Central heating unit (it's found in four themed answers)

Question:

Answer:

SUN

Length:

Similar Crossword Questions:

"Central" Ireland found in four puzzle answers
Things found in this puzzle's eight longest answers
Brewed drink (found in all four long answers)
Help found inside eight puzzle answers
Dream found in this puzzle's seven longest answers
Postseason gridiron game, and a hint to the puzzle theme found in starred answers
What the self-contradictory words found in this puzzle's theme answers are examples of
It includes a vest ... and what can be found in each set of circles in the long answers
Where the last words of the long answers may be found
Nerve, found in eight of the Across answers
This puzzle's theme found in the answers to five asterisked clues
Stocking stuffer found in seven of this puzzle's longest answers
Tools for ESP researchers (whose symbols are found at the ends of the answers to the five asterisked clues)
Commercial interruptions literally found in this puzzle's three other longest answers
Cyclist Armstrong, or what completes the ensemble found in the four long across answers
'Old MacDonald' sequence found in this puzzle's 10 longest answers
Author of the 1974 novel found in the starts of the starred answers
Central Park unit
Filing option, or what can be found in four long answers?
Cryptographers' successes (and what can be found in the circles in this puzzle's long answers)
Computer port found in the four longest answers
They're found at the ends of this puzzle's three other longest answers
Repeated by rote ... or a word that's mixed up in three themed answers
Puzzle honoree found in eight long answers
Internet interjection found in two theme answers