You arrive at your holiday home after several weeks away, unpack your bags and turn on the bathroom tap. Instead of the usual rush to get ready for the evening, you check why the water smells unusual or wonder how long it will take to heat.
This is one of the small realities of owning a second home that is easy to overlook. A hot water system in a holiday property doesn’t follow the same routine as one in a home occupied every day. The house may remain unused for weeks, then suddenly have several people showering, cooking, and cleaning within a few hours.
That difference matters when choosing and maintaining a water heater.
The right system needs to suit not only the number of people staying at the property, but also the periods when nobody is there. Water quality, pressure, available space, electricity supply and maintenance requirements also deserve attention.
Why Does a Holiday Home Need Different Hot Water Planning?
A primary residence usually has a predictable hot water use pattern. Someone showers in the morning, the kitchen uses hot water throughout the day and another shower may happen in the evening.
A holiday home can be completely different.
It might sit empty for three weeks, then accommodate an entire family over a long weekend. Everyone may want to shower around the same time in the morning. The kitchen may also be in constant use, particularly if several guests share the property.
This means you need to think about both extremes.
When the house is empty, the hot water system shouldn’t run unnecessarily. When guests arrive, it should handle the increased demand without leaving people waiting for hot water.
Consider the number of occupants, bathrooms, visit frequency, and typical usage patterns before selecting a system.
How Should You Choose a Hot Water System for Occasional Use?
Start by looking at how the property is used rather than choosing a system based only on the size of the house.
A small second home used by one or two people may have modest hot water requirements. A holiday property that regularly accommodates a family or group of friends will have a very different demand.
The number of bathrooms is another important consideration. Two bathrooms don’t necessarily mean both will be used simultaneously, but if they are, the hot water system needs to cope with that possibility.
Think about your busiest realistic day at the property. If six people are staying there, how many are likely to shower within an hour? Will someone be washing dishes while another person is using the bathroom? Are there additional hot water outlets?
These questions give you a much more useful basis for choosing the system than simply counting bedrooms.
Should You Choose an Instant or Storage System?
Both instant and storage systems can work in a second home. The choice depends on usage.
An instant system heats water as needed and can suit homes with limited, staggered hot-water demand. It can also be useful where installation space is restricted.
A storage system keeps a quantity of heated water ready for use. This can be convenient in a holiday home where several people may need hot water within a short period.
Don’t choose a system simply because it has a larger capacity or a higher power rating. A system that is too small may struggle during periods of high demand, while an unnecessarily large system can take up valuable space and consume energy maintaining more hot water than the household needs. choose a system simply because it has a larger capacity or a higher power rating. A system that is too small may struggle during periods of high demand, while an unnecessarily large system can take up valuable space and consume energy maintaining more hot water than the household needs.
The ideal choice depends on occupancy, simultaneous usage, bathroom requirements and the property’s plumbing and electrical setup.
What Happens When Hot Water Is Left Unused for Several Weeks?
This is one of the most important points for owners of second homes.
When a property remains vacant for an extended period, water can sit inside the heating system without being used. Manufacturer guidance for some systems specifically notes that water left unused for 15 days or more can develop an odour for some time. The recommended response is to flush out water equivalent to twice the heater’s capacity before normal use.
This is particularly relevant to holiday homes because long periods of non-use are normal.
If you return after several weeks and notice an unusual smell from the hot water, do not assume the appliance is faulty. Prolonged non-use may be the reason.
Always follow the flushing procedure in the instructions supplied with your model. It is also sensible to let the water run appropriately before using it for bathing or other normal household activities.
This small step can make the difference between arriving at your holiday home and having to troubleshoot the plumbing before you can settle in.
What Should You Check When You Return to Your Second Home?
The first thing to do after a long period away is not necessarily to switch on the heater and walk away.
Take a quick look at the installation.
Check the area around the unit for any visible water leakage, dampness or corrosion. Look at accessible pipes and connections. If the water supply has been shut off while the property was vacant, make sure it is restored correctly.
If the system has been drained or disconnected, refill it according to the manufacturer’s instructions before switching on the heating function. Manufacturer installation guidance for storage systems, for example, requires water to flow from the outlet before switching on the electrical supply.
Once the system is ready, allow it to complete its normal heating cycle before relying on it for regular use.
If you notice an unusual smell, poor heating, leakage, or another noticeable problem, investigate it rather than repeatedly switching the system on and off and hoping the issue disappears.
How Do Water Quality and Hard Water Affect the System?
