High Performance Heat Pumps Are Here

By Joe Kalina, Sales Engineer, Gil-Bar Industries

The Future of NYC HVAC Design

The commercial HVAC landscape is changing rapidly. Between electrification mandates, rising energy costs, and the push for carbon reduction in major markets like NYC, engineers and building owners are rethinking how heating and cooling systems are designed. High-performance heat pumps are no longer a niche solution — they are becoming the foundation of the modern heat pump system strategy for commercial buildings.

Today’s advanced systems go far beyond traditional split system heat pumps. With inverter-driven compressors, expanded operating envelopes, and integrated smart controls, these systems deliver highly efficient heating and cooling performance throughout the year. Designed for both new construction and retrofit applications, modern heat pumps can operate year-round — maintaining comfort in extreme winter conditions while optimizing cooling efficiency in the summer. High-performance heat pumps can even reduce energy bills by 20%–40%.

High efficiency metrics such as seasonal energy efficiency ratio (SEER), IPLV, and COP are no longer secondary considerations; they directly impact operating budgets and long-term sustainability goals. As building owners evaluate alternatives to dual-fuel systems and fossil-fuel-based boilers, high-performance heat pumps are proving capable of delivering reliable heating even in cold-climate environments.

For engineers navigating decarbonization goals and Local Law 97 compliance, the question is no longer whether heat pump technology is viable — it’s how to specify the right system for measurable performance gains. Choosing the right size heat pump system depends on your building’s square footage, insulation quality, and climate zone, and many high-efficiency heat pumps may qualify for local or federal energy rebates and tax credits, helping property owner’s save money.

The Future of NYC HVAC Design

As an engineer and salesperson, I am always on the lookout for new solutions that work for both our customers and the environment. Recently, I’ve gotten excited about the new YMAE Air-to-Water Inverter Scroll Modular Heat Pump launched by York.

The New York City market has been asking for a product like this for the past five years. With electrification and decarbonization changing the landscape of HVAC design, this product will help in accomplishing the aggressive carbon-neutral goals of Local Law 97. 

A leap in development from the 2021 ACR Awards Heat Pump Product of the Year, the new YMAE-130 produces 140 °F hot water at the highest COP in the category. It also promises to deliver the broadest operating envelope in the market, and that means maximum flexibility across different applications. Combined with the use of ultra-low GWP refrigerant, R-454b, the YMAE is a sustainable, high-performance solution for building owners and engineers wanting to minimize their environmental impact.

So What Are The Specs?

• Inverter vapor injection compressors on both circuits as standard (individually circuited compressors under 15HP) and ECM condenser fans. Part load turndown to 10% of design capacity.
• 2-Pipe (heating or cooling mode) and 4-Pipe (simultaneous heating and cooling mode)
• 4-Pipe operation is not solely reliant on energy recovery from internal loads – the condenser will aid in maintaining both chilled water and hot water LWT setpoints as needed, with both setpoints individually controlled. This allows for a wide range of new construction and retrofit applications.
• Modular flexibility with up to 4 modules factory packaged on a skid with single-point power. Up to 32 modules can be controlled as a single chiller bank.
• R454B next-generation low-GWP refrigerant, allowing for shipment after the 2023/2024 chiller HFC refrigerant ban.
• Condenser fan external static pressure capabilities up to 0.4”, allowing for indoor installations behind louvers.
• Capacity per 4-pipe module at AHRI conditions:
  • 35 tons cooling capacity @ 44°F water
  • 546 MBH heating capacity @ 105°F water
• Combined COP of 7.9
• Cooling operation IPLV greater than 20
• Achieves 131°F @ 5°F
• Maximum 140°F @ 14°F
• Ideally suited to reduce the environmental impact of schools, hotels, offices, hospitals, and multi-unit residential applications by replacing fossil fuel boilers with high-performance heat pump technology.

Gil-Bar is excited to add the YMAE to its extensive air source heat pump portfolio with its groundbreaking new technology. Delivering heating capacities and efficiencies at design conditions is something the NYC market has needed in a modular package, and now it’s here.

Understanding High Performance Heat Pump Technology

High-performance air-to-water heat pumps represent a major shift in commercial HVAC design. Unlike conventional heat pumps that struggle at lower ambient temperatures or require supplemental fossil fuel heat, modern inverter-driven systems are engineered to maintain capacity and efficiency across an expanded operating envelope.

The use of inverter vapor injection scroll compressors allows the system to dynamically adjust output based on real-time load conditions. Instead of cycling on and off like traditional fixed-speed systems, inverter technology continuously modulates capacity. High efficiency inverter heat pumps are designed to maintain consistent temperatures and reduce energy costs compared to traditional units, and can efficiently heat down to -22°F and cool up to 129°F. This results in:

• Higher part-load efficiency
• Reduced mechanical stress
• Improved temperature control
• Lower operating costs
• Extended equipment life

For NYC building owners navigating electrification mandates and Local Law 97 compliance, this level of control is no longer a luxury — it’s a requirement.

