| Model | Height (in.) | Width (in.) | Capacity (BTU/Hr) |
| HW06061 | 6 | 6 | 2,785 |
| HW06062 | 6 | 6 | 7,339 |
| HW06091 | 6 | 9 | 4,913 |
| HW06092 | 6 | 9 | 11,855 |
| HW06121 | 6 | 12 | 7,133 |
| HW06122 | 6 | 12 | 16,451 |
| HW06151 | 6 | 15 | 9,398 |
| HW06152 | 6 | 15 | 21,078 |
| HW06181 | 6 | 18 | 11,689 |
| HW06182 | 6 | 18 | 25,726 |
| HW09091 | 9 | 9 | 8,261 |
| HW09092 | 9 | 9 | 18,761 |
| HW09121 | 9 | 12 | 11,689 |
| HW09122 | 9 | 12 | 25,726 |
| HW09151 | 9 | 15 | 15,149 |
| HW09152 | 9 | 15 | 30,596 |
| HW09181 | 9 | 18 | 18,644 |
| HW09182 | 9 | 18 | 35,588 |
| HW12121 | 12 | 12 | 14,267 |
| HW12122 | 12 | 12 | 32,901 |
| HW12151 | 12 | 15 | 18,795 |
| HW12152 | 12 | 15 | 42,156 |
| HW12181 | 12 | 18 | 23,369 |
| HW12182 | 12 | 18 | 51,429 |
| HW12241 | 12 | 24 | 32,623 |
| HW12242 | 12 | 24 | 65,802 |
| HW12301 | 12 | 30 | 41,959 |
| HW12302 | 12 | 30 | 84,289 |
| HW12361 | 12 | 36 | 51,347 |
| HW12362 | 12 | 36 | 102,858 |
| HW15181 | 15 | 18 | 30,298 |
| HW15182 | 15 | 18 | 59,298 |
| HW15241 | 15 | 24 | 41,959 |
| HW15242 | 15 | 24 | 82,253 |
| HW15301 | 15 | 30 | 53,702 |
| HW15302 | 15 | 30 | 105,367 |
| HW15361 | 15 | 36 | 58,428 |
| HW15362 | 15 | 36 | 128,584 |
| HW18181 | 18 | 18 | 35,058 |
| HW18182 | 18 | 18 | 77,155 |
| HW18241 | 18 | 24 | 48,935 |
| HW18242 | 18 | 24 | 102,858 |
| HW18301 | 18 | 30 | 62,943 |
| HW18302 | 18 | 30 | 126,445 |
| HW18361 | 18 | 36 | 77,020 |
| HW18362 | 18 | 36 | 154,287 |
| HW18481 | 18 | 48 | 97,871 |
| HW18482 | 18 | 48 | 197,405 |
| HW21301 | 21 | 30 | 65,766 |
| HW21302 | 21 | 30 | 147,500 |
| HW21361 | 21 | 36 | 81,797 |
| HW21362 | 21 | 36 | 180,013 |
| HW21481 | 21 | 48 | 114,182 |
| HW21482 | 21 | 48 | 230,306 |
| HW24241 | 24 | 24 | 65,246 |
| HW24242 | 24 | 24 | 135,706 |
| HW24301 | 24 | 30 | 83,918 |
| HW24302 | 24 | 30 | 172,904 |
| HW24361 | 24 | 36 | 102,693 |
| HW24362 | 24 | 36 | 197,405 |
| HW24481 | 24 | 48 | 135,250 |
| HW24482 | 24 | 48 | 271,412 |