The water entering your holiday home can significantly affect the heating system over time.
Hard water contains minerals that can contribute to scale deposits. These deposits can affect components such as heating elements and water outlets. Manufacturer guidance also highlights scaling as a potential cause of outlet blockage and recommends descaling by qualified service personnel when required.
Keep this in mind if your second home is in a hard water area.
You may not notice the effect immediately because the property is occupied only occasionally. However, the long gaps between visits can mean that small changes in heating performance or water flow go unnoticed.
Before installation, learn about local water conditions and check whether the selected system suits them. The manufacturer’s specifications can provide useful guidance on water hardness, chloride levels and maintenance requirements.
Why Does Water Pressure Matter in a Holiday Home?
Water pressure is another factor to check before installation.
A holiday home in an apartment building may have different pressure conditions from an independent house supplied through an overhead tank or pump. Properties in multi-storey buildings can also experience higher inlet pressure.
The heating system, plumbing and safety components need to be compatible with those conditions.
Manufacturer instructions for some storage systems recommend a pressure reducing valve where inlet pressure exceeds the specified limit. The exact requirements depend on the product and installation.
That is why choosing a system based only on capacity isn’t enough. A qualified installer should assess the property’s water supply and plumbing before installation.
How Should You Prepare for Several Guests Arriving at Once?
One of the most common mistakes with a second home is planning for the average number of occupants rather than the maximum number.
Two people may normally use a property but accommodate six during a family holiday. That sudden increase can significantly change hot water demand.
If several guests tend to shower within a short period, a storage system with appropriate capacity may be more convenient. If usage is staggered, an instant system may be sufficient depending on the property’s requirements.
Also consider the timing of hot water use. Morning showers, kitchen use and other activities may overlap. Understanding these habits before installation can help you avoid choosing a system that looks adequate on paper but feels insufficient when the house is full.
What Should You Do Before Leaving the Property?
Leaving a second home requires as much attention as arriving.
If the property will remain empty for several weeks, follow the manufacturer’s instructions for shutting down the hot water system. Some product manuals specifically advise switching the system off when it is not in use.
Check for leaks before leaving and make sure the area around the appliance is dry and accessible. If the manual includes specific instructions for the water supply, electrical connection, or shutdown procedure, follow those rather than a generic routine.
It can also help to keep the installation and service information somewhere easily accessible. If a caretaker, family member or maintenance professional needs to check the property while you are away, they will have the correct product information available.
How Can Regular Maintenance Prevent Problems?
Maintenance is especially important when nobody is living in the property permanently.
You may notice a small leak or unusual noise quickly in a primary home. In a holiday home, it can go unnoticed for weeks.
Keep an eye out for:
- Water around the appliance or its connections.
- Unusual noises during heating.
- A noticeable reduction in hot water output.
- Water taking longer than usual to heat.
- Unusual smells that continue after flushing.
- Visible corrosion.
- Reduced water flow caused by scaling.
- Dripping from safety components.
Some systems also have components that require periodic inspection. For example, manufacturer guidance for certain storage models recommends checking the anode periodically and replacing it when it reaches the specified condition.
The exact maintenance schedule should come from the product manual and the installation conditions, not a one-size-fits-all timetable.
What Should You Consider Before Installing a Hot Water System?
Before deciding, look beyond the appliance itself.
Ask yourself:
- How many people usually stay at the property?
- What is the maximum number of guests?
- How many bathrooms are there?
- How often is the property occupied?
- How long does it normally remain vacant?
- Is hot water likely to be used at the same time?
- What is the local water quality like?
- What is the available water pressure?
- How much installation space is available?
- Who will check the property when you are away?
- What does the manufacturer’s manual recommend for prolonged non-use?
- How easy will it be to access the system for servicing?
These questions connect your system choice to how you use the property.
How Can You Make Hot Water Less of a Holiday-Home Hassle?
A second home should give you a break from everyday routines, not create a maintenance list every time you visit.
The best approach is to plan for the realities of occasional occupancy. Choose a system based on actual hot water demand, account for local water and pressure conditions, follow the correct installation procedure, and consider what happens when the property sits unused.
Most importantly, don’t treat prolonged non-use the same as normal household use. A system that works quietly every day in a primary residence may need a little more attention when it is left idle for weeks.
A few checks before you leave, a sensible restart routine, and regular maintenance can go a long way. That way, when you return to your holiday home, you can spend your first evening enjoying the place rather than trying to figure out what went wrong with the hot water.