Here are 5 vital things you need to know about heat pumps
Electrek spoke with Heidi Gehring, associate director, cooling product marketing at Carrier HVAC, about the five essential things to know about this energy-efficient, cost-effective way to heat and cool a home.
Electrek: What’s a heat pump and how does it work?
Heidi Gehring: A heat pump is often mistaken for an air conditioner at first glance. What makes it different from an air conditioner is that it can both heat and cool your home using electricity and refrigerant.
In cooler months, heat is pulled from the outdoor air and transferred indoors; in warmer months, the system pulls heat out of the indoor air. Heat pumps have both an indoor and outdoor component. Each unit contains a fan and coil that operates either as a condenser (in cooling mode) or an evaporator (in heating mode). The fan moves the air across the coil and throughout the ducts in the home.
Electrek: Do heat pumps save you money, and what kinds of cost savings can be expected?
Heidi Gehring: Because heat pumps are more energy efficient, they can save you money on your heating and cooling bills. Your savings will vary based on the model you select.
Heat pumps are rated by their Heating Seasonal Performance Factor (HSPF2) – which is a measure of a heat pump’s overall energy efficiency during the heating season – their Seasonal Energy Efficiency Ratio (SEER2), and their Energy Efficiency Ratio (EER2). The higher the rating, the more energy-efficient the system.
Additionally, the US government’s Inflation Reduction Act of 2022 includes incentives for the installation of high-efficiency home heating and cooling products, including up to a $2,000 tax credit for high-efficiency heat pumps and up to 30% for geothermal heat pump systems placed in service between 2022 and 2032. Look into local and state programs, too, as many utilities and local governments offer heat pump rebates.
Electrek: Why is a heat pump better for the environment?
Heidi Gehring: Heat pumps rely on electricity rather than fossil fuels, making them a much greener choice. Improvements in technology in recent years also mean that heat pumps are more efficient than ever, requiring less electricity than older heaters, furnaces, and air conditioners.
Geothermal heat pumps are also available – they pull energy directly from the earth to heat or cool your home and can result in up to 70% savings on your energy bill.
Electrek: What features should you consider when comparing different models?
Heidi Gehring: Heat pumps vary in the number of stages or speeds they offer. Different speeds or stages can affect your comfort and the consistency of indoor temperature. Humidity plays a major role but is often overlooked. Two-stage and variable-speed offer better control because they operate for a longer period of time at lower speeds and use less energy. These pull more humidity out of the air than models with a single-stage compressor.
Variable-speed and two-stage models are generally quieter than single-stage models, and because they run longer, that means the air is run through the filter more, so it has less chance of becoming stagnant.
Electrek: When is the best time of year to install a heat pump?
Heidi Gehring: Usually in the spring or fall. During the coldest winter months and hottest summer months, demand for systems and technicians increases, so you may experience longer wait times and higher prices. Make sure you hire a professional. HVAC systems of any kind require expert knowledge for installation and are not a good DIY project.
If you’re switching from a traditional HVAC system to a heat pump, you may also need electrical upgrades. A professional HVAC installer can help you with that as well.
Read more: This award-winning apartment heat pump can fit under a kitchen sink
Photo: Carrier HVAC
Heidi Gehring is the associate director, cooling product marketing at Carrier HVAC. She joined Bryant in 2017 as the quality manager for warranty, data analytics, and field service technology. In 2019, she moved into product marketing. She holds a bachelor’s degree in industrial and systems engineering from the University of Wisconsin Madison and an MBA from Purdue Global.
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Paris’ bike-share system, Vélib has long been considered one of the shining success stories of urban micromobility. With a massive fleet of over 20,000 pedal and electric-assist bicycles around Paris, the service has helped millions of residents and tourists get around the City of Light without needing a car or scooter. But lately, a growing problem is threatening to knock the wheels off this urban mobility marvel: theft and joyriding.
According to city officials and the service operator, more than 600 Vélib bikes are now going missing every single week. That’s over 30 bikes a day simply vanishing from the system – some stolen outright, others taken on “joy rides” and never returned.
“At the moment we’re missing 3,000 bikes,” explained Sylvain Raifaud, head of the Agemob company that currently operates the Velib system. That’s nearly 15% of over 20,000 Vélib bikes across Paris.
The sticky-fingered culprits aren’t necessarily professional thieves or organized crime rings. Instead, they’re often regular users who treat the shared bikes like disposable toys.
The city estimates that many people have figured out how to pry the bikes out of the system’s parking docks, unlocking one for a casual cruise and then ditching it somewhere far from a docking station.
Once pried free, the bikes are technically usable for the next 24 hours until their automatic locking feature kicks in. At that point, the bikes are often simply abandoned. Some end up in alleyways. Others get tossed in rivers. A few just disappear completely.
And since the bikes are intended to be parked at their many docking stations around the city, they don’t have GPS chips, further complicating recovery of “liberated” bikes.
The issue started small but has grown into more than an inconvenience – it’s beginning to undermine the entire purpose of the service. With bikes going missing at such a high rate, many Vélib docking stations are left empty, especially during rush hours.
Riders looking for a quick commute or a convenient hop across town are increasingly finding themselves without available bikes, or having to walk long distances to find a functioning one.
That kind of unreliability chips away at user confidence and threatens to drive potential riders back into cars, cabs, or other less sustainable forms of transport at a time when Paris has already made great strides to dramatically reduce car usage in the city.
The losses are financially painful, too. Replacing stolen or vandalized bikes isn’t cheap, and the resources spent on tracking down missing equipment or reinforcing anti-theft measures are stretching thin. Vélib has faced theft and vandalism issues before, especially during its early years, but this latest surge has officials sounding the alarm with renewed urgency.
Officials acknowledge that there’s no easy fix. Paris, like many cities with bike-share systems, walks a fine line between accessibility and accountability. Part of what makes Vélib so successful is its ease of use and widespread availability. But those same features make it vulnerable to misuse – especially when enforcement is limited and the consequences for abuse are minimal.
The timing of the problem is especially unfortunate. In recent years, Paris has seen impressive results in reducing car traffic, expanding bike lanes, and promoting cycling as a key part of its sustainable transport strategy. Vélib is a cornerstone of that plan. But if the system becomes too unreliable, it risks losing the very people it was designed to serve.
Meanwhile, as Parisians increasingly find themselves staring at empty docks, the challenge for the city and Vélib will be to restore confidence in the system without making it harder to use. That means striking the right balance between freedom and responsibility, between open access and protection against abuse.
In a city where cycling is supposed to be the future of mobility, losing thousands of bikes to joyriders and sticky fingers isn’t just frustrating; it’s unsustainable.
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