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Each year, PM Engineer editors receive thousands of product releases from industry manufacturers. The 20 products highlighted here have earned the distinction of being PM Engineer’s Top Products of 2023 based on the number of pageviews on www.pmengineer.com. Congratulations to those products on this year’s list.

#20 Ranking icon

Rheem commercial gas water heater

PM Engineer's Top 20 Products of 2023: #20 Rheem commercial gas water heater

Image courtesy of Rheem

Triton Super and Light Duty water heaters feature up to 98% thermal efficiency, and eliminate downtime with the ability to detect and prevent water heater problems before they occur, the company says. Triton units feature LeakGuard and LeakSense, an all-inclusive leak detection and prevention system with a proprietary auto shut-off valve limiting leakage to no more than 24 ounces of water and providing real-time leak notifications; multiple water connects on the top, back and front of the unit, along with flexible venting to simplify installation; and a patented heat exchanger design and advanced power anodes to extend the unit’s life. Triton units include a five-year warranty.

Rheem | www.rheem.com

#19 Ranking icon

American Standard ultra-low NOx commercial water heater

PM Engineer's Top 20 Products of 2023: #19 American Standard ultra-low NOx commercial water heater

Image courtesy of American Standard

American Standard Water Heaters High Efficiency Ultra-Low NOx commercial gas-fired water heater provides up to 250K Btu input with 97% thermal efficiency. The unit operates on natural and LP gas and includes electronic controls for ignition and temperature, zero-inch clearance and a full-size hand-hole cleanout port. It is available in 70 and 100-gallon capacities and is Energy Star- and AHRI-certified.

American Standard | www.americanstandardwaterheaters.com

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#18 Ranking icon

Intellihot heat pump water heater sizing tool

PM Engineer's Top 20 Products of 2023: #18 Intellihot heat pump water heater sizing tool

Image courtesy of Intellihot

Intellihot’s telliSize is a six-dimension simulation software tool for correctly sizing heat pump water heaters. telliSize uses real-world data and advanced mathematical models to simulate performance over 365 days to provide guaranteed sizing for plumbing engineers and architects. Three different sizing options are provided to meet varying needs: an option with the least upfront cost, one with the lowest operational expenses, and one that balances both. Users select their property type and input their zip code, fixture count and desired outlet temperature online at telliSize. Then, the calculator uses real-world data from similar properties and runs an advanced dynamic mathematical model on cloud computers using parallel computing technology. The users are emailed configuration options within three business days. Intellihot is so confident in its telliSize tool that it even offers a guarantee — if any of the selections fail to meet the user’s hot water demand, Intellihot will supply additional equipment at no extra cost.

Intellihot | www.intellihot.com

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#17 Ranking icon

Webstone water heater solution

PM Engineer's Top 20 Products of 2023: #17 Webstone water heater solution

Image courtesy of NIBCO

NIBCO announced enhancements to the Webstone line of water heater solutions, a series of valves designed to simplify the installation of storage tank water heaters. Developments include new features for the patent-pending Pro-Pal Water Heater Supply Valves to offer brass union or dielectric union water heater connections, 1/2" sizes, and an integration of a 1/2" cold-water tapping port. Additionally, the line of Pro-Pal Water Heater Service Valve Kits has expanded to include new connection options and tempering valve kits, which take advantage of the newly integrated access point.

NIBCO | www.webstonevalves.com

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#16 Ranking icon

Rinnai wall hung commercial boiler

PM Engineer's Top 20 Products of 2023: #16 Rinnai wall hung commercial boiler

Image courtesy of Rinnai

The new high-efficiency RCB-Series wall-hung commercial condensing boiler delivers reliable, energy-saving performance, the company says. The RCB-Series features a stainless-steel water tube heat exchanger and 97% thermal efficiency to maximize productivity within a compact design. The superior premix burner performance reduces greenhouse gas emissions and increases turndown ratio — set at 10:1 for precise load tracking and energy savings. The RCB-Series is easy to program, access and monitor performance data onsite or with new connectivity features. Multiple boiler configurations can be accommodated with the Integrated Cascade Logic — which distributes runtimes equally for optimal application diversity.

