Breville BOV845BSS vs BOV900BSS: Which One Belongs on Your Counter?
Breville's BOV845BSS Smart Oven Pro and BOV900BSS Smart Oven Air Fryer Pro both run on the same Element iQ heating philosophy, but they're built for different kitchens. One keeps things focused with ten dependable presets in a compact cavity. The other stretches into air frying, dehydrating, and dough proofing, backed by a roomier interior.
The main difference between the Breville BOV845BSS and BOV900BSS is scope: the BOV900BSS adds air fry, dehydrate, and proof settings along with roughly 25% more interior room, while the BOV845BSS stays focused on toasting, baking, roasting, broiling, and slow cooking in a smaller footprint.
Below we walk through full specifications, smart technology, capacity, build quality, and real-world cooking performance for both models, so you can match the right oven to how you actually cook.
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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 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 cut down on 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's 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 roomier 1.0 cubic foot interior, while the BOV845BSS sticks to ten core toasting, baking, and roasting functions in a smaller 0.8 cubic foot cavity.
Does the BOV845BSS have an air fry setting?
No. The BOV845BSS uses standard convection for baking and roasting, but it does not include a dedicated air fry mode. That higher-velocity super convection air fry setting is exclusive to the BOV900BSS.
How much bigger is the BOV900BSS than the BOV845BSS?
The BOV900BSS holds about 1.0 cubic foot compared to the BOV845BSS's 0.8 cubic foot, which translates to fitting a full 13-inch pizza, a 9-by-13-inch pan, or a small turkey rather than smaller personal-size portions.
Can either oven slow cook?
Yes, both the BOV845BSS and the BOV900BSS include a slow cook setting that runs for up to ten hours before automatically switching to keep warm.
Which model has a dough proofing function?
Only the BOV900BSS includes a dedicated proof setting for rising bread dough at a controlled low temperature; the BOV845BSS does not offer this function.
Is the BOV900BSS worth paying more for?
If air frying, dehydrating, proofing, or cooking larger batches matters to you, the added cost of the BOV900BSS is generally justified. If you mainly toast, bake, and roast smaller portions, the BOV845BSS delivers similar core performance for less.
Do both models use the same wattage?
Yes, both the BOV845BSS and the BOV900BSS run on 1800 watts, though the BOV900BSS distributes that power across additional independent quartz elements.
Which oven takes up less counter space?
The BOV845BSS has a smaller exterior footprint than the BOV900BSS, making it the better fit for kitchens with limited counter space.
Can the BOV900BSS dehydrate food?
Yes, the BOV900BSS includes a dedicated dehydrate setting that can run across multiple trays at once, a function the BOV845BSS does not have.
