Our take in 30 seconds
Best for: mild climates or homes with backup heatStrengths
- Also sold under 2 other badges, so you can compare more quotes for the same unit
Good to know
- Only 45% of its heat output remains at 5°F; plan on backup heat in hard freezes
- Heating efficiency (HSPF2 7.8) is in the lower third of models
- Single-stage compressor runs on/off at full power, so it is less smooth than inverter models
Running-cost calculator
Pre-filled with EIA prices · edit any fieldUses the base certified SEER2 (15.2) and HSPF2 (7.8). 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 Goodman GSZH501810A* at the three ENERGY STAR test temperatures (cooling capacity is 17,600 BTU/h for reference).
Retention at 17°F: 57% · at 5°F: 45%. Learn how to use these numbers in our cold-climate guide.
Estimated running cost in every state
Same unit, very different bills: from about $499 a year in Louisiana to $2,011 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¢ | $201 | $298 | $499 |
| Florida | 14.99¢ | $150 | $417 | $567 |
| Mississippi | 14.43¢ | $290 | $301 | $590 |
| Nevada | 12.72¢ | $341 | $265 | $606 |
| Washington | 14.63¢ | $555 | $59 | $614 |
| Arizona | 15.05¢ | $235 | $383 | $618 |
| Tennessee | 13.42¢ | $419 | $202 | $621 |
| Oregon | 15.92¢ | $568 | $83 | $651 |
| North Carolina | 14.95¢ | $434 | $225 | $659 |
| Arkansas | 14.37¢ | $417 | $250 | $666 |
| Kentucky | 13.80¢ | $493 | $176 | $668 |
| South Carolina | 15.76¢ | $387 | $292 | $679 |
| Georgia | 15.90¢ | $390 | $295 | $685 |
| Texas | 15.91¢ | $319 | $368 | $688 |
| Utah | 13.31¢ | $564 | $139 | $703 |
| Alabama | 16.33¢ | $401 | $303 | $703 |
| Oklahoma | 14.82¢ | $463 | $257 | $720 |
| Idaho | 13.37¢ | $626 | $108 | $735 |
| New Mexico | 16.51¢ | $552 | $191 | $744 |
| Nebraska | 13.54¢ | $634 | $141 | $775 |
| West Virginia | 16.31¢ | $655 | $151 | $806 |
| Missouri | 16.02¢ | $608 | $204 | $812 |
| Virginia | 17.64¢ | $590 | $225 | $815 |
| Kansas | 15.47¢ | $621 | $197 | $818 |
| Wyoming | 14.43¢ | $805 | $84 | $888 |
| Colorado | 17.17¢ | $766 | $139 | $905 |
| Delaware | 18.70¢ | $709 | $217 | $926 |
| Indiana | 17.02¢ | $759 | $168 | $927 |
| North Dakota | 13.31¢ | $861 | $69 | $930 |
| California | 29.75¢ | $597 | $344 | $942 |
| Montana | 15.57¢ | $868 | $81 | $949 |
| South Dakota | 15.15¢ | $845 | $114 | $959 |
| Iowa | 17.06¢ | $875 | $148 | $1,023 |
| Ohio | 19.38¢ | $865 | $180 | $1,044 |
| Maryland | 21.40¢ | $812 | $248 | $1,059 |
| Illinois | 19.32¢ | $905 | $179 | $1,084 |
| Minnesota | 17.20¢ | $1,036 | $110 | $1,146 |
| Pennsylvania | 21.77¢ | $971 | $202 | $1,173 |
| Wisconsin | 19.41¢ | $1,082 | $135 | $1,217 |
| New Jersey | 24.61¢ | $988 | $256 | $1,245 |
| District of Columbia | 25.98¢ | $927 | $331 | $1,258 |
| Connecticut | 24.51¢ | $1,203 | $184 | $1,387 |
| Michigan | 22.99¢ | $1,231 | $160 | $1,391 |
| Hawaii | 47.18¢ | $53 | $1,420 | $1,473 |
| Vermont | 23.84¢ | $1,383 | $124 | $1,507 |
| Rhode Island | 28.18¢ | $1,383 | $196 | $1,579 |
| New York | 28.65¢ | $1,406 | $216 | $1,622 |
| New Hampshire | 27.64¢ | $1,541 | $160 | $1,701 |
| Massachusetts | 30.48¢ | $1,564 | $212 | $1,776 |
| Alaska | 29.41¢ | $1,968 | $34 | $2,002 |
| Maine | 32.11¢ | $1,862 | $149 | $2,011 |
Same equipment sold under other brands
These listings share the same certifying manufacturer (Daikin Comfort Technologies Manufacturing, L.P.) 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.
- Amana ASZH501810A*
- Daikin DZ5SEA1810A*
Similar-size alternatives
Other ducted split system units within ±15% of this model's cooling capacity, sorted by efficiency. Cost difference is versus the Goodman GSZH501810A* at U.S.-average rates.
| Model | Cooling BTU/h | SEER2 | HSPF2 | 5°F kept | Est. yearly cost | |
|---|---|---|---|---|---|---|
| Midea MO1HE-H18B-2A | 18,000 | 15.2–19.3 | 10.8 | 103% | $748 (−$132) | Compare |
| LG KUSXB181A | 18,000 | 15.2–17.5 | 10 | 110% | $818 (−$62) | Compare |
| Panasonic CU-HM18BAHU | 18,000 | 15.2–19 | 9.7 | 95% | $806 (−$74) | Compare |
| Day & Night D5CUHAH18AAK+KSAIC0701230 | 18,700 | 15.2–16.5 | 9 | 87% | $898 (+$18) | Compare |
| Daikin DH6VSA1810A* | 17,100 | 16–19 | 8.8 | 75% | $788 (−$91) | Compare |
| Lennox EL17XP1-018-230A** | 18,000 | 15.2–16.8 | 8.5 | 54% | $852 (−$28) | Compare |
Full specifications
| Brand | Goodman |
| Outdoor model | GSZH501810A* |
| Certified by | Daikin Comfort Technologies Manufacturing, L.P. |
| Product type | Ducted split system |
| Compressor | Single-stage |
| Refrigerant | R-410A |
| Cooling capacity | 17,600 BTU/h |
| Nominal size | 1.5 tons |
| SEER2 (certified range) | 15.2 – 15.2 |
| EER2 (best) | 12.5 |
| HSPF2 (best) | 7.8 |
| Heating capacity @ 47°F | 17,400 BTU/h |
| Heating capacity @ 17°F | 10,000 BTU/h |
| Heating capacity @ 5°F | 7,800 BTU/h |
| COP @ 5°F | 1.8 |
| ENERGY STAR cold-climate | No |
| Certified indoor pairings | 6 |
| 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 Goodman GSZH501810A* 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 $879 per year ($648 heating, $231 cooling). It ranges from about $499 in Louisiana to $2,011 in Maine.
Does the Goodman GSZH501810A* work in cold weather?
It is not ENERGY STAR cold-climate certified. It delivers 7,800 BTU/h at 5°F (45% of its 47°F capacity), so in very cold climates expect more reliance on backup heat.
What size is the Goodman GSZH501810A*?
It is rated at 17,600 BTU/h of cooling, roughly 1.5 tons, and 17,400 BTU/h of heating at 47°F. Proper sizing should be confirmed with a Manual J load calculation.
Is the Goodman GSZH501810A* the same as the Amana ASZH501810A*?
Very likely. Both are certified by Daikin Comfort Technologies Manufacturing, L.P. with identical capacities and efficiency ratings in the ENERGY STAR database, which indicates the same equipment sold under different brands.