Our take
Commercial Chef CHM660B is the black 0.6-cu.-ft. member of the CHM660B/CHM660W pair. The manufacturer support article distinguishes CHM660B (Black) from CHM660W (White), and the user manual lists CHM660B, CHM660B6C, CHM660W, and CHM660W6C on its cover. The frozen Amazon title's Renewed wording refers to the condition of the historical offer; it does not change the oven model. The manual states 600 W microwave output and 850 W consumption separately, with a 120-V/60-Hz supply, 0.6-cu.-ft. cavity, six mechanical power levels, and a dial timer. It marks the oven HOUSEHOLD USE ONLY. There is a dimension discrepancy: Commercial Chef's support article gives 17.75 × 12.5 × 10.25 in. (W×D×H), while the shared manual lists 17 13/16 × 13 5/8 × 10 5/16 in. (W×D×H). Confirm the actual label or unit before making a tight-fit decision. The glass tray diameter, sensor feature, optional trim kit, and exact current ASIN are not established. This review is based on manufacturer support material and the manual text, without personal-use or current-market claims.
A very compact, black, household Commercial Chef model with straightforward mechanical dials and a 30-minute timer, suited to buyers who prefer simple manual controls and have room for the specified airflow gaps..
Choose a larger or better-documented model if you need more than 0.6 cu. ft., more than 600 W output, sensor programming, a known tray diameter, a built-in trim kit, or foodservice-rated equipment.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The manual specifies 0.6 cu. ft. and 600 W microwave output, distinct from its 850 W power input.
- Mechanical controls keep the operation direct: six power levels and a 30-minute timer with an end signal.
- The manual distinguishes black B and white W variants and supplies household clearances, electrical guidance, and a household-use-only label.
What to weigh up
- The small cavity and 600 W output put it at the compact end of the covered microwave roster.
- The support article and manual report different outside depth/height measurements, and neither the exact tray diameter nor an optional trim kit is documented.
- Sensor cooking is not established, and historical ASIN B08H8X4TC1 does not prove a current exact-model renewed offer.
The key details
| Model covered | CHM660B |
|---|---|
| Capacity | 0.6 cu. ft. capacity and 600 W microwave output; manual input is 850 W at 120 V/60 Hz |
| Microwave output | CHM660B is black and CHM660W is white; the manual covers B/B6C and W/W6C model suffixes |
| Cooking approach | Mechanical dial power selector has six levels; the timer dial runs up to 30 minutes and rings at completion |
| Installation options | Manual lists a glass tray and roller support without its diameter; exact turntable size remains unknown |
| Finish and turntable | Household-use-only label, separate-circuit recommendation, and open clearances of 8 in. overhead, 4 in. rear, and 2 in. at each side |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
Separate model color from the old renewed offer
The official Commercial Chef article identifies two base variants: CHM660B in black and CHM660W in white. The attached manual names those codes along with CHM660B6C and CHM660W6C. This row's source title specifies CHM660B and appends Amazon Renewed, so the included oven model remains the black B variant; Renewed describes the recorded offer condition. Do not swap in specifications for the white W model or treat B6C as a new color. The historical ASIN B08H8X4TC1 was not readable as proof of an exact current offer. A tagged search by Commercial Chef CHM660B keeps the variant explicit; confirm condition, included parts, and return terms on any offer considered.
A small cavity with input separated from output
The shared model manual specifies 0.6 cubic feet, 600 W microwave output, and 850 W power consumption. The support article also lists 600 watts of power for the exact B/W pair. Use the manual's MWO output number for a cooking-power threshold rather than the larger consumption value. A 0.6-cu.-ft. oven gives less room for wide casserole dishes than the 0.9- or 1.1-cu.-ft. products elsewhere in the roster; measure the vessel you use most often and compare it with the listed cavity dimensions. No personal heating result can be inferred from rated watts alone. The support page and manual disagree about body depth, so also check the physical appliance if it must slide into a close counter opening.
Manual dials and a basic timer
This model uses mechanical dial controls rather than a digital keypad. The manual describes six power levels—Low, Defrost, Medium Low, Medium, Medium High, and High—and a timer dial that runs up to 30 minutes. A bell signals the end of the cycle. Defrosting uses the Defrost or Medium Low power setting with a user-set time; the manual does not describe automatic weight sensing or a sensor-cook routine. The support article separately names a grip handle and child-safety lock. This makes the interface easy to understand from the written controls, but it offers fewer named automatic menu paths than digital Commercial Chef models such as CHM770W or CHM990W. SensorCooking remains unknown because the exact product documents reviewed do not explicitly classify sensor capability.
