Tempeff North America products employ Dual Core™ regenerative technology that offers up to 95% temperature efficiency. Other available technologies offer a maximum of approximately 50% to 75% efficiency under ideal circumstances, and much lower real effectiveness in colder temperatures due to frost. The Dual Core design is significantly more energy efficient in all conditions, thus payback periods are extremely attractive.
In winter modes condensation will form on the exhausting heat exchanger. When the cycle changes the outdoor air is passed over the heat exchanger, and that moisture is added back to the airstream. This reduces the need for adding humidity to the conditioned space. In many cases up to 70% latent recovery can be obtained.
Most heat recovery technologies suffer from the same basic drawback. In cold temperatures frost will form on the exhaust side of the heat exchanger, dramatically reducing the heat recovery effectiveness. If a defrost cycle is not employed, frost will build up until the entire heat recovery device becomes inoperable. During the defrost cycle the heat recovery device is usually bypassed, or put into a mode where effectiveness is significantly reduced so that the frost can melt. Thus in times where heat recovery is needed the most (ambient temperatures are coldest) the effectiveness of the device is the lowest. As a result, most technologies require additional heat capacity for these times, usually sized as if there is no heat recovery device at all to ensure the building does not experience periods where cold air is being introduced (during defrost cycles). In turn real effectiveness is greatly reduced increasing operating costs, equipment costs, and life cycle costs.
With the Dual Core™ design frost will never build up in a typical application. With the Dual Core™ heat exchanger, frost doesn’t have a chance to form, and one heat exchanger is always delivering conditioned air to the space. In many cases additional heat is not necessary for the ventilation air, due to the real effectiveness of the system! As a result operating costs, equipment cost, installation cost and overall life cycle costs are significantly reduced compared to traditional heat recovery technology.
Units have been installed in the most demanding North American climates, where temperatures drop below -40 deg F, with excellent results!
With few moving parts, maintenance of the system is very low. Due to cycling nature of the heat exchangers dust rarely builds up on the heat exchangers, thus frequent cleaning is not required. If cleaning is necessary, the cores can be individually removed and cleaned as required!
In a third party audit of a 17 year old installation, performed by CIT Energy Management AB, it was found that the efficiency of the equipment was the same as the day it was installed (90% measured temperature efficiency). Thus owners of Tempeff equipment can rest assured that they will enjoy the high performance of their system for a long time.
Tempeff North America Ltd.
12-2130 Notre Dame Ave.
Winnipeg, MB Canada
R3H 0K1
Ph: 204.783.1902
Fax: 204.633.0496
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