flexiblefullpage -
billboard - default
interstitial1 - interstitial
Currently Reading

Turning lost heat to energy is what sets this HVAC boiler apart


Turning lost heat to energy is what sets this HVAC boiler apart

Enviro Power’s SmartWatt has been installed in residential and commercial buildings.

February 27, 2023
The SmartWatt replacement boiler also turns escaping heat into electricity. Images: Courtesy of Enviro Power
Enviro Power's SmartWatt replacement boiler efficiently converts lost heat into electricity. It is suitable for both new and existing buildings. Images: Courtesy of Enviro Power Technologies

Who says HVAC is staid?

Heat pumps, whose unit sales surpassed gas furnaces for the first time last year, are steadily gaining mainstream acceptance in the U.S. as environmentally friendlier all-in-one heating and cooling alternatives that run on electricity.

Another kind of heating system is trying to make inroads, too.  Last year, Connecticut-based Enviro Power Technologies, in partnership with the national manufacturer Burnham Holdings, began production on SmartWatt, a first-of-its kind replacement boiler with a mini power plant that converts lost heat into electricity.

SmartWatt in December achieved Intertek ETL certification, which indicates compliance with North American safety standards. Dan Nadav, Enviro Power’s CEO, expects his company will sell between 100 and 200 units in 2023, and at least 500 units in 2024.

Among the AEC companies that have endorsed SmartWatt is the engineering firm Syska Hennessy. “We see growing pressure on our customers’ end to lower [their] carbon footprint and cost of energy,” says Robert Ioanna, PE, LEED AP, Executive Principal at Syska Hennessy Group. “SmartWatt provides a decarbonizing and energy saving solution designed as a drop-in replacement that can be implemented today and has a two- to three-year ROI before incentives are applied.”

Installation that fits the infrastructure

Nadav has two decades of experience working with what he calls distributed generation technologies. His partner, Michael Cocuzza, who is Enviro Power’s’ Chief Technology Officer and President, has 10-plus years’ experience in mechanical design and the patenting of energy solutions.

Enviro Power estimates that 10 million boilers are replaced each year in Europe and North America. But many existing buildings are still operating on antiquated heating systems. “We needed to act now,” says Nadav, to standardize its product around a building’s existing infrastructure and the replacement market.

Enviro Power developed SmartWatt’s mini power plant with Windings, Inc., a Minnesota-based maker of motors and generators. The company currently offers two boilers: a 5-kilowatt 150,000 BTUh unit that’s suitable for single-family homes; and a 6-kW 300,000 BTUh unit for multifamily and commercial buildings. The larger unit’s price starts at around $20,000 to install, and would begin returning that investment in the boiler’s first year of operation, says Nadav, figuring the cost of a kilowatt hour at 25 cents and the building operating between 4,000 and 7,000 hours per year.

Nadav calculates that in a sophisticated energy grid market like New England, the installation of 1,000 SmartWatt boilers would have the potential for saving 30,000 tons of CO2, or the equivalent of the carbon footprint of 1,700 homes.


Dan Nadav, CEO, Enviro Power Technologies
Dan Nadav, Enviro Power's CEO, has been involved in distributed generation for two decades.

Focusing growth on the Northeast first

Freedom Property is a real estate property manager based in Southington, Conn., that specializes small-to-midsize multifamily redevelopments. It currently manages 160 apartment units, a number that is on track to increase to between 200 and 225 by the end of this year, says Luke Florian, who started the company in 2014.

Last October, Freedom Property installed its first SmartWatt boiler, the 6-kW model, at a cost of $24,000. The building was installed in the former Iron Horse Inn that Florian had converted into 25 boutique apartments. The boiler is providing domestic hot water, and the mini plant is powering the lights for the building’s corridor and parking lot.

(Enviro Power estimates that a 6-kW unit has the capacity to provide domestic hot water, with the appropriate storage tank, for up to 50 apartments before a second unit would be needed. If the SmartWatt unit is also providing space heating, it could handle up to eight apartments.)

Florian—who went to high school with Cocuzza and had stayed in touch—told BD+C early this month that he was planning to replace an existing boiler with a SmartWatt unit in another building in East Hartford, Conn., with 21 apartments. “It’s a great technology.” And while he won’t know the savings definitively until four or five billing cycles, “it’s trending positively.”

