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APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank
APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank

APOLLO DHW120 MAX - Stainless Combined Indirect Water Heater Tank

$3,406.99

DHW Volume: 95 gal
Buffer Volume: 25 gal
Buffer Prefilled: 25 gal 100% glycol
APOLLO Patent:
DCW inlet 20% savings

Guaranteed safe checkout

  • USA/CAN Shipping
  • 30 Day Return
  • Active Support
  • Since 2008
  • Space-Saving 2-in-1 DesignCleverly integrates a 95-gal Domestic Hot Water tank and a 25-gal Buffer Tank into a single unit.
  • Premium 316 Stainless SteelEngineered with thick, high-grade stainless steel for exceptional durability and corrosion resistance.
  • Heat Pump OptimizedThe built-in buffer tank prevents temperature spikes and aids in the winter defrost cycle for hydronic systems.
  • High-Efficiency InsulationFeatures 2-inch thick insulation to minimize heat loss, reduce condensation, and save energy.
  • Seamless System IntegrationDesigned without an inner coil for perfect compatibility with external plate heat exchangers or Hydro Smart systems.

Product details

STAINLESS COMBINED INDIRECT WATER HEATER TANK WITH BUFFER – SPACE-SAVING ALL-IN-ONE DESIGN

The APOLLO DHW120 MAX is a combined domestic hot water (DHW) and buffer tank, designed for the APOLLO heat pump systems. Built in stainless steel 316, it delivers high durability, excellent insulation, and optimized system performance for residential or commercial installations.

 

Key Benefits

  • All-in-one DHW + buffer tank to save space and simplify installation
  • Buffer (25 gal) for improved heat pump performance and defrost cycles
  • Buffer prefilled with 25 gal. 100% propylene glycol
  • High insulation (2"–3") to reduce heat loss and prevent condensation
  • Stainless steel 316 construction for long-lasting corrosion resistance
  • Domestic cold water inlet APOLLO patent design for 20% more hot water

 

Specifications

  • DHW Volume: 95 gal (359 L)
  • Buffer Volume: 25 gal (94 L) – Prefilled with 100% Propylene Glycol
  • Material: Stainless Steel 316 (inner tank & coil)
  • Connections: DHW Inlet/Outlet: 3/4", Hydro Smart Inlet/Outlet: 1", Buffer connections: 1"
  • Insulation: 2" sides / 3" top polyurethane foam
  • Pressure Rating: 200 psi
  • Relief Valve: 120 psi
  • Drain Valve: Included
  • Warranty: 10 years
  • Application: Residential & commercial heat pump systems

Customer Success Stories

Quote Icon

Since installing the buffer tank, I’ve cut glycol costs, reduced electricity usage, and improved overall system efficiency. It keeps my home at a stable temperature overnight and even gives me peace of mind during power outages. It’s like having a thermal battery that optimizes everything.

The Perfect Alternative to Natural Gas

High efficiency for heating, cooling, and hot water with low electric bills

The Perfect Alternative to Natural Gas

The Perfect Alternative to Natural Gas

Features

Specs

Reviews/Q&A

Manual
Thermostat.png

APOLLO Buffer Tank Series DHW120 MAX

Space-Saving Efficiency and Durability

Combined tank for DHW and Buffer tank in one unit. Ideal for APOLLO Heat Pump Installations. 

APOLLO DHW120 MAX

  • Compact & Multifunction

    Save space with a dual-function design for both domestic hot water and buffer storage.
  • Durable Construction

    Built with high-quality stainless steel 316 for unmatched durability. Compatible with Hydro Smart systems or plate heat exchangers (PHE) for efficient heat transfer.
  • High Insulation

    Featuring 2" polyurethane foam insulation to prevent condensation and minimize heat loss.
  • Over $1000 of Glycol included

    Buffer volume filled with 100% Propylene Glycol for optimal heat pump performance and defrost cycles.
  • Ample Capacity

    Offers a generous 95-gallon domestic hot water volume and a 25-gallon buffer tank, ensuring ample supply for both heating and hot water needs.
  • Reliable Performance

    Comes with a robust 10-year warranty, ensuring reliable and worry-free operation.
AP-DHW120-1

Main Features

Space-Saving Design

The APOLLO DHW120 MAX combines both DHW and Buffer tanks in one unit. Ideal for space-saving installations, perfect for residential and commercial use.

Durable and Efficient Heating

Built with high-quality stainless steel 316 (1/16" thickness) and a painted galvanized steel outer jacket (1/32" thickness), ensuring exceptional durability and performance. The DHW tank is designed to work seamlessly with Hydro Smart systems or plate heat exchangers, providing reliable and energy-efficient hot water supply.

