Choosing the right heating system for your garden room affects your comfort, running costs, and installation budget. Here's what the options are and how to choose.
Garden Room Heating Options: A Practical Guide
Choosing the right heating system for your garden room is important for year-round comfort and running cost efficiency. The best option depends on your insulation specification, how often you use the room, and your budget.
First: Get the Insulation Right
Before choosing a heating system, make sure your garden room is well insulated. A poorly insulated room will be expensive to heat regardless of the system you choose. Aim for U-values of 0.2 W/m²K or better for walls, roof, and floor. See our insulation guide for details.
Heating Options Compared
1. Electric Panel Heaters
The simplest and most affordable option. Panel heaters use electrical resistance to generate heat and are controlled by a built-in thermostat.
Pros: Low installation cost (just a socket), easy to control, no maintenance
Cons: Higher running costs than heat pumps, slower to heat a cold room
Running cost: ~15–20p per kWh (standard electricity tariff)
Best for: Occasional use rooms, well-insulated spaces, low-budget installations
2. Infrared Panels
Infrared panels heat objects and people directly (like the sun) rather than warming the air. They're efficient in well-insulated spaces and popular for garden rooms.
Pros: Efficient in insulated spaces, no moving parts, silent, can be ceiling-mounted
Cons: Less effective in draughty or poorly insulated rooms, higher upfront cost than panel heaters
Running cost: Similar to panel heaters, but can feel warmer at lower temperatures
Best for: Well-insulated garden rooms, occasional use, those who want a clean installation
3. Air Source Heat Pump (Air Conditioning Unit)
A split-system air conditioning unit (like a Mitsubishi or Daikin unit) provides both heating and cooling. It works by extracting heat from outside air and pumping it inside — making it 3–4x more efficient than direct electric heating.
Pros: Highly efficient (COP of 3–4), also cools in summer, fast heating, precise temperature control
Cons: Higher installation cost (£1,500–£3,000), requires outdoor unit, some noise
Running cost: ~4–6p per kWh equivalent (due to efficiency)
Best for: Frequent use rooms, those who also want cooling, long-term cost savings
4. Electric Underfloor Heating
Electric underfloor heating (UFH) uses heating mats or cables under the floor. It provides comfortable, even heat and is popular in garden rooms.
Pros: Comfortable, even heat distribution, invisible, works well with hard flooring
Cons: Slow to heat up (needs to be on a timer), higher installation cost, not suitable for thick carpets
Running cost: Similar to panel heaters, but can be more efficient due to lower thermostat settings
Best for: Rooms with hard flooring (tiles, LVT), those who plan ahead with timers
5. Log Burner / Wood Burning Stove
A wood burning stove adds character and provides excellent heat output. It requires a flue through the roof and a hearth.
Pros: Attractive, excellent heat output, can use free or cheap wood
Cons: Requires flue installation (£1,500–£3,000), needs regular cleaning, not suitable for all buildings, smoke/particulate regulations apply
Running cost: Variable depending on wood source
Best for: Occasional use rooms, those who want a feature fireplace, rural locations
Sizing Your Heating System
As a rough guide, a well-insulated garden room needs approximately 40–60W per m² of heating capacity. So a 4m × 3m room (12m²) needs approximately 500–750W of heating.
For an air conditioning unit, a 2.5kW unit is typically sufficient for rooms up to 20m².
Smart Controls
Whatever heating system you choose, consider smart controls:
- A smart thermostat (like Hive or Nest) allows you to pre-heat the room from your phone
- Time scheduling ensures the room is warm when you arrive
- Some systems can be integrated with voice assistants
Our Recommendation
For most garden rooms used as home offices or studios, we recommend either:
- An air source heat pump (if budget allows) for efficiency and year-round comfort
- Infrared panels (if budget is tighter) for a clean, low-maintenance solution
In both cases, pair with smart controls for convenience.
Running costs are indicative and based on typical UK electricity tariffs. Actual costs will vary.