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Why Homeowners Are Switching to Air Source Heat Pumps
Air source heat pumps are becoming a popular choice for homeowners looking to reduce reliance on traditional heating systems and improve long-term energy efficiency.
At PuraFlow Renewables, we install air source heat pumps for homes across the UK, helping customers understand whether a heat pump is suitable for their property, heating needs and future energy goals.
From the initial home survey through to installation and system setup, our team provides clear guidance on heat pump performance, hot water, radiators, running costs and available grant support.
What Is an Air Source Heat Pump – And How Does It Work?
If you’re new to the idea of air source heat pumps, don’t worry—you’re not alone. Let’s break it down in plain English.
An air source heat pump is a low-carbon heating system that pulls warmth from the air outside—even on cold days—and uses it to heat your home and water. Yes, really. It works a bit like a fridge in reverse. Instead of keeping things cold, it makes things warm.
Here’s how it works:
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It draws in outside air
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Extracts the heat using a special refrigerant
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Compresses that heat to raise the temperature
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Then transfers it into your home to warm radiators, underfloor heating, and your hot water cylinder
It’s a reliable system that works all year round—even when temperatures drop below freezing.
The best part? Once it’s installed, you don’t have to do a thing. It just runs quietly in the background, keeping your home cosy while helping to reduce your carbon footprint and energy bills. No more relying on expensive gas. No more surprises when the heating breaks down mid-winter.
Whether you're replacing your old boiler, renovating, or planning a new build, installing an air source heat pump is a smart move—for your wallet, your comfort, and the planet. We’ll help you choose the right system and take care of the full installation from start to finish.
How loud is a heat pump?
The external unit for a heat pump is identical for both monobloc and split heat pumps. Noise is created by large fans moving air across the heat exchanger.
Unless the heat pump is working very hard (ie in cold weather or producing high temperature water), you can expect the noise to be a similar volume to a fridge, if you were standing within a couple of metres. You could easily hold a normal conversation next to it, without raising your voice. As it gets colder outside, this noise will increase while it’s operating, but should still allow you to hold a conversation easily, only raising your voice a little.
The inside unit for a split system only contains valves and pumps and makes very little noise at all.
How will you heat the rooms in your home?
Most homes in the UK use radiators or underfloor heating to circulate hot water.
If you don’t currently have radiators or underfloor heating, you will have to decide whether you’d like to install them. This is a great opportunity to make sure the system is optimised for a heat pump, resulting in lower running costs.
You can find more information about the impact of radiators and underfloor heating on your heat pump’s design here.
Don’t want or can’t install radiators or underfloor heating? An air-to-air heat pump could work for you.
Do you have a hot water cylinder?
A standard heat pump doesn’t provide hot water on demand like a combi boiler, so you will need a way of storing hot water for when you need it. The size of hot water cylinder required will depend on the amount of hot water that your household typically uses, but the cylinder can usually be fitted inside any cupboard that measures around 120x50cm.
Will a heat pump save me money on my energy bill?
Running costs depend on how your heat pump is designed, installed and used. The right system can help improve energy efficiency, reduce reliance on traditional heating and support better long-term control over your home energy use.
Savings will vary depending on your property, current heating setup, energy tariff and usage habits. PuraFlow Renewables can help you understand whether an air source heat pump is suitable for your home and how smart energy tariffs may support lower running costs.
Home Renewable Solutions
Our Air Source Heat Pumps are compatible and work hand in hand with other renewable energy solutions. See our other products and services below that will help to make your home even more energy efficient.