To ensure the highest efficiencies from a heat pump system based on site characteristics and intended use, consult a qualified installer or contractor.

System Configurations: 2-Pipe vs. 4-Pipe Applications

High-performance heat pumps provide flexibility that older chiller/boiler systems simply cannot match.

In addition to split system heat pumps, other configurations, such as mini split systems, are available. Mini splits use individual indoor units connected directly to an outdoor condenser, making them ideal for spaces without existing ductwork.

Heat pumps can also provide heating through ductless systems, offering efficient and versatile solutions for zone heating and various building heating applications. Air-to-water heat pumps provide heating via hot water through radiant floors or radiators, though they do not offer cooling.

There are two main types of heat pumps connected by ductwork: air-to-air and ground-source (geothermal) systems.

2-Pipe Configuration

In 2-pipe mode, the system operates in either heating or cooling. This is ideal for buildings with seasonal changeover requirements, such as:

• Schools
• Office buildings
• Residential properties with central plant systems

The inverter-driven design ensures efficient load matching during shoulder seasons when partial heating or cooling is required.

4-Pipe Configuration (Simultaneous Heating & Cooling)

The real innovation lies in 4-pipe operation. Simultaneous heating and cooling allows buildings with diverse internal loads to:

• Maintain chilled water setpoints
• Maintain hot water setpoints
• Recover energy internally when possible
• Supplement with condenser operation as needed

In dense NYC commercial properties — particularly healthcare, hospitality, and mixed-use developments — simultaneous heating and cooling is critical. Interior zones may require cooling while perimeter zones demand heating. A high-performance modular heat pump allows this to occur without reliance on fossil fuel boilers.

This opens significant opportunities in retrofit applications where decarbonization must occur without compromising occupant comfort.

Cold-Climate Performance: Built for Northeast Conditions

One of the primary concerns with electrification in the Northeast is cold-weather heating performance.

Traditional air-source heat pumps lose capacity as outdoor temperatures drop. In dual fuel systems, when outdoor temperatures fall below the heat pump’s effective range, the furnace takes over to provide heat, ensuring consistent warmth even in colder weather. High-performance models with vapor injection technology maintain a stable hot water supply temperature even at low ambient conditions.

With capabilities such as:

• 131°F supply water at 5°F ambient
• 140°F supply water at 14°F ambient

These systems can directly replace or significantly reduce reliance on boiler systems in many commercial applications.

For engineers designing in the NYC Metro, this expanded envelope reduces the need for complex hybrid systems or oversized backup heat. It simplifies plant design while maintaining reliability during winter design days.

Efficiency Metrics That Matter

When evaluating high-performance heat pumps, efficiency is more than a marketing term. The metrics matter.

COP (Coefficient of Performance)

A combined COP approaching 7.9 at AHRI conditions indicates that the system produces nearly eight units of heating energy for every unit of electrical input under rated conditions. This is a substantial improvement over legacy heating systems.

IPLV (Integrated Part Load Value)

With cooling IPLV values exceeding 20, part-load performance is exceptional. Since commercial systems operate at part load the majority of the year, IPLV is often more relevant than full-load ratings.

Part Load Turndown

A turndown capability to 10% of design capacity is particularly important for modular central plants. This allows:

• Reduced short cycling
• Improved seasonal efficiency
• Greater redundancy
• Optimized staging across multiple modules

For building owners, this translates directly to lower energy consumption and improved lifecycle economics.

AC System Components: What Makes Up a High-Performance Heat Pump?

A high-performance heat pump system is engineered for both efficiency and comfort, thanks to a combination of advanced components working in harmony. At the heart of the system is the outdoor unit, or condenser, which houses the compressor, fan, and condenser coil. This is where the heat exchange process begins, allowing the system to efficiently transfer heat between the inside and outside of your building.

Inside, the air handler (or indoor unit) contains a fan, coil, and expansion valve, all designed to distribute heated or cooled air throughout the space. The refrigerant circulates between the indoor and outdoor units, absorbing and releasing heat as needed to maintain the desired temperature. The compressor, often featuring inverter technology and variable speed operation, dynamically adjusts its output to match real-time heating and cooling demands. This not only maximizes energy efficiency but also ensures consistent comfort by minimizing temperature swings and reducing energy waste.

Smart controls and programmable thermostats further enhance the system’s performance, allowing for precise temperature regulation and integration with building automation systems. These features enable the heat pump system to respond intelligently to changing conditions, optimizing both efficiency and comfort. Variable speed compressors and fans contribute to quieter operation, improved humidity control, and lower energy consumption, making high efficiency heat pumps a top choice for those seeking efficient heating and cooling year-round.

