Richmond install requirements are identical to Rheem and Ruud for equivalent product types.
Essential / Encore / Premium atmospheric gas
- Existing B-vent chimney with proper draft
- Gas line: ½" up to 40k BTU / ¾" for 50k+ BTU
- Combustion air per code
- T&P discharge
- Drain pan with overflow when above living space
Encore Power Vent
- 120V outlet within 6 ft of unit
- PVC sidewall venting (2" or 3")
- Vent length per manual
- Termination clearances per code
Premium Power Direct Vent
- Two-pipe sealed combustion venting
- 120V outlet for inducer fan
- Vent up to 60 ft equivalent length
Essential / Encore electric
- 240V dedicated 30A circuit
- 10-gauge copper wire
- T&P discharge
- Drain pan when above living space
Encore Hybrid Heat Pump
- 240V dedicated 30A circuit
- 700+ cubic feet of unconditioned air space
- Ambient 40°F+ for heat pump mode
- Condensate drain — 4-8 gallons/day
- Clearances: 7" front, 4" sides, 7" top
Encore Tankless
- ¾" gas line back to meter for 199k BTU; ½" acceptable for RH130 up to 30 ft
- 2" or 3" PVC venting
- Condensate drain (1-2 gal/day)
- Water softener if hardness over 11 gpg
- Outdoor variant: no venting required
Permits
Required in most US jurisdictions.
Bottom line
Standard installs. Heat pump needs 700+ cu ft air space. Tankless needs ¾" gas line and proper venting.