Optimal Performance

Designed for APOLLO Heat Pumps, the buffer volume is prefilled with 24 gallons of 100% Propylene Glycol, helping manage low or no-load conditions, preventing temperature spikes, and aiding in winter defrost cycles.

Advanced Features

Includes 1-1/4" stainless steel valves for main input/output, 2" polyurethane foam insulation, a drain valve, and a pressure relief valve rated at 125 psi. It is designed for longevity and optimal performance.

Enjoy a world of benefits by installing the APOLLO DHW 120 MAX

The multipurpose Tank of Your Dreams

  • Water always available when you need it
  • The pleasure of having water for a comforting shower
  • All the water you need to do daily tasks
  • Abundant pre-heating water for the washing machine
  • It is wonderful, we finally made it work. I have to say that Allan and Jesus are wonderful.
    ★★★★★

    Jocelyne,

    A Happy Customer
  • The quality is very impressive! Don't over pay for other brands. Allen, Jesus and the MBtek team are very helpful both before and after the sale. Thank you for the great experience guys.
    ★★★★★

    Todd,

    A Happy Customer
  • Product arrived well packed, and undamaged.
    Customer service was great! Very helpful over the phone. Looking forward to doing more business in the future.
    ★★★★★

    Greg,

    A Happy Customer

Frequently asked questions

Where can I find a dealer?

You can speak directly with one of our sales agents via phone, email or text message for more information.

Who will install my tank?

Mbtek does not complete the installation. Any professional technician will be able to install your purchase. If you require assistance finding one, we are here to help.

What if my thermostat arrives broken?

We offer a 30-day return policy. If your thermostat arrives broken, we will replace it at no cost to you.

When will I receive my unit?

As soon as the unit is in stock, we will book the shipment following business day. The availability (or ETA) of a specific unit is mentioned on the top of each product page. Depending on your location, delivery can take anywhere from 3 to 12 days

Do I have to pay customs fees if my unit is coming from another country?

No. We take responsibility for these charges.

Are your products shipped in the U.S. or Canada?

It varies for each product. However, we have warehouses in Pennsylvania (U.S.), Alberta (CAN), and Quebec (CAN).

What is the product warranty?

The compressor includes a 10-year warranty.

Need an installer?

We made it easy for you.

Please note that listed installers are independent contractors and not employees of MBTek.
They are skilled professionals familiar with our products and capable of efficient installation.

Any Questions?

Reach out to us

Technical Specifications

Model DHW120 MAX
A 75"
B 25"
C 54"
D 14.5"
E 25"

Basic Information:

Inner Tank Material Stainless Steel 316, Thickness: 1/16"
DHW Volume 95 gallons
Buffer Volume 25 gallons (prefilled with 24 gallons of glycol)
Outer Jacket Material Painted Galvanized Steel, 1/32" thickness
Insulation 2" thickness
Connections NPT female
Drain Valve Included
Pressure Relief 125 psi, 210°F (CSA/UL certified)
Compatibility Hydro Smart system or Plate Heat Exchanger (PHE)
Key Benefit No internal coil, designed for external heat exchange systems
Insulation 2" Polyurethane foam on the side and 3" on top
DHW120-1

Diagram:

Apollo_DHW_120

Customer Reviews

Based on 49 reviews
71%
(35)
14%
(7)
8%
(4)
4%
(2)
2%
(1)
S
Sophia Nguyen
Great investment

Worth every penny

D
Daniel Host
Ideal for Vacation Rental

As a vacation rental owner, I'm always looking for ways to improve guest experience while keeping costs down. The Apollo DHW110 Max has been a fantastic addition to our property. Guests love the endless hot water, especially large groups. The energy efficiency has significantly reduced our utility costs, improving our bottom line. The quiet operation means no complaints about noise, even from light sleepers. The durable construction gives me peace of mind about longevity. It's been a worthwhile investment that has already paid off in positive reviews and repeat bookings.

J
Jamal Williams
Quiet Giant

This water heater is surprisingly quiet. Can barely tell it's running.

J
Jim Allen
Great for Business Use

We installed the Apollo DHW110 Max in our small gym, and it's been a fantastic addition. The large capacity ensures our members always have hot water for showers, even during peak hours. Energy efficiency has helped keep our operating costs down, which is crucial for a small business. The quiet operation is a plus - members don't even notice it's there. Durability seems good so far, handling constant use without issues. The initial investment was significant, but the long-term savings and improved member satisfaction make it worthwhile. Highly recommend for small businesses with high hot water demands.

O
Olaf Svensson
Efficient and Reliable

The Apollo DHW110 Max has been a game-changer for our household. It's incredibly efficient and we always have hot water when we need it.

Technical & User Manuals

This documentation covers many of the topics of interest to end-users and maintenance staff. For any additional inquiries, contact us.
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