Our take in 30 seconds
Best for: mixed climates with occasional hard freezesStrengths
- Variable-speed compressor: quieter, steadier temperatures and better humidity control
- Uses newer, lower-impact R-454B refrigerant
Good to know
- No notable drawbacks in the certified data.
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (15.5) and HSPF2 (9). Assumes the unit is correctly sized. How we calculate.
Heating capacity as it gets colder
A heat pump's output falls as outdoor temperature drops. This is the certified heat output of the Bosch BOHA-60RTB-M18S at the three ENERGY STAR test temperatures (cooling capacity is 52,000 BTU/h for reference).
Retention at 17°F: 74% · at 5°F: 78%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $1,404 a year in Louisiana to $5,440 in Maine, driven by local electricity prices and how much heating or cooling the climate needs. Click a column to sort.
| State | Price | Heating | Cooling | Total / yr |
|---|---|---|---|---|
| Louisiana | 12.87¢ | $541 | $864 | $1,404 |
| Florida | 14.99¢ | $405 | $1,207 | $1,612 |
| Mississippi | 14.43¢ | $779 | $871 | $1,651 |
| Washington | 14.63¢ | $1,492 | $172 | $1,664 |
| Nevada | 12.72¢ | $916 | $768 | $1,684 |
| Tennessee | 13.42¢ | $1,127 | $585 | $1,713 |
| Arizona | 15.05¢ | $632 | $1,111 | $1,743 |
| Oregon | 15.92¢ | $1,528 | $240 | $1,769 |
| North Carolina | 14.95¢ | $1,166 | $652 | $1,818 |
| Kentucky | 13.80¢ | $1,325 | $509 | $1,834 |
| Arkansas | 14.37¢ | $1,121 | $723 | $1,844 |
| South Carolina | 15.76¢ | $1,040 | $846 | $1,886 |
| Georgia | 15.90¢ | $1,049 | $853 | $1,903 |
| Utah | 13.31¢ | $1,517 | $402 | $1,919 |
| Texas | 15.91¢ | $859 | $1,068 | $1,927 |
| Alabama | 16.33¢ | $1,078 | $877 | $1,954 |
| Oklahoma | 14.82¢ | $1,245 | $746 | $1,991 |
| Idaho | 13.37¢ | $1,685 | $314 | $1,999 |
| New Mexico | 16.51¢ | $1,486 | $554 | $2,040 |
| Nebraska | 13.54¢ | $1,706 | $409 | $2,115 |
| West Virginia | 16.31¢ | $1,761 | $438 | $2,199 |
| Missouri | 16.02¢ | $1,634 | $591 | $2,225 |
| Virginia | 17.64¢ | $1,588 | $651 | $2,239 |
| Kansas | 15.47¢ | $1,671 | $571 | $2,242 |
| Wyoming | 14.43¢ | $2,164 | $242 | $2,407 |
| Colorado | 17.17¢ | $2,060 | $403 | $2,464 |
| North Dakota | 13.31¢ | $2,316 | $201 | $2,517 |
| Indiana | 17.02¢ | $2,042 | $485 | $2,528 |
| Delaware | 18.70¢ | $1,907 | $627 | $2,535 |
| Montana | 15.57¢ | $2,336 | $235 | $2,571 |
| South Dakota | 15.15¢ | $2,272 | $330 | $2,603 |
| California | 29.75¢ | $1,606 | $998 | $2,605 |
| Iowa | 17.06¢ | $2,354 | $429 | $2,784 |
| Ohio | 19.38¢ | $2,326 | $520 | $2,846 |
| Maryland | 21.40¢ | $2,183 | $718 | $2,901 |
| Illinois | 19.32¢ | $2,434 | $519 | $2,953 |
| Minnesota | 17.20¢ | $2,786 | $317 | $3,104 |
| Pennsylvania | 21.77¢ | $2,612 | $584 | $3,197 |
| Wisconsin | 19.41¢ | $2,912 | $391 | $3,302 |
| New Jersey | 24.61¢ | $2,658 | $743 | $3,401 |
| District of Columbia | 25.98¢ | $2,494 | $959 | $3,453 |
| Connecticut | 24.51¢ | $3,235 | $534 | $3,770 |
| Michigan | 22.99¢ | $3,311 | $463 | $3,773 |
| Vermont | 23.84¢ | $3,719 | $360 | $4,079 |
| Hawaii | 47.18¢ | $142 | $4,115 | $4,257 |
| Rhode Island | 28.18¢ | $3,720 | $567 | $4,287 |
| New York | 28.65¢ | $3,782 | $625 | $4,407 |
| New Hampshire | 27.64¢ | $4,146 | $464 | $4,610 |
| Massachusetts | 30.48¢ | $4,206 | $614 | $4,820 |
| Alaska | 29.41¢ | $5,294 | $99 | $5,392 |
| Maine | 32.11¢ | $5,009 | $431 | $5,440 |
Similar-size alternatives
Other ducted split system units within ±15% of this model's cooling capacity, sorted by efficiency. Cost difference is versus the Bosch BOHA-60RTB-M18S at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Ruud UP19AY48AJVC | 45,500 | 18–19 | 10 | 92% | $1,827 (−$587) | Compare |
| Gree GUD60W2/NHE-D(U) | 53,000 | 16–19 | 10.5 | 100% | $2,156 (−$258) | Compare |
| Heil B5H3V48*K*AAA* | 46,500 | 20–23 | 9.5 | 76% | $1,963 (−$450) | Compare |
| Tempstar T5H3V48*K*AAA* | 46,500 | 19.5–23 | 9.5 | 72% | $2,113 (−$301) | Compare |
| Rheem RD18AY60AJVC | 52,000 | 16–18 | 10 | 66% | $2,393 (−$21) | Compare |
| Carrier 27VPA948A*030* | 49,500 | 15.2–19 | 10 | 75% | $2,249 (−$165) | Compare |
Full specifications
| Brand | Bosch |
| Outdoor model | BOHA-60RTB-M18S |
| Certified by | Bosch Thermotechnology Corporation |
| Product type | Ducted split system |
| Compressor | Variable-speed (inverter) |
| Refrigerant | R-454B |
| Cooling capacity | 52,000 BTU/h |
| Nominal size | 4.5 tons |
| SEER2 (certified range) | 15.5 – 17 |
| EER2 (best) | 10.2 |
| HSPF2 (best) | 9 |
| Heating capacity @ 47°F | 54,000 BTU/h |
| Heating capacity @ 17°F | 40,000 BTU/h |
| Heating capacity @ 5°F | 42,000 BTU/h |
| COP @ 5°F | 1.95 |
| ENERGY STAR cold-climate | Yes |
| Certified indoor pairings | 16 |
| Latest certification | 2026-04 |
Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), retrieved November 7, 2026. Capacities and HSPF2 are the highest values across certified pairings; confirm your exact system's AHRI reference number with your installer.
Frequently asked questions
How much does the Bosch BOHA-60RTB-M18S cost to run per year?
At the U.S. average residential electricity price of 18.16¢/kWh and typical national heating and cooling hours, we estimate about $2,414 per year ($1,743 heating, $670 cooling). It ranges from about $1,404 in Louisiana to $5,440 in Maine.
Does the Bosch BOHA-60RTB-M18S work in cold weather?
Yes. It is ENERGY STAR cold-climate certified and delivers 42,000 BTU/h at 5°F, 78% of its 47°F capacity, with a COP of 1.95 at 5°F.
What size is the Bosch BOHA-60RTB-M18S?
It is rated at 52,000 BTU/h of cooling, roughly 4.5 tons, and 54,000 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.