Ruud manuals are hosted on ruud.com (operates under Rheem corporate). Printed manuals ship with new units.
Where to download
- ruud.com — search by model number; download Installation & Operation Manual + Owner Manual
- rheem.com — Rheem hosts many Ruud documents under cross-reference
- Ruud support: 1-800-621-5622 emails manuals within hours
Documents by line
- Professional Classic — model-specific manuals (PROG/PROE series)
- Professional Achiever / Plus — similar manual to Classic with extended-warranty notes
- Professional Ultra — premium tier with enhanced installation notes
- Power Vent — venting + electrical sections emphasized
- Professional Hybrid — extensive heat pump install manual (air space, condensate requirements)
- Ultra Series Tankless — separate installation manuals for RU130/RU160/RU180/RU199 + indoor/outdoor variants
Bottom line
Always use the model-specific manual. For Ultra Tankless, the descaling instructions in the manual are mandatory reference for warranty defense.