Our take in 30 seconds
Best for: mild climates or homes with backup heatStrengths
- Also sold under 5 other badges, so you can compare more quotes for the same unit
Good to know
- Only 57% of its heat output remains at 5°F; plan on backup heat in hard freezes
- Heating efficiency (HSPF2 8.1) is in the lower third of models
- Uses R-410A, a refrigerant being phased down; future service may cost more
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (15.2) and HSPF2 (8.1). 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 Luxaire THF2B36T21 at the three ENERGY STAR test temperatures (cooling capacity is 36,000 BTU/h for reference).
Retention at 17°F: 68% · at 5°F: 57%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $997 a year in Louisiana to $3,891 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¢ | $387 | $610 | $997 |
| Florida | 14.99¢ | $290 | $852 | $1,142 |
| Mississippi | 14.43¢ | $558 | $615 | $1,173 |
| Washington | 14.63¢ | $1,069 | $121 | $1,190 |
| Nevada | 12.72¢ | $656 | $542 | $1,198 |
| Tennessee | 13.42¢ | $807 | $413 | $1,220 |
| Arizona | 15.05¢ | $453 | $784 | $1,237 |
| Oregon | 15.92¢ | $1,094 | $170 | $1,264 |
| North Carolina | 14.95¢ | $835 | $460 | $1,295 |
| Kentucky | 13.80¢ | $949 | $360 | $1,308 |
| Arkansas | 14.37¢ | $803 | $511 | $1,313 |
| South Carolina | 15.76¢ | $745 | $597 | $1,342 |
| Georgia | 15.90¢ | $751 | $603 | $1,354 |
| Texas | 15.91¢ | $615 | $754 | $1,369 |
| Utah | 13.31¢ | $1,086 | $284 | $1,370 |
| Alabama | 16.33¢ | $772 | $619 | $1,391 |
| Oklahoma | 14.82¢ | $891 | $526 | $1,418 |
| Idaho | 13.37¢ | $1,206 | $222 | $1,428 |
| New Mexico | 16.51¢ | $1,064 | $391 | $1,455 |
| Nebraska | 13.54¢ | $1,222 | $289 | $1,510 |
| West Virginia | 16.31¢ | $1,261 | $309 | $1,570 |
| Missouri | 16.02¢ | $1,170 | $417 | $1,587 |
| Virginia | 17.64¢ | $1,137 | $460 | $1,596 |
| Kansas | 15.47¢ | $1,196 | $403 | $1,599 |
| Wyoming | 14.43¢ | $1,550 | $171 | $1,721 |
| Colorado | 17.17¢ | $1,475 | $285 | $1,760 |
| North Dakota | 13.31¢ | $1,658 | $142 | $1,800 |
| Indiana | 17.02¢ | $1,462 | $343 | $1,805 |
| Delaware | 18.70¢ | $1,366 | $443 | $1,809 |
| Montana | 15.57¢ | $1,672 | $166 | $1,838 |
| California | 29.75¢ | $1,150 | $705 | $1,855 |
| South Dakota | 15.15¢ | $1,627 | $233 | $1,860 |
| Iowa | 17.06¢ | $1,686 | $303 | $1,989 |
| Ohio | 19.38¢ | $1,665 | $367 | $2,032 |
| Maryland | 21.40¢ | $1,563 | $507 | $2,070 |
| Illinois | 19.32¢ | $1,743 | $366 | $2,109 |
| Minnesota | 17.20¢ | $1,995 | $224 | $2,219 |
| Pennsylvania | 21.77¢ | $1,871 | $412 | $2,283 |
| Wisconsin | 19.41¢ | $2,085 | $276 | $2,361 |
| New Jersey | 24.61¢ | $1,903 | $525 | $2,428 |
| District of Columbia | 25.98¢ | $1,786 | $677 | $2,463 |
| Connecticut | 24.51¢ | $2,317 | $377 | $2,694 |
| Michigan | 22.99¢ | $2,371 | $327 | $2,697 |
| Vermont | 23.84¢ | $2,663 | $254 | $2,917 |
| Hawaii | 47.18¢ | $101 | $2,905 | $3,007 |
| Rhode Island | 28.18¢ | $2,664 | $400 | $3,064 |
| New York | 28.65¢ | $2,708 | $441 | $3,149 |
| New Hampshire | 27.64¢ | $2,969 | $327 | $3,296 |
| Massachusetts | 30.48¢ | $3,012 | $433 | $3,445 |
| Alaska | 29.41¢ | $3,791 | $70 | $3,860 |
| Maine | 32.11¢ | $3,587 | $304 | $3,891 |
Same equipment sold under other brands
These listings share the same certifying manufacturer (Johnson Controls, Inc.) and identical certified capacities and efficiency ratings, so they are almost certainly the same hardware with a different badge. If you get quotes for any of them, you are comparing installation price and warranty, not equipment. How rebadging works.