Rinnai | www.rinnai.us

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#15 Ranking icon

Bell & Gossett packaged booster system

PM Engineer's Top 20 Products of 2023: #15 Bell & Gossett packaged booster system

Image courtesy of Bell & Gossett

Bell & Gossett’s newest TECHNOFORCE e-MTV Packaged System offers standout efficiency from installation to operation, all while delivering overall lower costs, the company says. Built to maintain a constant clean water delivery pressure, the e-MTV is a prefabricated solution that arrives ready to install for easy integration, saving time and labor. A variety of fixed-SKU options all feature e-SV stainless steel vertical multistage pumps, capable of flows up to 950 gpm. Pre-configured for two to three pump configurations, the system features 208-230V 460, 575 volt premium efficient motors, 304 stainless steel grooved manifolds, UL type 1 control panel, 7” color touchscreen interface and more.

Bell & Gossett | www.xylem.com/en-us/brands/bell-gossett

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#14 Ranking icon

LG VRF system

PM Engineer's Top 20 Products of 2023: #14 LG VRF system

Image courtesy of LG

Multi V i is a wholly redesigned, innovative, intelligent, and interactive variable refrigerant flow (VRF) all-electric cooling and heating system. Multi V i includes many specifications and new features, including an A.I. Engine, Edge computing architecture, real-time weather-based control and remote software and firmware upgradability. Multi V i has a single refrigerant circuit that connects many indoor units to one outdoor unit. It provides options to maximize energy efficiency while minimizing operational costs for a wide range of commercial applications. The Multi V i’s capacity capabilities range from 6 to 44 tons in single and dual frame modular configurations, offering engineers and building owners flexibility in performance and design. LG’s Multi V i features an inverter compressor that improves energy efficiency and enhances compressor reliability.

LG | www.lg.com

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#13 Ranking icon

Lync C02 heat pump water heater

PM Engineer's Top 20 Products of 2023: #13 Lync C02 heat pump water heater

Image courtesy of Lync by WATTS

Powered by natural refrigerant R744, better known as refrigerant-grade CO2, Lync’s Aegis commercial heat pump is non-toxic, non-flammable, has an ODP (Ozone Depletion Potential) of zero and a low GWP (Global Warming Potential) of 1. R744 also outperforms other common refrigerants, like R134a and R410a, making Aegis a better, longer-lasting and more sustainable solution. Aegis is available in an air-source version, water-source version, and an air-source version with a cool water recovery option. It is an ideal solution for new and retrofit, multifamily, gyms, industrial, hospitality, education and health care, the company says.

Lync | www.lyncbywatts.com

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#12 Ranking icon

REHAU CPVC and copper press adapters

PM Engineer's Top 20 Products of 2023: #12 REHAU CPVC and copper press adapters

Image courtesy of REHAU

REHAU announces the addition of CPVC and copper press adapters to their proprietary EVERLOC+ compression-sleeve fitting system, allowing efficient transitions between piping materials. The product line extension includes 12 CPVC adapters with six socket and six spigot configurations and seven copper press male adapters, all available in 1/2 to 2 in. sizes. Designed for use with RAUPEX crosslinked polyethylene (PEXa) pipe in potable and non-potable applications, the new CPVC and copper press adapters extend the installation speed and reliability of EVERLOC+ further into commercial construction.

