Much of the alternative energy conversation focuses 
on solar or wind power. However, that dialogue 
ignores one of the largest potential sources of power: 
waste heat.
 
Pouring out of building mechanical systems, this heat 
has tremendous potential to be captured. Instead of 
allowing it to dissipate, waste heat can be used to save 
immense amounts of power for buildings without 
resorting to burning new fossil fuels.
 
Capitalizing on this enormous opportunity to conserve 
and reuse, the Grundfos SIGMA Waterheater is a 
sustainable, innovative solution that provides hot 
water to commercial buildings without burning fossil 
fuel.
 
This beautifully simple water heater harnesses existing 
processes to maximize efficiency. It reclaims the 
building’s own waste heat to produce hot water, thus 
conserving energy on the cooling side and on the hot 
water heating side. As water returns, the SIGMA 
Waterheater pulls the excess heat out of the system, 
increasing the efficiency of the cooling system while 
also heating potable water. 
 
The design showcases not only a commitment to the 
environment, but also a truly useful, usable product. 
Innovative fabric panels lift free of the sides for easy 
maintenance. Using fabric for casing also reduces the 
product’s weight by 30 percent, saving energy and 
monetary costs for shipping. 
Completely modular, the SIGMA Waterheater was 
designed to expand. New modules can be seamlessly 
added as demand increases or buildings grow. 
 
iPad controls add to the benefits of the SIGMA 
Waterheater. Industrial design seamlessly meets 
interface design with technology-based monitoring 
and maintenance regulators modeled for ease of use.
 
As we work towards cleaner energy, it is vital to get 
the most use out of our traditional energy sources. 
The SIGMA Waterheater assists in bridging this gap 
while demonstrating the vital role that innovation and 
efficiency plays in the clean energy equation.