Let’s take them one by one in this thread.
False. The most heat pumps can be found in the coldest climates. More than half of all households in Norway have one.
Mainly false. Even at temperatures below freezing heat pumps still perform well as field data shows. For very cold temperatures well below freezing hybrid systems may be needed.
False. From long-standing research: “The research results clearly show that heat pumps as heating source function reliably also in existing buildings. As a rule, the units worked flawlessly.”
False. Recent results from the UK indicate that there is no significant variation in performance based on house age.
I also had a heat pump in my home built in 1880 since 2019 performing very well.
This depends on energy prices in your country. @IEA produced a handy interactive calculation tool that allows you to explore & compare economics of different residential heating systems.
You never switch the heat pump off manually but this does not mean the heat pump is operating all the time. The system automatically adjusts to outside and indoor temperatures and ramps down when it is warmer.
Heat pumps work well with radiators too. In some cases radiators may need upgrading. But it has been common practise in recent years for heating installers to ‘oversize’ radiators.
Households who installed a heat pump report that they are as comfortable or more comfortable than before the installation in survey by @CoolproductsEU.
81% have seen the level of comfort improve.
coolproducts.eu/coolproducts-r… 
Heat pumps perform successfully across Europe – New consumer analysis
Heat pumps and solar thermal systems are keeping users all across Europe well in their comfort zones – physically, financially, and environmentally. The latest Coolproducts analysis reveals that 88% …
https://www.coolproducts.eu/coolproducts-reports/heat-pumps-perform-successfully-across-europe-new-consumer-analysis/
Ground source heat pumps make very little noise. Air source heat pumps can be quiet too as this video shows. Also remember: in the summer when you’re out in the garden heat pumps usually don’t run as no heating required.
False. “Houses do not have to be extensively renovated in order to allow for an installation of a heat pump.”
But good fabric efficiency offers energy system benefits and keep costs down.
blog.innovation4e.de/en/2021/02/24/…
Does a house have to be renovated first in order to install a heat pump? | Innovation4E
Episode 3 on heat pumps in existing buildings, where Marek Miara explains why it is okay to renovate a house after you installed a heat pump.
https://blog.innovation4e.de/en/2021/02/24/does-a-house-have-to-be-renovated-first-in-order-to-install-a-heat-pump/
False. At SCOP 3 a heat pump even if running 100% on gas electricity needs ~1/3 less gas to make the same amount of heat than a boiler.
False. The evidence suggests the opposite. Heat pumps increase the value of properties.
“Residences with an air source heat pump enjoy a 4.3–7.1% (or US$10,400–17,000) price premium on average.”
Estimation of change in house sales prices in the United States after heat pump adoption – Nature Energy
Estimating the costs of green home improvements is not possible without accurate estimates of their impact on house prices. Now, Shen et al. use the sales data of more than 400,000 properties in the U…
https://www.nature.com/articles/s41560-020-00706-4
Partially true. But many countries offer subsidies for heat pumps & with running costs included heat pumps can offer lifetime savings over fossil fuel systems. But it depends on the country. Some examples 👇
Taking the burn out of heating for low-income households
The future of heat in buildings is not fossil fuelled. The urgency of the climate crisis, Europe’s 2030 climate targets, the current war in Ukraine and RAP highlights strategies and recommendations fo…
https://www.raponline.org/knowledge-center/taking-burn-out-of-heating-low-income-households/
Partially true. In many places there is capacity in the grid to supply electricity for more heat pumps. But with significant heat pump uptake electricity demand will grow and grid investment is needed.
Industry: European electricity grid can handle 50 million heat pumps
Electric heat pumps can be deployed on a large scale in Europe without jeopardising grid stability while allowing greater integration of renewable energy sources and improving energy efficiency in bui…
https://www.euractiv.com/section/energy/news/industry-european-electricity-grid-can-handle-50-million-heat-pumps/
False. Better fabric efficiency and district heating are very important too and can offer large system benefits in terms of flexibility and system benefits.
Heating without the hot air: Principles for smart heat electrification
Heating in buildings is responsible for almost one‑third of total EU energy demand, and around 75% of heat is still produced by burning fossil fuels. The
https://www.raponline.org/knowledge-center/heating-without-hot-air-principles-smart-heat-electrification/
False. There are projects where tower blocks use ground source heat pumps for example from @KensaHeatPumps. And large heat pumps can fuel district heating networks connecting apartments.
False. It is true that most power grids still include a lot of fossil generation. But every year substantial amounts of renewables are added to the grid driving out fossil generation.
It is true that during a power cut heat pumps cannot function. But the same is the case for a gas boiler.
Will A Power Cut Affect My Boiler? | How To Reset Your Boiler After A Power Cut MCR Plumbing Gas.
Do know what to do in the event of a power cut? Our blog has all the answers regarding how to get your boiler back up and running after a power cut.
https://mcrgas.co.uk/how-a-power-cut-affects-your-boiler/#:~:text=Both%20boiler%20and%20gas%20central%20heating%20systems%20require%20electricity%20to%20become%20functional
False. 2022 saw record growth in heat pump sales in Europe and in the US for the first time more than 4m heat pumps were sold surpassing gas furnaces for the first time.
Only partially true. Microbore piping is not ideal but as @_heatgeek points out it can work with a heat pump under certain conditions. heatgeek.com/what-to-do-wit…
False. The first heat pump as we know it today was built by Peter von Rittinger in 1856. Heat pumps were put in peoples’ homes already many decades ago.