REHAU | www.rehau.com

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#11 Ranking icon

Lochinvar commercial heat pump water heater

PM Engineer's Top 20 Products of 2023: #11 Lochinvar commercial heat pump water heater

Image courtesy of Lochinvar

The Veritus Heat Pump Water Heater (HPWH) serves as a sustainable option providing energy savings and reliable domestic hot water for a wide variety of commercial applications. ECM pumps, fans and a scroll compressor work together to enable Veritus to operate with a high COP, optimize heat transfer and minimize emissions. To provide improved installation flexibility, Veritus heat pumps are modular, meaning units can be manifolded together — ensuring ample hot water supply, built-in redundancy and capacity matching for larger commercial water heater demands. The Veritus utilizes a low GWP refrigerant (R513A). When paired with Lochinvar’s Thermal-Stor storage tank, the tank’s patent-pending baffle ensures the system performs optimally by controlling the stratification of hot water as it’s stored, enhancing overall system performance.

Lochinvar | www.lochinvar.com

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#10 Ranking icon

Bell & Gossett gasketed plate and frame heat exchanger

PM Engineer's Top 20 Products of 2023: #10 Bell & Gossett gasketed plate and frame heat exchanger

Image courtesy of Bell & Gossett

Bell & Gossett launched new gasketed plate and frame heat exchangers GPX P45, P55, P86 and P110. Engineered for efficiency, “X” plate technology increases heat transfer thermal performance up to 20%, reduces surface area up to 20% and reduces materials up to 15%, the company says. Through advanced plate design and superior heat transfer characteristics, this new offering meets a critical need for the growing demand in modern HVAC applications. Standard options include a variety of high-efficiency plate corrugations, material options of 304SS, 316SS or titanium plates, and nitrile or EPDM gaskets. GPX models.

Bell & Gossett | www.xylem.com/en-us/brands/bell-gossett

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#9 Ranking icon

Lochinvar floor mount combi-boiler

PM Engineer's Top 20 Products of 2023: #9 Lochinvar floor mount combi-boiler

Image courtesy of Lochinvar

The NOBLE floor mount fire tube combi-boiler brings to market a brand new floor mount boiler option for homeowners and multi-family facilities with models ranging from 110,000 to 199,000 Btu/h. Homeowners can be assured that their home’s domestic hot water demand will be met with ease and in a timely manner thanks to the NOBLE Floor Mount’s 10:1 turndown ratio and incredible thermal efficiency rate of 95%.

Lochinvar | www.lochinvar.com

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#8 Ranking icon

Intellihot commercial tankless heat pump water heater

PM Engineer's Top 20 Products of 2023: #8 Intellihot commercial tankless heat pump water heater

Image courtesy of Intellihot

The Electron electric tankless heat pump water heater for commercial use runs on electricity and heats water from energy stored in a thermal battery. It produces clean, healthy and efficient hot water without storage while providing the utmost reliability. The heat pump design uses CO2-based refrigerant with a GWP of 1 and a cost-effective grid connection, which enables the unit to run when it’s most cost-effective and efficient maximizing ROA for the owner.

Intellihot | www.intellihot.com

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#7 Ranking icon

Taco Comfort Solutions’ air-to-water heat pump system

PM Engineer's Top 20 Products of 2023: #7 Taco Comfort Solutions’ air-to-water heat pump system

Image courtesy of Taco Comfort Solutions

The ultra-efficient System M consists of a sleek, whisper-quiet, inverter-driven outdoor heat pump that can be up to 4 times more efficient than a gas furnace, the company says. A true plug-and-play appliance, its packaged design makes installation less intrusive; no refrigerant or gas lines are needed. System M seamlessly integrates with almost any high-efficiency heating and cooling system and is perfect for both new construction and existing HVAC systems. The installation time is half of a typical air-to-water heat pump by eliminating the work to design, procurement and installation of all the required hydronic components. Just 6 connections needed; 2 connections to the heat pump, 2 connections to the domestic hot water tank (DHW) and 2 connections to the heat and cooling system.

Taco Comfort Solutions | www.tacocomfort.com

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#6 Ranking icon

HTP gas-fired water heater

PM Engineer's Top 20 Products of 2023: #6 HTP gas-fired water heater

Image courtesy of HTP

HTP Phoenix is an efficient and versatile gas-fired water heater that is manufactured with super durable stainless-steel materials to last longer and provide optimum heat transfer. The Phoenix offers up to 96% thermal efficiency and a 5 to 1 turndown ratio. The unit is laser welded and constructed with a 316L stainless steel tank to resist corrosion and includes a heat exchanger that eliminates scale build-up and promotes self-cleaning, the company states.

