Quick answer:The Rheem Integrity 27 is a premium continuous flow hot water system — 27 litres per minute, 6-star energy rating, frost protected to -20C, made in Japan. Installed from $3,599 incl GST by Water & Gas Worx across Auckland. Price includes the unit, gas pipework, gas compliance certificate, electrical coordination, and removal of your old system. Installed by Peter — licensed plumber and certifying gasfitter. Call 0800 322 322.
About the Rheem Integrity 27
The Rheem Integrity 27 (model 874627NFZ for natural gas, 874627LPZ for LPG) is Rheem's flagship external continuous flow water heater. Made in Japan, it delivers 27 litres per minute at a 25°C temperature rise from a maximum gas input of 205 MJ/h — enough to comfortably run 2.5 to 3 bathrooms simultaneously. Rheem rates it for 4 to 6 people in moderate climates like Auckland.
The Integrity 27 carries a 6-star energy rating and uses electronic ignition with no pilot light. It operates on mains water pressure from 140 to 1000 kPa with a minimum activation flow of just 2 L/min. Frost protection is built in and rated to −20°C — well beyond anything Auckland experiences. Rheem's Flamesafe overheat protection and a digital display for fault diagnosis are standard. At 23 kg and 601 × 351 × 226 mm (H × W × D), the unit is compact enough for most exterior wall positions.
Rheem backs the Integrity 27 with a 10-year heat exchanger warranty (parts) and 3 years parts and labour on all other components for domestic installations. Every installation by Water & Gas Worx includes old unit removal, gas and water connections, gas compliance certificate and warranty registration with Rheem NZ.
Technical Specifications
| Model | 874627NFZ (NG) / 874627LPZ (LPG) |
| Type | External wall-mounted gas continuous flow |
| Maximum flow rate | 27 L/min (at 25°C rise) |
| Minimum activation flow | 2 L/min |
| Gas input (max) | 205 MJ/h |
| Energy star rating | 6 Star |
| Gas type | Natural gas or LPG (specified at purchase) |
| Gas connection | Rp 3/4" (20 mm) |
| Ignition | Electronic ignition (no pilot light) |
| Water pressure range | 140–1000 kPa |
| Water connections (inlet/outlet) | Rp 3/4" (20 mm) |
| Rated household | 4–6 people (moderate climate) / 2.5–3 bathrooms |
| Frost protection | Built-in, rated to −20°C |
| Safety | Flamesafe overheat protection, digital fault display |
| Dimensions (H × W × D) | 601 × 351 × 226 mm |
| Weight | 23 kg |
| Origin | Made in Japan |
| Warranty — domestic | 10 yr heat exchanger (parts) · 3 yr parts & labour |
