Hydronic Systems

Daikin ALTHERMA

High-temperature air-to-water heat pump for
heating, cooling, and domestic hot water for your home.

our recommendations

ALTHERMA Products

Daikin ALTHERMA 3 H HT - UTBX040EF6VJ

Wall-mounted indoor unit (Hydrobox) contains hydronic components.

01

Overview

  • Comfort
  • Efficiency
  • Technology
  • Indoor Air Quality

The wall‑mounted Hydrobox houses all key hydraulic components, making installation simple and reducing the need for extra parts. Its compact size fits easily into tight spaces with almost no side clearance required. For a complete indoor solution, the Hydrobox pairs seamlessly with the Daikin ALTHERMA stainless‑steel hot water tank, creating an efficient, space‑saving setup for heating, cooling, and domestic hot water.

02

Comfort

  • Overview
  • Efficiency
  • Technology
  • Indoor Air Quality

The advanced user interface is simple to use, with just a few buttons and two easy‑turn knobs. Installers can run test cycles to confirm everything is working properly, ensuring a smooth setup. The Daikin Eye gives instant feedback on system status—blue for normal operation and red for an issue—so homeowners can quickly understand and manage their comfort system with confidence.

03

Efficiency

  • Overview
  • Comfort
  • Technology
  • Indoor Air Quality

The Hydrobox supports the system’s all‑electric, water‑based heating and cooling design, helping it run efficiently with modern inverter‑powered components that deliver steady, reliable comfort.

04

Technology

  • Overview
  • Comfort
  • Efficiency
  • Indoor Air Quality

The user interface makes setup simple, with a streamlined 9‑step configuration process for installers. The Hydrobox is designed for easy service access, giving clear reach to the PCB board and hydraulic components. It also includes a built‑in 6 kW electric backup heater that can operate at 2, 4, or 6 kW, ensuring reliable comfort when extra heating support is needed.

05

Indoor Air Quality

  • Overview
  • Comfort
  • Efficiency
  • Technology

With Daikin’s efficiency, quality, and smart controls, you can shape your ideal indoor environment, so every day feels just right. The indoor unit helps maintain steady temperatures and balanced humidity, creating a fresher, more comfortable home.

Features & Specs
Warranty & Documents
Reviews

Features & Specs

Explore product manuals, warranty details, and other essential resources.

Features

  • Built‑in essentials: Includes a circulating pump, magnetic filter/dirt separator, and expansion vessel for a streamlined setup.
  • Backup heat when you need it: Integrated 6 kW electric heater with 2, 4, and 6 kW stages for added reliability.
  • Service‑friendly design: Easy access to the PCB board and hydraulic components.
  • Compact and flexible: Fits into small spaces with virtually no side clearance required.
  • Instant system feedback: The Daikin Eye shows real‑time status—blue for normal operation, red for an issue.
  • Fast setup: Installers can fully configure the unit in just 9 steps during setup.
  • Built‑in test cycles: Installers can quickly verify that the system is ready to run.
  • Simple controls: Operate the system with just a few buttons and two easy‑turn knobs.
  • Complete home solution: Pairs seamlessly with the Daikin ALTHERMA stainless‑steel domestic hot water tank.

Tech Specs

  • Inverter Technology
    • Dimensions (H × W × D): 33 1/8" × 17 5/16" × 15 3/8"
    • Weight: 83.8 lbs
    • Casing: White + Black; Resin and sheet metal
    • Water circuit connection: NPT 1” (female)
    • Indoor installation ambient range: 41°F ~ 95°F
    • Sound power level: 44 dBA
    • Sound pressure level: 30 dBA
    • Backup heater capacity: 6 kW

Warranty & Documents

Explore product manuals, warranty details, and other essential resources.

5 Year Parts

warranty

* Complete warranty available from your local dealer or at www.daikincomfort.com. To receive the 5-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. The duration of warranty coverage may depend on the state in which you reside. Some states and provinces do not allow warranty coverage to be conditioned on registration. For a list of states and provinces that do not allow warranty coverage to be conditioned on registration, please visit www.daikincomfort.com/warranty-information or, to request a paper copy of this information, please call us at 1-855-502-3903. Other limitations and exclusions apply, refer to complete warranty details for full list of limitations and exclusions.

Warranty Certificate - PWDACHPAFV-Altherma

Product Brochure

Product Brochure - CB-ALTH_3HHT_R32

Product Flyer

Product Flyer - PF-ALT-3HHT

Engineering Manual

Engineering Manual - EM-UPRA-DAVK_UTBX

Installation Manual

Installation Manual - 4PEN-US815178-1

Submittal Data

Submittal Data - Submittal_UPRA036DAVK-UTBX040EF6VJ Submittal Data - Submittal_UPRA043DAVK-UTBX040EF6VJ

Download valuable resources or send them to your inbox.

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Compatible Products

Explore compatible products and get connected with Contractors and Distributors.

Looking for parts?

Access the Daikin Spare Parts Bank now.

Reviews

Explore customer reviews and testimonials.

butterfly

Find a nearby Daikin Pro.

Get started with a Daikin Professional for recommendations and estimates for installing your Daikin comfort system.

My Favorites

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Daikin respects your privacy. Our Privacy Policy outlines how we collect and use information. By submitting your information here, you agree that we may contact you about our current and future products and services and that you are directing us to provide your submitted information to independent dealers in your area that offer our products and services. Your agreement and consent are not required to make a purchase but help facilitate future communications about, and the purchase of, Daikin, Goodman, and Amana-brand products and services.

You can unsubscribe from these communications at any time. For more information on how to unsubscribe, our privacy practices, and how we are committed to protecting and respecting your privacy, please review our Privacy Policy.

By clicking submit below, you consent to allow Daikin to store and process the personal information submitted above to provide you the content requested.