HTP | www.htproducts.com

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#5 Ranking icon

METUS cold-climate heat pump

PM Engineer's Top 20 Products of 2023: #5 METUS cold-climate heat pump

Image courtesy of METUS

The MUZ-FS H2i plus heat pump from Mitsubishi Electric keeps homes warm and cozy in the winter and cool in the summer. This cold-climate heat pump provides 100% heating capacity at -5° F and energy-efficient cooling in the summer. The product also features Dual Barrier Coating, which prevents dust, particles and oils from building up, resulting in reduced maintenance, increased efficiency and cleaner airflow.

METUS | www.metahvac.com

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#4 Ranking icon

Webstone space-saving boiler vent valve

PM Engineer's Top 20 Products of 2023: #4 Webstone space-saving boiler vent valve

Image courtesy of Webstone

Webstone, a brand of NIBCO, announced a new patent-pending Boiler Vent Valve. This space-saving valve expands the utility of a boiler’s existing 3/4" pressure relief valve (PRV) port, capitalizing on its location at the top of the unit as the ideal placement for an air vent and other accessories. Its automatic air vent can be isolated for service, allowing the PRV (included with the boiler or sold separately) to operate unobstructed. Plugged FIP ports accommodate the installation of a low-water cut-off device and/or pressure gauge if so desired.

Webstone | www.webstonevalves.com

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#3 Ranking icon

PVI domestic water hearer

PM Engineer's Top 20 Products of 2023: #3 PVI domestic water hearer

Image courtesy of PVI

PVI, a Watts brand, expands its Centurion family of compact, direct-fired domestic water heaters with the addition of a 1600 MBH model to complement its existing 2000 MBH size. With the new size, plumbing contractors have even more options to right-size their water heating systems, creating additional efficiency benefits to commercial applications. Centurion water heaters deliver up to 99% thermal efficiency and offers O2 Trim, which allows the unit to self-adjust and maintain optimal air/fuel rations for peak efficiency, as well as low emissions and maximum uptime reliability. The compact Centurion occupies up to 65% less footprint than competing models. Its small size allows the water heater to fit through a standard doorway and in most freight elevators.

PVI | www.pvi.com

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#2 Ranking icon

Caleffi adjustable thermal balancing valve

PM Engineer's Top 20 Products of 2023: #2 Caleffi adjustable thermal balancing valve

Image courtesy of Caleffi

Caleffi North America’s ThermoSetter is an adjustable thermal balancing valve. The ThermoSetter automatically maintains recirculation temperature at fixtures by modulating flow rate within each circuit. No tools are required when commissioning or troubleshooting.

Caleffi | www.caleffi.com

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#1 Ranking icon

Daikin Applied heat pump chiller

PM Engineer's Top 20 Products of 2023: #1 Daikin Applied heat pump chiller

Image courtesy of Daikin Applied

The Trailblazer HP is an air-cooled scroll chiller that uses heat pump technology to deliver electricity-powered heating and cooling for commercial buildings and industrial processes. The air-to-water heat pump chiller provides a reversing function that allows the chiller to switch between cooling and heating modes based on the temperature requirements of the space or process being conditioned. In a cooling application, the refrigeration cycle allows for heat removal from the internal space, dissipating excess heat into the external air. In heating mode, the refrigeration cycle reverses and transfers heat absorbed from the outside air into the internal space or process. The chiller is up to 300% efficient at typical operating conditions, which means it can transfer three times more heat than the energy used by the equipment. That leads to a significant reduction in energy use and direct greenhouse gas emissions, as well as day-to-day operating costs, the company says.

Daikin Applied | www.daikinapplied.com

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