Slash Hot Tub Running Costs with an Air Source Heat Pump

Buying a Heat Pump for your Hot Tub could be a wise decision to reduce costs. Many hot tub owners seek ways to enjoy their relaxation time without breaking the bank. Enter the air source heat pump (ASHP)—an eco-friendly and cost-efficient solution designed to keep your hot tub warm and your bills low. This article explores the costs, benefits, and considerations of adding an air-source heat pump to your hot tub, helping you decide whether it’s the right upgrade for your setup.

What Is an Air Source Heat Pump and How Does It Work?

An air source heat pump (ASHP) is an innovative and highly efficient heating system that extracts heat from the outside air and uses it to warm your hot tub water.

This process works effectively even in cooler climates like the UK, making it a reliable solution for energy-conscious homeowners.

How It Works:

Heat Extraction: The pump draws in air from its surroundings, even if the temperature is as low as -5°C or -10°C.
Refrigerant Cycle: The air passes over a refrigerant, a liquid that absorbs heat efficiently at low temperatures.
Compression: The refrigerant is compressed, increasing its temperature significantly.
Heat Transfer: The now-hot refrigerant circulates through a heat exchanger, transferring its warmth to the water in your hot tub.
Release: The refrigerant cools, ready to repeat the cycle.

This continuous process allows the heat pump to generate far more heat than the energy it consumes, achieving an impressive efficiency rate. For every unit of electricity the system uses, it can produce up to four units of heat—a Coefficient of Performance (COP) of 4.0.

In contrast, traditional electric heaters convert one unit of electricity into one unit of heat. This means an air source heat pump can achieve up to 400% efficiency, significantly reducing energy consumption and lowering running costs.

How Much Does an Air Source Heat Pump Cost for a Hot Tub?

When considering an air source heat pump (ASHP) for your hot tub, two main costs come into play: the upfront cost of the pump itself and the installation fees.

Pop into our Hot Tub Shop in Surrey to see for yourself. Alternatively, let’s explore what you can expect when budgeting for this upgrade.

Initial Costs of Air Source Heat Pumps

Air source heat pumps designed for hot tubs vary in price based on their size, brand, and features.

Here’s a breakdown of popular UK options:

Thermotec Inverter Heat Pumps: Known for their high efficiency and low noise, Thermotec models are ideal for small to medium-sized hot tubs. Prices typically start at £850 and can go up to £1,500 for larger, more advanced models.
Hydro-Pro Heat Pumps: A trusted brand offering models for various heating capacities. Prices range from £800 to £1,400, depending on the size and heating power.
Duratech Heat Pumps: Duratech is renowned for its durable and technologically advanced models. These pumps cost between £1,000 and £1,800, catering to users looking for premium features like rapid heating and smart controls.
Energi Heat Pumps: Known for their durability, efficiency, and ease of use, Energi Heat Pumps are an excellent choice for those looking to reduce energy costs without compromising on performance. Their models are compatible with various hot tub sizes and feature smart controls for precise temperature management. With a strong focus on sustainability and reliability, Energi Heat Pumps are a top pick for UK hot tub owners seeking premium-quality solutions.

While these initial costs might seem high compared to traditional electric heaters, the potential for long-term savings often outweighs the investment.

Installation Costs

In addition to purchasing the pump, you’ll need to budget for professional installation. UK electrical regulations, such as Part P of the Building Regulations, mandate that air source heat pumps be installed by a qualified electrician. This ensures proper setup, safety, and compliance with warranty requirements. Installation fees typically range from £500 to £1,000, depending on factors such as:

The complexity of the installation.
Distance from the power supply.
Site preparation, including ventilation and drainage.

Long-Term Savings Offset Initial Costs

While the upfront expense of an ASHP can be significant, the long-term energy savings are compelling. Over the course of a year, frequent hot tub users can save hundreds of pounds on energy bills, making the investment worthwhile.

How Much Can an Air Source Heat Pump Save on Energy Bills?

One of the most compelling reasons to invest in an air-source heat pump is the potential for energy savings.

Traditional electric hot tub heaters typically consume around 3-5kWh of electricity per hour, while air source heat pumps use significantly less due to their efficiency.

For example:

A traditional heater may cost around 60-90p per hour to run (based on 20p per kWh electricity costs).
An air source heat pump can reduce this to as little as 15-30p per hour, saving up to 70% on heating costs.

Over a year, this could translate into hundreds of pounds saved, particularly for hot tubs used regularly

As mentioned previously, traditional heaters use 3kw and give you 3kw out. Air Source Heaters typically use 1KW but give you 8KW out. This is a huge saving.

During the very cold winter months, the KW out efficiency might drop to 5KW out, but this is still 5 times better vs the cost.

Benefits of Using an Air Source Heat Pump with Your Hot Tub

Energy Efficiency and Lower Running Costs

The primary advantage of an air source heat pump is its efficiency.

By transferring heat rather than generating it, ASHPs require far less electricity, making them an environmentally friendly choice as well as a cost-effective one.

Consistent Water Temperature

Air source heat pumps maintain a steady water temperature more effectively than traditional systems.

This ensures that your hot tub is always ready for use without frequent reheating, further enhancing energy savings.

Eco-Friendly Operation

ASHPs reduce your carbon footprint by consuming less energy and relying on renewable heat sources.

This makes them an ideal choice for environmentally conscious hot tub owners.

Long Lifespan

When properly maintained, air source heat pumps can last for 15-20 years, offering long-term reliability and value.

Are There Drawbacks to Consider with Heat Pumps?

While air-source heat pumps offer many benefits, it’s important to be aware of their potential drawbacks:

Higher Initial Investment: The upfront costs can be significant compared to traditional heaters.
Performance in Cold Climates: Although efficient, ASHPs may require more energy to operate in sub-zero temperatures, which is rarely a concern in the mild UK climate.
Space Requirements: ASHPs must be installed in a well-ventilated outdoor area, which may not be feasible for all properties.

How to Maximise the Efficiency of a Heat Pump with Your Hot Tub

Efficiency isn’t just about the equipment itself but also how you integrate it into your hot tub routine. Here’s how to get the most out of your investment:

Insulate Your Hot Tub Properly: Upgrade to a premium insulated cover and consider adding a floating thermal blanket to retain heat.
Optimise Your Temperature Settings: Lower your hot tub’s temperature slightly when it’s not in use to prevent unnecessary energy consumption.
Use Timers and Smart Controls: Schedule heating cycles during off-peak electricity hours.
Regular Maintenance: Keep filters clean, maintain water chemistry, and check the heat pump’s coils for debris.
Position Your Heat Pump Correctly: Install it in a sheltered yet ventilated area to maximise efficiency year-round.

Save Money and Stay Warm with an Air Source Heat Pump

Adding an air source heat pump to your hot tub is an investment in both comfort and sustainability. With the potential to save up to 70% on energy bills, maintain consistent water temperatures, and reduce your environmental impact, ASHPs are an increasingly popular choice for UK hot tub owners.

Ready to explore your options? Contact Pools and Spas Windlesham for expert advice on choosing and installing the perfect air source heat pump for your hot tub.