Central heating installation

June 11, 2018

A great application for the ThermoDrain is building with central water heating. Thermodrain will help reduce the overall cost of water heating. In this type of installation, several dwellings share a single ThermoDrain making this an ideal and cost-effective application.

Here is an example of ROI:
A building having 24 housing units has central water heating. Three drain stacks service two units per floor each. Given the total shower time for each unit is 30 minutes per day and standard flow shower heads are used at a shower temperature of 39°C (102°F). The natural gas heater is 78% efficient. The annual energy that is wasted down the drain is 281 GJ from the showers alone.

The potential for drain water heat energy recovery is calculated based on preheating the cold water going to the water heater using two ThermoDrain unit per drain stack. At an estimated 0.46$ per m3, the energy cost saving is 1519$/year with a 3-year payback.

Contact us to get a customize ROI for your project.

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