So, you’ve probably heard everyone talking about heat pumps lately, right? Especially around Guildford and Farnham, it feels like every other neighbor is looking at making their house a bit more "green" and future-proofing against those ever-climbing energy bills. We get asked about them constantly here at Heat Eco Building Services, so Michael thought it was high time we put together a proper guide for all our Surrey residents. This is actually part one of a 7-day series we’re doing to help you lot understand how to make your home more sustainable, covering everything from solar to those fancy eco-boilers.
Sustainable Surrey 101 starts right here with Air Source Heat Pumps (ASHPs). They might sound a bit technical or like something from a science lab, but they’re actually pretty straightforward once you get past the jargon. If you want to cut your carbon footprint and stop worrying about the price of gas every five minutes, you're in the right place.
What on earth is an Air Source Heat Pump?
In the simplest terms possible, an air source heat pump is like a fridge, but in reverse. You know how the back of your fridge feels warm? That’s because it’s taking the heat from the inside and pushing it out. An ASHP does the exact opposite for your home. It takes the heat from the outside air: even when it feels freezing outside to us: and pumps it into your house to keep you toasty.

It’s a bit of magic, really. These units sit outside your house, usually looking like a large air conditioning fan, and they work incredibly hard to extract thermal energy from the atmosphere. Even at temperatures as low as -15°C or -20°C, there’s still enough heat in the air for these things to work. They use a refrigerant to absorb that heat, compress it to make it even hotter, and then transfer that warmth into your central heating system or your hot water tank.
Why Surrey residents are making the switch
Living in places like Farnham, Guildford, and Bordon, we’re lucky to have some stunning homes, but many of them are older and can be quite drafty. Who wants a cold house in the middle of a Surrey winter? Not us. That’s why ASHPs are becoming the go-to choice.
There are three big reasons people are calling us up for heat pump installation in Farnham and Guildford:
- Efficiency that actually makes sense: For every 1kW of electricity you put into an ASHP, you usually get about 3kW to 4kW of heat out. Compare that to a brand new gas boiler where you put in 1kW of gas and get maybe 0.9kW of heat. It’s a no-brainer when you look at the math.
- The Environment: If you’re worried about the planet (and we all should be these days), moving away from fossil fuels is the biggest step you can take at home. When you pair an ASHP with PV solar panels, you’re basically running your heating for next to nothing and with zero emissions.
- The Government is helping out: Right now, there are some pretty decent grants available (like the Boiler Upgrade Scheme) that can take a huge chunk out of the installation cost. We help our clients navigate all that boring paperwork so they can get the best deal.
How it looks inside your home
A lot of people worry that they’ll have this massive, ugly machinery taking up all their space. But honestly, a professional installation is a thing of beauty. We take a lot of pride in our pipework and how we organize the "brain" of the system.

In a typical setup, like the one we recently finished in Guildford, you’ll have a high-efficiency hot water cylinder and a control unit that manages everything. We love using NIBE systems because they’re incredibly reliable and easy for the homeowner to use. You can see in the photo how we keep everything neat: copper pipework properly lagged, expansion vessels tucked away, and everything labeled. It makes the utility room look like a proper piece of engineering rather than a mess of wires.
Is your Surrey home ready?
Now, we have to be honest with you: ASHPs aren’t a "plug and play" solution for every single house without a bit of prep. Because they provide a lower, more consistent heat than the "blast" of a gas boiler, your home needs to be able to hold onto that heat.
- Insulation is key: If your loft is empty and your walls are thin, the heat will just escape. We always recommend checking your insulation before we dive into a full install.
- Radiators vs. Underfloor Heating: Because the water in a heat pump system isn't as scorching hot as a gas system, you might need slightly larger radiators to get the same warmth. Or, even better, underfloor heating is the perfect partner for a heat pump. It uses the lower temperature water perfectly and feels lovely under your feet on a Monday morning.
- The Cylinder: You’ll need space for a hot water cylinder if you don't already have one (like if you’re switching from a combi boiler).

The Installation Journey with Heat Eco
When we come out to Bordon or Farnham to look at a job, we don't just quote you a price and leave. We look at the whole house. Michael always says we’re problem-solvers first and installers second. We calculate the heat loss for every room to make sure the unit we install is the perfect size: too big and it’s inefficient, too small and you’ll be wearing a jumper indoors.
The electrical side of things is just as important as the plumbing. We make sure the control panels are wired up perfectly so that your heating integrates with your smart home setup or your solar storage.

We handle everything from the initial ground prep for the outdoor unit to the final commissioning where we show you how to use the app on your phone to control your heating. It’s all about making it easy for you. There's no point having all this fancy tech if you can't figure out how to turn the heat up, right?
Future-Proofing: The Bigger Picture
This post is just the start. Over the next week, we’re going to be talking about how these heat pumps work with solar panels and battery storage. Imagine a world where the sun hits your roof in Farnham, charges a battery in your garage, and then that battery runs your heat pump all evening. That’s not science fiction; that’s what we’re building for people right now.
Even if you’re not ready for a full heat pump yet, maybe you’re looking at a boiler installation in Farnham or Guildford to replace an old, dying unit. Even then, we can set you up with a system that's "heat pump ready," so when you're ready to make the jump in a few years, the transition is much easier.
A bit of "Real Talk" about Maintenance
We’ve seen some horror stories where people have had heat pumps installed by "cowboys" who don't know their COP from their elbows. A poorly maintained system will cost you more in the long run. We’re big believers in regular servicing. Sometimes that means a power flush of your existing radiators to make sure there’s no sludge blocking the efficiency of your new pump. We want your system to last 20 years, not 5.
Wrapping Up Day 1
Switching to an air source heat pump is a big decision, but it's one of the best things you can do for your home and the Surrey countryside we all love. It's about comfort, it's about saving money, and it's about doing the right thing for the next generation.
If you're sitting there in Guildford or Bordon wondering if your house is a good fit, why not give us a shout? We’re a friendly bunch and we love talking through these projects. You can check out our gallery to see some of the "stunning" results we’ve achieved for other local families.

Whether it’s a full heating overhaul or you just want a more eco-friendly bathroom, we’ve got you covered. Stay tuned for tomorrow’s post where we’ll be diving into the world of PV Solar Panels and how they’re the secret weapon for any sustainable home.
If you've got questions about ASHPs, don't be shy: get in contact with us. We're here to help you navigate the green revolution without all the stress. See you tomorrow!