By leveraging these advanced components, a high-efficiency heat pump system delivers reliable, efficient heating and cooling, helping building owners and engineers maximize energy efficiency and reduce operating costs.

Dual Fuel Systems: Expanding Flexibility and Resilience

Dual fuel systems offer a powerful solution for maximizing energy efficiency and comfort in a wide range of climates. By combining a heat pump with a gas furnace, these systems provide the flexibility to automatically switch between electric and gas heating based on outdoor temperatures and energy costs. In milder weather, the heat pump delivers highly efficient heating and cooling, taking advantage of its ability to efficiently cool and heat your space. When outdoor temperatures drop and demand for heating increases, the gas furnace seamlessly takes over, ensuring reliable heating even during the coldest months.

This hybrid approach allows dual fuel systems to deliver significant energy savings and cost reductions, as the system always operates in the most efficient mode for current conditions. In warmer climates, the heat pump can handle the majority of heating and cooling needs, while in colder regions, the gas furnace provides backup for those extreme winter days. Proper sizing and installation are essential to ensure the system operates at peak efficiency, providing consistent comfort and optimal humidity control throughout the year.

Dual fuel systems can be configured as a split system, with the heat pump and furnace working together or independently, depending on the building’s needs. This versatility makes them an excellent choice for both new construction and retrofits, especially when existing ductwork is in place. Additionally, many dual fuel systems qualify for energy rebates and tax credits, further enhancing their cost savings and making them an attractive option for building owners looking to upgrade their heating and cooling systems.

By integrating the strengths of both electric and gas heating, dual fuel systems deliver efficient heating and cooling, improved indoor air quality, and the resilience needed to handle fluctuating outdoor temperatures—all while helping you save energy and money.

Real-World Commercial Applications

High-performance modular heat pumps are well-suited to several NYC building typologies. The age, design, and construction quality of a building can significantly impact the energy efficiency and performance of heat pump systems, making building construction an important consideration when planning upgrades.

In addition, heat pumps do not create combustion byproducts, which helps improve indoor air quality.

Schools

Electrification initiatives across public and private education facilities demand low-carbon heating solutions. Modular systems allow phased retrofits without full plant shutdowns.

Hospitals and Healthcare Facilities

Critical environments require precise temperature control and redundancy. Simultaneous heating and cooling ensures domestic hot water production while meeting cooling loads in imaging suites and data rooms.

Hotels

Hospitality properties have continuous domestic hot water demand combined with varying guest room loads. Heat pumps capable of maintaining elevated leaving water temperatures are ideal for these applications.

Office and Mixed-Use Buildings

Decarbonization retrofits in Class A office buildings must balance tenant comfort, sustainability goals, and operating costs. Modular air-to-water heat pumps provide scalable solutions that integrate with existing hydronic infrastructure.

Multi-Family Residential

Replacing central boilers in residential towers can significantly reduce carbon emissions while improving energy efficiency. Modular configurations allow staged installation with minimal disruption to occupants.

Integration With Modern Building Systems

High-performance heat pumps are most effective when paired with advanced controls and building automation systems. The ability to coordinate:

• Load sequencing
• Demand response participation
• Energy recovery strategies
• Central plant optimization

Gil-Bar’s engineering team supports proper application, plant layout design, and controls integration to ensure systems perform as modeled — not just as specified.

Supporting NYC’s Electrification Transition

Electrification is no longer theoretical. With Local Law 97 enforcement and increasing utility incentives tied to decarbonization, building owners must evaluate alternatives to fossil fuel heating.

High-performance air-to-water heat pumps provide:

• Reduced carbon intensity
• Compliance pathway for emissions caps
• Lower long-term operating costs
• Elimination of on-site combustion
• Compatibility with renewable energy sources

For engineers and owners planning capital improvements over the next decade, specifying scalable, modular heat pump solutions today prevents costly redesigns tomorrow.

Gil-Bar’s Role in Next-Generation Heat Pump Solutions

Selecting the right equipment is only part of the equation. Proper application, design support, commissioning guidance, and post-installation service determine long-term success.

As NYC Metro’s expert on York products and part of the Ambient HVAC Collective, Gil-Bar provides:

• Engineering consultation during design development
• Equipment selection and specification support
• Application review for retrofit and new construction
• Coordination with contractors and controls providers
• Ongoing service and technical expertise

High-performance heat pumps are here — but maximizing their potential requires the right partner. Contact Gil-Bar to discuss your property needs.

Joe Kalina is a sales engineer at Gil-Bar Industries. Part of the Ambient HVAC Collective, Gil-Bar has been the HVAC solutions company that offers greater expertise and commitment than any other firm, and is NYC Metro’s expert on York products and solutions.