- Champion THF2B36T21
- Coleman THF2B36T21
- Fraser-Johnston THF2B36T21
- Johnson Controls THF2B36T21
Plus 1 more identical listing in the ENERGY STAR database.
Similar-size alternatives
Other ducted split system units within ±15% of this model's cooling capacity, sorted by efficiency. Cost difference is versus the Luxaire THF2B36T21 at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Ruud UP19AY36AJVC | 34,200 | 19–21 | 10 | 87% | $1,353 (−$368) | Compare |
| Bryant 37MUHAQ36AA3 | 36,000 | 15.8–18 | 10.3 | 103% | $1,527 (−$194) | Compare |
| Daikin DH9VSA361CA* | 34,200 | 16.9–21 | 10 | 100% | $1,398 (−$323) | Compare |
| Panasonic CU-HM36BAHU | 36,000 | 15.6–17.4 | 10.3 | 103% | $1,533 (−$188) | Compare |
| MrCool CENTRAL-36-HP-C-230B00-O | 36,000 | 15.2–17.4 | 10.3 | 103% | $1,545 (−$176) | Compare |
| Midea MO1SE-H36B-2A | 36,000 | 15.2–18 | 10.3 | 103% | $1,545 (−$176) | Compare |
Full specifications
| Brand | Luxaire |
| Outdoor model | THF2B36T21 |
| Certified by | Johnson Controls, Inc. |
| Product type | Ducted split system |
| Compressor | Two-stage |
| Refrigerant | R-410A |
| Cooling capacity | 36,000 BTU/h |
| Nominal size | 3 tons |
| SEER2 (certified range) | 15.2 – 16 |
| EER2 (best) | 12 |
| HSPF2 (best) | 8.1 |
| Heating capacity @ 47°F | 34,800 BTU/h |
| Heating capacity @ 17°F | 23,800 BTU/h |
| Heating capacity @ 5°F | 20,000 BTU/h |
| COP @ 5°F | 2.44 |
| ENERGY STAR cold-climate | No |
| Certified indoor pairings | 224 |
| Latest certification | 2026-07 |
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 Luxaire THF2B36T21 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 $1,721 per year ($1,248 heating, $473 cooling). It ranges from about $997 in Louisiana to $3,891 in Maine.
Does the Luxaire THF2B36T21 work in cold weather?
It is not ENERGY STAR cold-climate certified. It delivers 20,000 BTU/h at 5°F (57% of its 47°F capacity), so in very cold climates expect more reliance on backup heat.
What size is the Luxaire THF2B36T21?
It is rated at 36,000 BTU/h of cooling, roughly 3 tons, and 34,800 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.
Is the Luxaire THF2B36T21 the same as the Champion THF2B36T21?
Very likely. Both are certified by Johnson Controls, Inc. with identical capacities and efficiency ratings in the ENERGY STAR database, which indicates the same equipment sold under different brands.