Retrofit Heating Solutions That Don't Require Tearing Up Your Entire House

Most houses aren't designed to be energy efficient in the way that they heat themselves. Finding a better heating option often sounds like it'll involve an unfortunate project with dust, upheaval, and decisions that need to be made for every single room. Fortunately, many options exist for improving the heating of a home without needing to rip out and replace an entire heating system.

If you have areas in your home that are too cold, rooms that don't ever feel quite right, or old radiators that could do with a modern replacement, there are much simpler routes than ripping everything out and starting fresh.

The Real Meaning of Retrofit

It's a phrase that comes up in various scenarios, but retrofit heating is simply the addition of heat to an existing building. The primary difference between this addition and heating systems that get added to new builds is the need to work with what is instead of imposing arbitrary bounds. That means existing floors (and levels), plasterwork you don't want to touch, and often systems that are already there.

The best retrofit heating systems tend to have a few things in common. They work with what is there instead of assuming similar conditions and working principles to a new building. They do not require the alterations that come with traditional building regulations, and they can often be installed room by room instead of being a once-off project that hits the finances all at once.

Electric Systems for Floors that Already Need Heating

If you need to heat an area with floors that need heating already but don't want (or can't) rip the floors out entirely, electrical options have you covered. Electrical systems have thankfully become remarkably flexible over the years which is great when trying to avoid altering levels and door gaps.

If you have cold areas like bathrooms or kitchens with tiled floors, Electric Underfloor Heating Kits can add cheap and easy heat straight into the floor without needing to connect with existing wet heating systems.

They only require 3-6mm of height which means that they can easily be installed with routine floor alterations (like when you change the tiles in an existing bathroom). You just have to lay the mats or cables, connect a thermostat, and then cover it with whatever flooring you want on top.

The fact that electrical systems can easily be retrofit friendly is because they do not link to existing systems. You won't be emptying any radiators, you won't be attempting to extend pipework, and you won't even be putting more pressure onto your boiler. Each room has its separate control which means there isn't any unnecessary heating of rooms you aren't using.

Panel Heaters and Radiators

Sometimes the issue isn't whole-house heating, but rooms that struggle to get to reasonable temperatures. Panel heaters have come a long way from the storage heaters that many homes still have dotted around the place. Modern electric panel heaters only take up a small amount of wall space, and they can be controlled separately or connected to smart systems.

They work incredibly well in converted areas like garages or lofts where extending a wet (and cold) central heating system would be complicated and costly. The actual installation process is low effort (only mounting to walls and connecting to electricity; but always through a qualified electrician). Running costs will vary significantly based on how well your home is insulated but warming used areas is always preferable than trying to warm an entire building through an undersized system.

One reason this technology has improved its efficiency over time is that many modern panel heaters have features like open window detection (where the heater turns off if it detects a sudden drop in temperature), smart adaptive start times (it learns how long it takes to heat rooms up), and programming cycles based on actual usage instead of assuming ideal figures.

Infrared Heating Panels

Things get interesting with infrared heating panels. These actually heat people rather than the air like traditional systems, and this is used in a way that how sunlight heats people on cold winter days.

In retrofit conditions, this has several advantages.

Infrared heating panels are slim (usually only 20-25mm) thick, and they can be mounted on walls or ceilings instead of having to take up valuable floor space. Some panels even look like mirrors or artwork which may sound gimmicky, but it works in those places where visible heating structures disrupt the interior design.

Installation is nowhere near as complicated as connecting to wet heating systems. The only thing to do is connect power and decide where the best panel placements for maximum benefit are in rooms. You don't have to worry about leaks, pipework, or pressure testing panels. Infrared heating forms a less messy option for homes with solid walls.

The running costs are tricky since infrared heating uses electricity, which usually costs a significant amount more (per unit) than gas. However, infrared heating works differently than assumed with old methods; combined with the fact that each room has its own settings and uses smart algorithms to function; this may still be a cost-effective option than another enormous systems heats a few rooms through traditional whole-house heating.

Making Your Existing System Work Better

Sometimes the best retrofit isn't adjusting what you have but making sure it works at its best capabilities. Equipping existing radiators with thermostatic radiator valves (TRVs) greatly improves efficiency since you can heat each room as needed without needing to rewire/re-pipe each level within your home; which also requires a lot more time/money.

Most existing boiler heating systems can also be retrofitted with smart controls which set programs for the periods that you need it to work rather than non-usage periods where no one is in.

Thermal radiator reflection plates are thin sheets of foil that can fit behind existing radiators. They are located on exterior walls and bounce heat back into rooms rather than allow it to go into cool wall areas (which really works well in solid wall houses that have no other forms of insulation).

Bleeding radiators, checking for pressure imbalances, and ensuring that pumps serve their purpose may sound like basic maintenance concepts but far too many homes live below their potential lifespan of efficiency and capability simply because no one routinely maintains these aspects.

Many radiator systems only need a once-off service from professionals to improve how efficiently they function after dealing with issues like sludge build-up in radiators and air-locks in pipework areas.

The same concept applies to separate system levels needing balancing in buildings that require warming up.

Secondary Heating Options for Problematic Areas

Some areas may not justify connecting to a full-fledged heating system even when it comes to installation costs. Garden rooms or sporadic guest rooms could need some options for heating without connecting them to their buildings. Electric heaters have also come a long way, and there are relatively safe and efficient versions available in portable models (mini ones you can carry into each room).

If you struggle with secondary sources of heat in spaces like garden rooms or converted spaces like sheds, passive solar gain is another way of developing secondary sources of heat in buildings without connecting them to enormously expensive systems. It basically entails making sure that they are filled with windows rather than walls so that they gather as much sunlight during the day as possible (only requiring primary heating at night).

Choosing Your Retrofit Heating Solution

This isn't by any means an exhaustive list of options for retrofit heating, but it does highlight some worthwhile candidates. Choosing the best option for your situation depends on several factors.

Houses without insulation will obviously need to focus on that aspect before any other upgrade can become feasible; heating areas that have holes in them isn't going to work no matter how advanced the system might be.

Other factors that could affect your choice include whether your property is a listed building or part of a conservation zone where options may be restricted, along with budget being an issue too; especially during installation costs and running costs.

A cost-friendly option which becomes detrimental due to high running costs isn't going to work after its initial installation period, while a non-cost-effective option will make life miserable if it can't be used on an ongoing basis.

You also need to take the disruption into account. There's little point in installing an option if the upgrade poses weeks of mess while there are other options around which you won't even notice their installation process.

Most importantly: Think about how you use your property. If you use all areas properly, traditional suggestions may suit your needs. However, if you find yourself spending time in one or two regions of your home more than others, see if targeted options for room heating are recommended rather than those trained in traditional heating patterns.