Thanks for the Wordplay

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Across
  1. 2. A plumber's conduit, akin to the way communication is key in love.
  2. 7. Essential for HVAC systems and keeping a cool head in love.
  3. 8. It sets the temperature at home, like understanding does in a warm relationship.
  4. 9. Controls flow in pipes, as trust does in relationships.
  5. 10. The core of our home's comfort, much like love in a relationship.
Down
  1. 1. A complete path for electrical flow, much like the journey of a lasting romance.
  2. 3. Paths for air, like the channels through which affection flows.
  3. 4. Electricians lay it to connect, as love does between hearts.
  4. 5. A plumber's success and sometimes how you feel after a compliment.
  5. 6. What electricians connect, like two hearts in love.
  6. 7. Electrician's concern, or the energy between two people in love.
  7. 9. A spark of electricity, or a spark of romance.