more zones to steer heat toward for tasks like air frying and dehydrating.
Is the BOV900BSS worth the extra cost over the BOV845BSS?
It depends on how you cook. If you want air frying, dehydrating, proofing, and a bigger cavity, the extra cost of the BOV900BSS is generally worthwhile. If you mainly toast, bake, and roast, the BOV845BSS covers those needs for less.
Do both ovens fit under a standard kitchen cabinet?
Both models are designed as freestanding countertop ovens with vented housings, so manufacturer clearance guidelines should be followed above and behind the unit rather than installing either flush under a cabinet.
Which oven preheats faster, the BOV845BSS or the BOV900BSS?
Both share the same 1800-watt output, so preheat speed is close between them, though the BOV900BSS's additional elements and super convection fan can bring larger loads up to temperature slightly more evenly.
Can I bake a full 9-by-13-inch pan in the BOV845BSS?
The BOV845BSS's 0.8 cubic foot interior is better suited to smaller pans and trays, and it can be tight for a full 9-by-13-inch pan, while the roomier BOV900BSS is specifically sized to accommodate that pan size.
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