A Simpler Way to Upgrade Heating and Cooling and make Older Buildings Have A New Feel

Upgrading heating and cooling systems in older buildings has always been difficult, especially in places where many properties still rely on outdated steam or radiator systems. These systems are costly to maintain, uncomfortable for residents, and offer little individual control.

A recent industry spotlight from the Air Conditioning Contractors of America (ACCA) highlights a major breakthrough: the Midea Packaged Window Heat Pump (PWHP) and its first full-building retrofit in New York City. This project proves that modern, all-electric comfort is now possible, especially in buildings that were never designed for it.

The New York City Housing Authority (NYCHA) recently completed the first full-building retrofit using Midea PWHP units at Woodside Houses in Queens. What started as a small pilot quickly became a large-scale success:

• Energy use dropped dramatically by 87%.
• Residents gained better comfort and control.
• The building was fully electrified without major construction.

Following these results, NYCHA plans to install thousands more units across its housing portfolio.

At National Efficiency Supply, we see this technology as a transformational retrofit tool. The Midea PWHP is a compact heating and cooling system that installs directly into an existing window. That simple design removes many of the traditional barriers to retrofitting older buildings.

Key technical advantages reported by ACCA include:

Installs in existing windows with no wall cutting or ductwork.

Plugs into a standard outlet, avoiding major electrical upgrades.

Provides both heating and cooling, even in cold climates.

Operates quietly, improving resident comfort.

Works unit by unit, giving occupants control over their own space.

Because installation is fast and non-invasive, upgrades can be completed without displacing tenants which is a major advantage for occupied and historic buildings.

These features together enabled the New York City Housing Authority (NYCHA) pilot and full-building retrofit programs described by ACCA proving that all-electric, high-performance heating and cooling can be practical in buildings never designed for modern HVAC.

Technology alone doesn’t guarantee success. The right partner makes the difference. We help building owners move from interest to real results by managing the entire process:

• Evaluating whether the PWHP is a good fit for your building.
• Supplying the right equipment at the right scale by designing and managing small pilot deployments so property owners see real energy, comfort, and noise outcomes before scaling.
• Coordinating smooth, low-disruption installations that are occupant-friendly.
• Helping identify rebates and cost-saving opportunities.
• Supporting long-term performance and resident satisfaction.

Our role is to simplify the transition so that you gain the benefits without the headaches and here’s what clients can expect;

1. Initial consultation & site survey: electrical and window assessments; project scope.
2. Pilot deployment depending on portfolio size.
3. Performance review & scale plan- energy, comfort, and tenant feedback evaluation.
4. Procurement & logistics - staging and delivery planning.
5. Phased installation - tenant-friendly scheduling, commissioning, and quality analysis.
6. Post-installation support-maintenance, rebates, and performance monitoring.

The Midea Packaged Window Heat Pump is changing what’s possible for older buildings. With the right approach and the right partner, property owners can deliver modern comfort, lower energy use, and a better living experience for residents.

National Efficiency Supply is ready to help you take that next step.