Stiebel Eltron Tempra 29 Plus Tankless Water Heater 239223

Description

Stiebel Eltron Tempra 29 Plus Tankless Water Heater 239223 

Brand: Stiebel Eltron SKU: Tempra 29 Plus 

Product Overview

The Stiebel Eltron Tempra 29 Plus is a high-capacity, whole-house electric tankless water heater engineered to deliver an endless and immediate supply of hot water on demand. Operating at a premium 0.98 Uniform Energy Factor (UEF) and a 98% recovery efficiency, this premium unit activates its heating system only when hot water is drawn, entirely eliminating the standby thermal losses associated with traditional storage tanks. Built with exceptional engineering and durable components, it offers a reliable, space-saving, and energy-conscious upgrade for modern residential hot water needs.

As part of the advanced Plus series, this water heater handles multi-fixture loads with precise temperature tracking and delivery. Its compact, wall-mount design reclaims valuable real estate, while its sophisticated internal control systems manage incoming water variations. Engineered to meet strict plumbing safety and durability standards, the Tempra 29 Plus safely accommodates incoming water temperatures up to 131°F, making it perfectly suited as a standalone whole-house unit or an inline temperature booster for pre-heated systems.

Key Features:

• Advanced Flow Control Technology: Automatically adjusts the water flow rate slightly if hot water demand exceeds heating capacity to ensure a completely stable and unvaried output temperature.
• On-Demand Heating Efficiency: Achieves a premium 0.98 UEF rating by warming water instantly at the point of use, helping to lower monthly utility bills while reducing energy waste.
• Compact Wall-Mount Profile: Sleek space-saving dimensions eliminate bulky water storage tanks, allowing for cleaner installations in utility rooms, closets, or tight spaces.
• High-Temperature Input Safe: Safely accommodates incoming water temperatures up to 131°F (55°C) to seamlessly support pre-heated inline or hybrid heating applications.

Technical Specifications:

• Voltage: 240 V or 208 V
• Phase: Single 50/60 Hz (Can be wired for balanced 3-phase 208V)
• Wattage: 28.8 kW (at 240V) / 21.6 kW (at 208V)
• Amperage Draw: 3 x 40 A (at 240V) / 3 x 35 A (at 208V)
• Minimum Recommended Circuit Breakers: 3 x 40 A (at 240V) / 3 x 35 A (at 208V) Double Pole (DP)
• Number of Runs & Minimum Wire Size: 3 x 8/2 AWG Copper
• Dimensions: 16-5/8″ W x 14-1/2″ H x 4-5/8″ D
• Weight: 19.0 lb (8.6 kg)
• Nominal Water Volume: 0.39 gal (1.5 L)
• Water Connections: 3/4″ NPT
• Working / Tested Pressure: 150 psi (10 bar) / 300 psi (20 bar)
• Uniform Energy Factor (UEF) / Recovery Efficiency: 0.98 / 98%
• Certifications: Tested and certified by WQA against NSF/ANSI/CAN 372 for lead-free compliance; Conforms to UL Std. 499; Certified to CAN/CSA Std. C22.2 No.88

Installation & Versatility:

• Main Service Requirements: Requires a minimum main service electrical panel rating of 200 A to safely accommodate the electrical operational load.
• Activation Flow Rate: Triggers heating elements at a minimum water flow rate of 0.77 GPM (2.9 L/min) to comfortably support modern low-flow plumbing fixtures.
• Standardized Piping Connections: Built with robust 3/4″ NPT threads to guarantee a straightforward plumbing installation with standard lines.
• Pressure Durability: Engineered to function smoothly at a minimum operational water pressure of 30 psi and rated to manage working pressures up to 150 psi.

Common Applications:

• Whole-House Residential: Serves as an exceptionally efficient water heating hub capable of managing multiple high-demand fixtures simultaneously in residential homes.
• Inline System Boosting: Installs perfectly down-line from a centralized primary water source to maintain and restore proper temperatures over long pipe distances.
• Vacation Properties & Cabins: Provides immediate hot water upon arrival and can be completely powered down when vacant to eliminate off-season utility expenses.

Frequently Asked Questions:

Q: What is the maximum temperature rise this unit can provide at a flow rate of 1.50 GPM?

A: At a flow rate of 1.50 GPM, the Tempra 29 Plus provides a maximum temperature rise of 92°F when operating on either 240V or 208V power supplies.

Q: What size electrical wire and circuit breakers are necessary for installation at 240V?

A: When operating at 240V, the installation requires three dedicated runs of 8/2 AWG copper wire and three minimum recommended 40 A double-pole (DP) circuit breakers.

Q: Is this water heater safe for drinking water lines?

A: Yes, it is fully tested and certified by the WQA against NSF/ANSI/CAN 372 for strict lead-free compliance.

The Stiebel Eltron Tempra 29 Plus is an exceptionally compact and energy-efficient tankless water heater, making it an ideal choice for contractors and homeowners looking to optimize space and maximize hot water performance.