Why are some radiators cold?

Trapped air, closed valves or circulation problems are common causes.

Should I replace an old boiler?

If it's inefficient or failing, a modern boiler can cut gas use significantly.

A boiler heats water and a pump circulates it through radiators or in-floor tubing. The heat is quiet and even, without blowing air.

Cold radiators, banging or gurgling pipes, leaks, low pressure and a boiler that won't fire.

Air trapped in radiators stops them heating fully. Bleeding them releases air; ask a technician to show you how.

Old cast-iron boilers can be very durable but inefficient. Modern condensing or combination boilers use less gas and can also heat domestic water.

Radiant floors are comfortable but slow to respond. Set the thermostat and leave it.

Radiator homes don't have ducts for central air. Ductless mini-splits are a popular way to add cooling. See ductless mini-splits.

Gas boilers need regular service by a licensed gas fitter and working CO alarms.

Tell the technician about your boiler and radiators. Send a request and an HVAC technician will get in touch.

Hot water heating pipes in outside walls or crawl spaces can freeze if the boiler fails in a cold snap. Act quickly if heat stops.

Have a boiler serviced yearly by a licensed gas fitter, including checking the burner, controls, pump and venting.

Covers and furniture in front of radiators block heat. Keep them clear, and use reflective panels behind radiators on outside walls.

Boilers rely on correct pressure and a working expansion tank. A pressure gauge that's too high or too low points to a problem worth checking.

Hot water systems are easy to zone, with separate thermostats for different floors or rooms.