Last fall, Wesleyan University in Middletown, Conn., installed a SmartWatt boiler in its Butterfield student dormitory complex. The system was initially tested at the 56,000-sf Butterfield C dorm, and now provides hot water and “free” electricity to the three-story, 197-student residence and dining hall.

Sen. Chris Murphy (D-Conn.) recently praised the SmartWatt technology, and named Enviro Power a 2022 Innovator. “Working with Enviro Power checks every box—engaging with a high-quality local manufacturer, advancing new technology, improving energy efficiency in University buildings, and reducing our energy costs.”

Ioanna of Syska Hennessy says now that SmartWatt is certified and under production, his firm can start introducing the boiler to its customers.

Nadav says that his company’s growth strategy would focus initially on the Northeast market, and then it would start bringing out larger units: a 400,000-BTUIh model this year, and a 20-kW, 1 million BTUh model in 2024 for hotels and hospitals.

Ultimately, Nadav says that Enviro Power wants to offer a cogeneration system that provides backup power.


Related Stories

Codes | Mar 2, 2023

Biden Administration’s proposed building materials rules increase domestic requirements

The Biden Administration’s proposal on building materials rules used on federal construction and federally funded state and local buildings would significantly boost the made-in-America mandate. In the past, products could qualify as domestically made if at least 55% of the value of their components were from the U.S. 

Healthcare Facilities | Jan 31, 2023

How to solve humidity issues in hospitals and healthcare facilities

Humidity control is one of the top mechanical issues healthcare clients face. SSR's Lee Nordholm, PE, LEED AP, offers tips for handling humidity issues in hospitals and healthcare facilities.

HVAC | Dec 13, 2022

Energy Management Institute launches online tool to connect building owners with HVAC contractors

The National Energy Management Institute Inc. (NEMI) along with the Biden administration’s Better Air in Buildings website have rolled out a resource to help building owners and managers, school districts, and other officials find HVAC contractors.

75 Top Products | Nov 30, 2022

75 top building products for 2022

Each year, the Building Design+Construction editorial team evaluates the vast universe of new and updated products, materials, and systems for the U.S. building design and construction market. The best-of-the-best products make up our annual 75 Top Products report. 

K-12 Schools | Nov 30, 2022

School districts are prioritizing federal funds for air filtration, HVAC upgrades

U.S. school districts are widely planning to use funds from last year’s American Rescue Plan (ARP) to upgrade or improve air filtration and heating/cooling systems, according to a report from the Center for Green Schools at the U.S. Green Building Council. The report, “School Facilities Funding in the Pandemic,” says air filtration and HVAC upgrades are the top facility improvement choice for the 5,004 school districts included in the analysis.

Data Centers | Nov 28, 2022

Data centers are a hot market—don't waste the heat!

SmithGroup's Brian Rener shares a few ways to integrate data centers in mixed-use sites, utilizing waste heat to optimize the energy demands of the buildings.

Engineers | Nov 10, 2022

U.S. engineering firms cash in on a volatile, expanding market

New practices and markets drive growth for U.S. engineering and engineering-architecture firms. And firms are getting serious about reducing projects’ carbon footprint.

Building Materials | Nov 2, 2022

Design for Freedom: Ending slavery and child labor in the global building materials sector

Sharon Prince, Founder and CEO of Grace Farms and Design for Freedom, discusses DFF's report on slavery and enforced child labor in building products and materials.

BAS and Security | Oct 19, 2022

The biggest cybersecurity threats in commercial real estate, and how to mitigate them

Coleman Wolf, Senior Security Systems Consultant with global engineering firm ESD, outlines the top-three cybersecurity threats to commercial and institutional building owners and property managers, and offers advice on how to deter and defend against hackers. 

Multifamily Housing | Sep 15, 2022

Heat Pumps in Multifamily Projects

RMI's Lacey Tan gives the basics of heat pumps and how they can reduce energy costs and carbon emissions in apartment projects.

boombox1 - default
boombox2 -
native1 -

More In Category

halfpage1 -

Most Popular Content

  1. 2021 Giants 400 Report
  2. Top 150 Architecture Firms for 2019
  3. 13 projects that represent the future of affordable housing
  4. Sagrada Familia completion date pushed back due to coronavirus
  5. Top 160 Architecture Firms 2021


Magazine Subscription

Get our Newsletters

Each day, our editors assemble the latest breaking industry news, hottest trends, and most relevant research, delivered to your inbox.


Follow BD+C: