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Heat Pumps vs. Boilers: The Efficiency Reality for NYC Commercial Buildings | Denair HVAC
Energy Efficiency & LL97 Compliance

Heat Pumps vs. Boilers:
The Efficiency Reality

Multi-year field data confirms what leading engineers already know — heat pumps deliver up to 4× the efficiency of gas and oil boilers. Here's what NYC facility managers need to act on now.

By Denair HVAC Published January 30, 2026 Category Energy Management Read time ~6 min

France's Environment and Energy Management Agency (ADEME) recently published findings from a multi-year, real-world study tracking heat pump performance across single-family homes. These weren't controlled lab environments — they were operational systems, installed to replace existing gas and oil boilers, monitored across full heating seasons. The results have direct implications for every NYC facility manager weighing a heating system decision.

3× Average efficiency of air-to-water heat pumps vs. boilers (SCOP)
4× Efficiency of geothermal water-to-water systems vs. boilers
30% Energy cost reduction Denair clients achieve via advanced automation

What the Data Actually Shows

The ADEME study results were unambiguous. Air-to-water heat pumps averaged nearly 3× the efficiency of gas boilers. Geothermal water-to-water systems exceeded 4×. Even air-to-air systems consistently outperformed combustion-based heating across all conditions tested.

Efficiency was measured using the Seasonal Coefficient of Performance (SCOP) — a real-world benchmark across a full heating season, not a peak-condition snapshot.

System TypeSCOP RangeRelative Efficiencyvs. High-Efficiency Boiler
Air-to-Water Heat Pump
~3.0
Very High≈3× more efficient
Geothermal (Water-to-Water)
>4.0
Highest≈4× more efficient
Air-to-Air Heat Pump
2.5–3.0
High>2× more efficient
High-Efficiency Gas Boiler
≤1.0
Baseline—
Key Insight

A SCOP of 3 means the system delivers three units of heat for every one unit of electricity consumed. Heat pumps don't generate heat — they move it. That fundamental difference is why no combustion system can match their efficiency ceiling.

Why Europe Moved First — And Why the U.S. Is Catching Up Fast

France, like most of the EU, operates under aggressive carbon-reduction mandates. Buildings account for a significant share of national emissions, and electrified heating is one of the highest-leverage interventions available. Heat pumps delivered on both fronts: lower emissions and lower long-term energy costs.

But this is no longer an overseas trend. The U.S. market data tells the same story.

U.S. Market — Current State
1/3
of American homes already use a heat pump
40%+
of U.S. households use electricity as primary heating source
~50%
of new and replacement heating systems installed are heat pumps
↑
Heat pump shipments now outpace gas and oil furnaces nationally

Even in multifamily buildings — historically considered among the most difficult property types to decarbonize — new heat pump technologies are proving both practical and economically sound. The market has already shifted. The conversation in NYC is simply catching up.

"The market has already shifted. The conversation is just catching up."

— ADEME Multi-Year Heat Pump Study, 2025

What's Still Holding Heat Pump Adoption Back?

Despite compelling data, adoption isn't universal. For facility managers in NYC navigating capital planning and LL97 compliance, three barriers tend to recur:

Barrier 01
Outdated Perceptions

Cold-climate performance concerns and noise complaints linger — but both reflect older technology. Modern cold-climate heat pumps are engineered precisely for conditions like New York winters.

Barrier 02
Improper Design & Installation

Underperforming systems almost always trace back to poor sizing or installation errors — not technology limitations. Heat pumps require precision engineering, not a shortcut approach.

Barrier 03
Desire for Optionality

Some properties still have valid use cases for gas. The right answer depends on the building's load profile, infrastructure, and compliance position — not a blanket policy.

At Denair HVAC, this is something we navigate with facility managers across Brooklyn, Manhattan, Queens, The Bronx, and Staten Island every day. The technology performs when it's properly designed, correctly installed, and clearly explained.

The LL97 Connection NYC Can't Ignore

LL97 Compliance

Local Law 97 imposes escalating carbon penalties on buildings over 25,000 sq ft. Fines increase significantly in 2030. Transitioning from gas or oil boilers to high-efficiency heat pump systems is one of the most direct paths to reducing a building's carbon intensity — and avoiding six-figure annual penalties.

Denair works with building owners and facility managers to assess current carbon exposure, model heat pump retrofit scenarios, and identify available ConEd and NYSERDA incentive programs that offset capital costs. The question isn't whether to act — it's how to sequence the investment to maximize both compliance and long-term operational savings.

The Bottom Line for NYC Facility Managers

Heat pumps are not experimental technology. They are proven, increasingly mainstream, and — when designed by experienced commercial engineers — deliver on the three outcomes facility managers care about most: comfort, reliability, and long-term savings.

This isn't about banning boilers or forcing a single solution onto every building. It's about recognizing that the efficiency gap between heat pumps and combustion systems is real, documented, and growing harder to ignore — especially as LL97 penalties escalate.

Whether your building is weighing a full heating system replacement, a phased retrofit, or simply needs a clear-eyed assessment of your LL97 exposure, Denair brings the engineering depth and NYC-specific expertise to help you move forward with confidence.

Questions Facility Managers Ask Us

Yes. A multi-year study by France's ADEME found air-to-water heat pumps average nearly 3× the efficiency of gas boilers (measured by Seasonal Coefficient of Performance). Geothermal systems exceed 4×. Heat pumps move heat rather than generate it — which is why no combustion system can match their efficiency ceiling.
Yes. Modern cold-climate heat pumps — including authorized Daikin, Mitsubishi Electric, and LG VRF/VRV systems that Denair installs — are specifically engineered for sub-freezing temperatures. Performance concerns are rooted in older technology. Properly designed and sized systems perform reliably through New York winters.
Local Law 97 penalizes buildings over 25,000 sq ft for carbon emissions above set thresholds, with fines escalating significantly in 2030. Replacing gas or oil boilers with electric heat pumps directly reduces a building's carbon intensity. Combined with automation and controls upgrades, Denair clients have achieved 30% reductions in energy costs.
SCOP stands for Seasonal Coefficient of Performance. It measures how many units of heat a system produces per unit of electricity consumed over a full heating season — a real-world benchmark, not a peak-condition snapshot. A SCOP of 3 means 3 units of heat for every 1 unit of electricity. No combustion-based system achieves this ratio.
Yes. Denair HVAC installs, commissions, and services commercial heat pump systems — including factory-certified Daikin, Mitsubishi Electric, and LG VRF/VRV installations — across Brooklyn, Manhattan, Queens, The Bronx, and Staten Island. Call (212) 776-1333 or visit DenairHVAC.com to schedule a consultation.
Yes. ConEd and NYSERDA both offer incentive programs for commercial building electrification and energy efficiency upgrades. Denair identifies and navigates these programs as part of the project planning process, helping offset capital costs and accelerate return on investment.
Ready to Move Forward?

Talk to a Commercial HVAC Engineer

Whether you're assessing LL97 exposure, planning a heat pump retrofit, or evaluating long-term energy strategy — Denair brings the engineering depth NYC buildings require.

Schedule a Consultation (212) 776-1333