Where the Ruud PROG50-40N RU62 fits
The PROG50-40N RU62 provides 48 gallons of rated storage in a nominal 50-gallon tall natural gas heater. Its 40,000-BTU/h input produces a listed recovery rate of 40.4 gallons per hour at a 90°F rise. It is one of two standard tall 50-gallon natural gas choices, with different dimensions and first-hour ratings.
The photograph is Ruud’s representative tall Atmospheric family image. It shows the standard side-T&P arrangement; the exact dimensions and burner rating come from the model row below.
PROG50-40N RU62 specifications
| Exact model | PROG50-40N RU62 |
|---|---|
| Fuel and venting | Natural Gas; atmospheric natural draft |
| Nominal capacity / rated storage | 50 gallons / 48 gallons |
| Gas input | 40,000 BTU/h |
| First-hour rating | 76 gallons |
| Recovery | 40.4 gallons per hour at a 90°F temperature rise |
| Uniform Energy Factor | 0.65 |
| A — height to vent | 62½ inches |
| B — tank height | 59¼ inches |
| C — tank diameter | 21½ inches |
| D — height to gas connection | 14½ inches |
| E — listed vent size | 3 or 4 inches; final vent sizing requires installation review |
| F — water-connection centers | 8 inches |
| G — height to side T&P valve | 52½ inches |
| H — water-connection size | ¾ inch |
| Shipping weight | 165 lb; not filled operating weight |
| Base limited warranty | 6-year tank and parts; eligibility and exclusions apply |
Hot-water demand and comparable models
The PROG50-38N RU60 has a lower 38,000-BTU input but a higher listed first-hour rating: 85 gallons versus 76 for this model. Both have 48 gallons of rated storage. The RU60 body is also narrower and lower at the vent. This RU62 model lists 0.65 UEF and 40.4-GPH recovery, compared with 0.64 and 38.4 GPH for RU60. No single one of those figures establishes the best choice for every home.
First-hour rating combines stored hot water and recovery under a standardized test. It is not a promise of continuous delivery at that rate. Tell us about back-to-back showers, tub filling and appliances used at the same time so we can compare the heater with your actual peak demand. Incoming water temperature and fixture flow also affect the result.
Fit, gas supply and atmospheric venting
At 21½ inches in diameter, this tank is wider than the standard 40-gallon natural gas models in the group. Check the pan, doorway and nearby equipment as well as the space around the existing heater. Its 62½-inch height to the vent is a separate measurement from the 59¼-inch tank height.
Order the factory natural gas version and verify that fuel on the delivered rating plate. A propane heater is a separate configuration, even when its tank looks similar. WHE checks the available gas supply against the selected input and the other appliances; the manual prohibits changing the heater to another fuel.
This atmospheric heater uses natural draft through a suitable vent system. WHE checks the draft hood, connector, complete vent route, combustion-air supply and any shared appliances. The sheet’s “3 or 4 inches” entry is not a stand-alone instruction to pick either pipe size. A power-vent or direct-vent installation needs a separate suitability review.
This guide covers the standard side-T&P model with top water connections. It does not specify the separate TT top-relief-valve or AX side-water-connection version. We plan the relief discharge, shutoffs, thermal-expansion provisions and any pan or drainage work around the actual installation.
Care, features and warranty
The family includes Ruud’s Guardian combustion shut-off system, a low-NOx burner, an anode rod and a brass drain valve. “Low NOx” does not mean ultra-low NOx, and the combustion shut-off feature is not a water-leak shutoff. Keep the air openings and service areas accessible and follow the supplied maintenance instructions. Sediment-control features do not eliminate maintenance.
Ruud lists a six-year limited tank and parts warranty. The linked residential certificate distinguishes eligible single-family use from other installations and excludes labor and reinstallation costs. Keep the purchase record, model and serial number. ProtectionPlus is an optional tank-warranty extension; it is not included base coverage or an automatic extension of parts and labor. Confirm the certificate supplied with the unit.
Which manufacturer figures this guide uses
Specifications here follow Ruud’s October 2025 sheet, RU-PROA-ATM-SS-10.25. The family web table still uses an older Energy Factor column. Those EF figures are not interchangeable with the UEF values in the current sheet. Confirm the delivered rating plate, EnergyGuide and supplied instructions before installation.
Frequently asked questions
Is the 40,000-BTU model always better than the 38,000-BTU 50-gallon model?
Not automatically. PROG50-40N RU62 has higher listed recovery and slightly higher UEF, while PROG50-38N RU60 has a higher first-hour rating and a smaller body. WHE compares the draw pattern and available installation space before selecting between them.
Is PROG50-40N RU62 natural gas or propane?
This exact model is natural gas, with 40,000 BTU/h input. For the other fuel, compare Ruud PROG50-36P RU62 as a separate selection. Do not assume equal dimensions or performance, and do not convert this heater to another fuel.
Does a 50-gallon label mean 50 gallons of rated storage?
No. Ruud lists 50 gallons nominal and 48 gallons rated storage for this model. Its 76-gallon first-hour rating is a separate performance measure that includes recovery during testing.
How much height does this tall model need?
The tank itself is 59¼ inches high; the drawing lists 62½ inches to the vent. The installation also needs space for venting, water piping and service. Those dimensions alone do not establish the required enclosure height or clearances.
Can WHE quote a replacement from photos?
Clear photos of the data plate, entire heater, vent, gas connection and surrounding space help us start. We confirm the fuel, fit, demand and installation scope before finalizing equipment and pricing. An existing 50-gallon tank alone does not establish compatibility.
Plan a Ruud replacement with WHE
Water Heating Experts helps homeowners in Palm Beach Gardens, Jupiter and nearby Palm Beach County communities compare equipment and installation needs. See our gas water heater installation service, Ruud model guides and complete model catalog. Include the full model number when requesting an estimate so the proposed fuel, burner and connection arrangement are clear.
Official Ruud documents
- Professional Achiever Atmospheric family page
- Specification sheet RU-PROA-ATM-SS-10.25, October 2025 (model table on page 2)
- Residential gas FVIR use and care manual AP14328-5, May 2017
- Residential six-year limited warranty certificate AP16826-2
Specifications checked October 17, 2026. Use the instructions and warranty supplied with the delivered heater.