Note that a standard electric water heater has a coefficient of performance (COP) of 1.0, meaning that it is 100% efficient. 1 kW of electrical input gives 1 kW of heat output. 100% efficiency sounds good, but not really. Depending on ambient temperature, a heat pump such as Chiltrix will have a COP of between 2 and >4 (200% to >400% efficient) depending on ambient temperature. That’s why heat pump water heaters are becoming popular. Adopting the European approach to heat pump system design, the Chiltrix DHW multi-function method allows your heating/cooling system to also perform as a high-efficiency water heater. And the Chiltrix method has higher net efficiency than a typical USA-style self-contained heat pump water heater because the “cooling” side of the Chiltrix water heating system is outdoors and does not rob heat from the indoors during winter. The water heating function can be used with Chiltrix in a ducted design, with fan coils, with radiant heating, air handlers, or with any combination of the above. Below: Diagram of major components, fan coil system with water heating. |
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Note #1, neither CX heat pumps or the DHW40 or DHW80 tanks are designed or supported for recirculating DHW systems. Call to discuss recirculating systems using a DHW 105 tank. In many cases the Chiltrix system works with DHW40/80 for recirculating hot water systems but we do not recommend them that way. Note #2, if you select an indirect tank from a different supplier that’s fine, just make sure it has a convoluted coil with least .375 ft^2 of coil surface area per gallon with at least 1″ ID and is configured with a backup element.
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Super-Efficient Heat Exchanger Tanks (Ultra-High Performance All-Stainless Steel Tanks)Produced by Chiltrix for maximum performance with a heat pump, these tanks have a giant, oversized, convoluted coils. Inner tanks use 2205 Duplex stainless steel for maximum corrosion resistance, outer tank is SUS 304 stainless steel. |
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| 70 Gallons All-Stainless Heat Exchanger Tank, 1x 66 Ft. * 1.25″ single-wall convoluted coil, DHW80 has 75 gallons net Spec Sheet |
| 35 Gallons All-Stainless Heat Exchanger Tank, 1x 34 Ft. * 1.25″ single-wall convoluted coil, DHW40 has 36 gallons net Spec Sheet |
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NEW! Do you have massive domestic hot water requiements? Consider the Hitzewelle Reverse Indirect Water Heater (Chiltrix DHW105)
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| 93 Gallons Reverse-Indirect DHW Tank All-Stainless Heat Exchanger Tank, 1x 196 Ft. * 1.25″ single-wall convoluted coil, DHW105 has 93 gallons net Spec Sheet FOR USE WITH CX50-2 and CX35 ONLY. |
The Chiltrix line of 2205 Duplex stainless inner tank offers the highest corrosion resistance of any available stainless steel tank material. The Chiltrix DHW80 tanks (75 gallons net of coil) and DHW40 (36 gallons net of coil) are designed to outperform every indirect heat exchanger tank or solar tank on the market, with .43 ft^2 per gallon of coil surface area, the fastest heat transfer, and truly exceptional durability. The DHW 40/80 tanks convoluted coil also disrupts laminar flow for a further increase in thermal performance.
See Hitzewelle DHW105 Reverse Indirect DHW Tank
^NOTE 1 generally, the DHW40 tank is for an ADU or tiny house, 1-2 occupants. Tank size is not linear to apparent capacity, meaning, for example, reducing tank size by 50% reduces the number of supported occupants by more than 50%,
*NOTE 2 DHW40 is not compatible with CX50. This tank is best used with the smaller sized CX units.
See the difference between a standard coil and a convoluted coil here
See pictures of DHW80 stainless steel indirect water tank
About Duplex 2205 Stainless Steel
Automated Anti-Legionella Function
*IMPORTANT NOTE*
Adding DHW always requires adding a Chiltrix DHW valve.
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