"Heat level" (or "steam level") describes how much on-page intimacy a romance contains. It says nothing about quality or emotional intensity — a closed-door romance can be devastating, an explicit one tender. It just helps readers find what they're comfortable with.
The usual five-step scale
| Level | Common names | What's on the page |
|---|---|---|
| 1 | Sweet, clean, closed door | Kissing at most; no sex scenes |
| 2 | Mild, fade to black | Intimacy implied; the scene cuts away |
| 3 | Steamy, open door | Sex scenes on page, not overly graphic |
| 4 | Spicy, explicit | Detailed, frequent sex scenes |
| 5 | Erotic romance | Sexuality is central to the story and the relationship arc |
Retailers, review sites and publishers use their own variants — flames, chili peppers, numbers — but they map onto this scale.
"Closed door" and "open door"
A closed-door romance shuts the bedroom door on the reader; an open-door romance invites them in. "Fade to black" sits between the two. Many historical, cosy and young-adult romances are closed door; most contemporary M/M and paranormal romance is open door.
Heat level isn't the same as content warnings
Heat level covers consensual intimacy. Content warnings (or "content notes") cover difficult themes such as violence, abuse, grief or self-harm. Many authors now list them at the front of the book or on their websites.
Finding the right heat
- Check the publisher's imprint — some imprints are explicitly sweet or explicitly erotic.
- Read the blurb's language: "sizzling", "scorching" and "steamy" usually mean open door.
- Look for the heat level in reviews and reader databases.
- Use the "Look inside" or sample chapter.
Related: romance tropes, M/M romance guide, romance reader glossary.