Resolve the exterior measurement conflict before fitting
Commercial Chef's support article gives unit measurements of 17.75 inches wide, 12.5 inches deep, and 10.25 inches high. The manual covering CHM660B/B6C and CHM660W/W6C specifies 17 13/16 inches wide, 13 5/8 inches deep, and 10 5/16 inches high. The width is close, but the depth differs by more than an inch and the height is not identical. I preserve the discrepancy rather than choosing whichever value fits a proposed opening. The manual calls for an 8-inch overhead gap, 4 inches at the back, and 2 inches on both sides. It also identifies a glass tray and roller support without a diameter. Check your individual oven and available counter space, and leave tray diameter unknown instead of borrowing a number from an unrelated model or unverified listing.
Household classification overrides the brand name
The Commercial Chef manual marks the oven HOUSEHOLD USE ONLY. Its warranty section also excludes use in a commercial or rental setting. This supports commercialDuty=false despite the brand name. The electrical instructions call for 120 V/60 Hz AC, a 20-A supply, and recommend a separate circuit serving only the oven. No exact source documents an optional built-in trim kit; although the manual gives countertop clearances, that does not prove an available kit or conclusively rule one out. A buyer comparing kitchen or rental use should follow the printed household limitation and the stated ventilation directions rather than infer foodservice rating from the word Commercial.
What else to compare
If you want a slightly larger cavity and more output while keeping a digital interface, Commercial Chef CHM770W is a separate 0.7-cu.-ft./700-W white model with named quick-cook keys. CHM990W is another model with 0.9 cu. ft. and 900 W. CHM660B is smaller at 0.6 cu. ft./600 W and uses manual dials; it should be chosen for that compact size and simple interface, not under an assumption that the related models share its controls or measurements.
Before you buy
What capacity and output does the CHM660B manual specify?
It gives 0.6 cu. ft. and 600 W microwave output, separately from 850 W power consumption.
Is CHM660B the white model?
No. Commercial Chef identifies CHM660B as black and CHM660W as white; the B6C/W6C codes are additional manual-covered variants.
What controls does it have?
Mechanical power and timer dials, six power levels, up to a 30-minute timer, end bell, grip handle, and child-safety lock.
Which outside depth should I use?
The support article says 12.5 in. and the manual says 13 5/8 in. Measure the actual unit before planning a close fit.
Is it suitable for commercial foodservice?
No. The manual labels it HOUSEHOLD USE ONLY and excludes commercial or rental settings in the warranty terms.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Commercial Chef CHM660B/CHM660W model support article and linked four-variant instruction manual ↗ — checked October 4, 2026.
- Commercial Chef support article: exact black CHM660B/white CHM660W identities, capacity, 600 W, six dial levels, 30-minute timer, end signal, handle, child lock, and article dimensions ↗ — checked October 4, 2026.
- Commercial Chef instruction-manual article identifying the shared CHM660B/CHM660W manual ↗ — checked October 4, 2026.
- Readable mirror of the Commercial Chef-authored manual, whose cover names CHM660B/B6C and CHM660W/W6C; used for 600 W output, 850 W input, capacity, household-use-only label, clearances, controls, and the conflicting manual dimensions ↗ — checked October 4, 2026.
- Historical Amazon Renewed ASIN lookup; exact current CHM660B/condition mapping was not verified ↗Paid link · We may earn a commission. — checked October 4, 2026.
The decision
Choose CHM660B if a black 0.6-cu.-ft. household microwave with 600-W output and six mechanical power settings fits your needs. Follow the manual's 8-in. overhead, 4-in. rear, and 2-in. side clearances, and plan for a grounded 120-V/60-Hz/20-A circuit. Resolve the article/manual dimension discrepancy by measuring the specific unit. Sensor cooking, tray diameter, and trim-kit support remain unknown; ASIN B08H8X4TC1 is not verified as a current exact-model offer.
Is it the right fit?
Check the exact model and today’s offers on Amazon.