Daikin ALTHERMA 3 H HT - UTBX040EF6VJ

Wall-mounted indoor unit (Hydrobox) contains hydronic components.

01

Overview

  • Comfort
  • Efficiency
  • Technology
  • Indoor Air Quality

The wall‑mounted Hydrobox houses all key hydraulic components, making installation simple and reducing the need for extra parts. Its compact size fits easily into tight spaces with almost no side clearance required. For a complete indoor solution, the Hydrobox pairs seamlessly with the Daikin ALTHERMA stainless‑steel hot water tank, creating an efficient, space‑saving setup for heating, cooling, and domestic hot water.

02

Comfort

  • Overview
  • Efficiency
  • Technology
  • Indoor Air Quality

The advanced user interface is simple to use, with just a few buttons and two easy‑turn knobs. Installers can run test cycles to confirm everything is working properly, ensuring a smooth setup. The Daikin Eye gives instant feedback on system status—blue for normal operation and red for an issue—so homeowners can quickly understand and manage their comfort system with confidence.

03

Efficiency

  • Overview
  • Comfort
  • Technology
  • Indoor Air Quality

The Hydrobox supports the system’s all‑electric, water‑based heating and cooling design, helping it run efficiently with modern inverter‑powered components that deliver steady, reliable comfort.

04

Technology

  • Overview
  • Comfort
  • Efficiency
  • Indoor Air Quality

The user interface makes setup simple, with a streamlined 9‑step configuration process for installers. The Hydrobox is designed for easy service access, giving clear reach to the PCB board and hydraulic components. It also includes a built‑in 6 kW electric backup heater that can operate at 2, 4, or 6 kW, ensuring reliable comfort when extra heating support is needed.

05

Indoor Air Quality

  • Overview
  • Comfort
  • Efficiency
  • Technology

With Daikin’s efficiency, quality, and smart controls, you can shape your ideal indoor environment, so every day feels just right. The indoor unit helps maintain steady temperatures and balanced humidity, creating a fresher, more comfortable home.

Features & Specs
Warranty & Documents
Reviews

Features & Specs

Explore product manuals, warranty details, and other essential resources.

Features

  • Built‑in essentials: Includes a circulating pump, magnetic filter/dirt separator, and expansion vessel for a streamlined setup.
  • Backup heat when you need it: Integrated 6 kW electric heater with 2, 4, and 6 kW stages for added reliability.
  • Service‑friendly design: Easy access to the PCB board and hydraulic components.
  • Compact and flexible: Fits into small spaces with virtually no side clearance required.
  • Instant system feedback: The Daikin Eye shows real‑time status—blue for normal operation, red for an issue.
  • Fast setup: Installers can fully configure the unit in just 9 steps during setup.
  • Built‑in test cycles: Installers can quickly verify that the system is ready to run.
  • Simple controls: Operate the system with just a few buttons and two easy‑turn knobs.
  • Complete home solution: Pairs seamlessly with the Daikin ALTHERMA stainless‑steel domestic hot water tank.

Tech Specs

  • Inverter Technology
    • Dimensions (H × W × D): 33 1/8" × 17 5/16" × 15 3/8"
    • Weight: 83.8 lbs
    • Casing: White + Black; Resin and sheet metal
    • Water circuit connection: NPT 1” (female)
    • Indoor installation ambient range: 41°F ~ 95°F
    • Sound power level: 44 dBA
    • Sound pressure level: 30 dBA
    • Backup heater capacity: 6 kW

Warranty & Documents

Explore product manuals, warranty details, and other essential resources.

5 Year Parts

warranty

* Complete warranty available from your local dealer or at www.daikincomfort.com. To receive the 5-Year Parts Limited Warranty, online registration must be completed within 60 days of installation. The duration of warranty coverage may depend on the state in which you reside. Some states and provinces do not allow warranty coverage to be conditioned on registration. For a list of states and provinces that do not allow warranty coverage to be conditioned on registration, please visit www.daikincomfort.com/warranty-information or, to request a paper copy of this information, please call us at 1-855-502-3903. Other limitations and exclusions apply, refer to complete warranty details for full list of limitations and exclusions.

Warranty Certificate - PWDACHPAFV-Altherma

Product Brochure

Product Brochure - CB-ALTH_3HHT_R32

Product Flyer

Product Flyer - PF-ALT-3HHT

Engineering Manual

Engineering Manual - EM-UPRA-DAVK_UTBX

Installation Manual

Installation Manual - 4PEN-US815178-1

Submittal Data

Submittal Data - Submittal_UPRA036DAVK-UTBX040EF6VJ Submittal Data - Submittal_UPRA043DAVK-UTBX040EF6VJ

Download valuable resources or send them to your inbox.

Sent Successfully

Something went wrong

Compatible Products

Explore compatible products and get connected with Contractors and Distributors.

Looking for parts?

Access the Daikin Spare Parts Bank now.

Reviews

Explore customer reviews and testimonials.

butterfly

Find a nearby Daikin Pro.

Get started with a Daikin Professional for recommendations and estimates for installing your Daikin comfort system.

My Favorites

Please enter your details to save and access your favorites

Daikin respects your privacy. Our Privacy Policy outlines how we collect and use information. By submitting your information here, you agree that we may contact you about our current and future products and services and that you are directing us to provide your submitted information to independent dealers in your area that offer our products and services. Your agreement and consent are not required to make a purchase but help facilitate future communications about, and the purchase of, Daikin, Goodman, and Amana-brand products and services.

You can unsubscribe from these communications at any time. For more information on how to unsubscribe, our privacy practices, and how we are committed to protecting and respecting your privacy, please review our Privacy Policy.

By clicking submit below, you consent to allow Daikin to store and process the personal information submitted above to provide you the content requested.

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