Pew heaters sit beneath or behind the pews and warm the congregation directly, either by convection (heating the air immediately around the seating) or by infrared radiation (warming people and surfaces without heating the air). Either way, the energy goes where people actually sit rather than into the roof void.
A typical unit draws 300 to 500 watts and fits discreetly under a pew. Because they are out of sight once installed, they are one of the least visually intrusive heating options available, which matters in a listed interior where wall or ceiling-mounted equipment would need faculty consent. They are also completely silent, which suits churches where background noise from fans or blowers would be unwelcome.
The main limitation is coverage. Pew heaters warm the seated areas well, but aisles, the chancel, vestries and any open space used for events remain unheated. Churches that host concerts, exhibitions or community gatherings in the nave may need a complementary system for those occasions.
Electrical supply
Each pew needs its own unit and a cabling run back to a central distribution panel. In a church with 40 to 60 pews drawing 400 watts each, the total load is 16 to 24 kW. Many older churches have a single-phase supply rated at around 15 kW, so a three-phase upgrade may be needed. This typically costs around £10,000 on top of the heater installation and requires coordination with the local distribution network operator.
Faculty and permissions
Because pew heaters are largely invisible once installed, they tend to attract fewer objections from Diocesan Advisory Committees than wall or ceiling-mounted alternatives. The cabling route is the main consideration: surface-run cables along pew ends or beneath floor channels need to be neat and reversible where possible. Listed building consent may still be required depending on the grade and the extent of fixing into historic fabric.
Running costs
Pew heaters are among the cheapest church heating systems to run. Because they heat a small volume of air close to people rather than the whole building, energy use is low. A typical parish church with 40 to 50 pews might use 800 to 3,000 kWh per year depending on how often services are held, putting annual electricity costs well below most alternatives. They also reach a comfortable temperature within about 15 minutes, so there is no need to pre-heat for hours before a service.