Highlights
New radiators can cost between $250 and $2,500 per unit depending on type, style, and size
Radiators are designed to last decades, so repair is needed more often than replacement
There are many ways to troubleshoot a broken radiator before hiring a professional or replacing the system
It’s important to regularly maintain your radiator to prevent severe damage and save money
Radiator units are built to virtually last forever. It’s a tried-and-true heating system that can be traced back to the 19th century.
If you’re experiencing issues with your radiator, replacement may not be the best solution. Oftentimes, the issue isn’t with the radiator itself, but with other parts of the radiator system instead.
There are ways to troubleshoot your radiator system on your own before hiring a professional or jumping the gun on a new radiator. For example, you can try bleeding the radiator or manage the pressure in the boiler tank first.
However, there are several reasons why you may want to invest in a brand new radiator. Age, style, and even function could be a factor.
We’ve compiled everything you need to know about radiator replacement costs, including repair tips, so you can make the best decision for your home (and wallet).
How Much Does It Cost to Replace a Radiator?
The cost of replacing a radiator will vary depending on the type of radiator you choose, the cost of HVAC labor in your area, the size of the radiator, and whether or not you need a new boiler as well.
| Repairs | Cost |
|---|---|
| New Radiator Cost | $250 – $2,500 |
| Radiator Installation Cost | $50 – $100 per hour |
| New Boiler Cost (if necessary) | $1,000 – $7,500 |
| Boiler Installation Cost (if necessary) | $1,000 – $2,000 |
New Radiator Costs
The cost of a new radiator varies by radiator type:
Hot water radiators range from $100 to $1,000 per unit.
Electric radiators range from $200 to $1,500 per unit.
Steam radiators are the most expensive, ranging from $300 to $2,500 per unit.
Radiator costs can also vary by design and style:
Basic radiators can run between $250 and $500.
Cast iron radiators cost between $100 for a small radiator and around $500 for a large one.
Modern design radiators are the most expensive, costing between $300 and $1,000 depending on size and style.
Radiator Installation Costs
HVAC labor costs to install a radiator typically range between $50 and $100 per hour. Because installing a new radiator can be a complicated process, it requires the skills of a local HVAC specialist.
New Boiler Costs
If you’re installing a new radiator system or need to replace your current system completely, you’ll potentially have to purchase a new boiler as well. Boilers range from $1,000 on the low end to $7,500 on the high end.
Boiler Installation Costs
Labor costs to install a boiler typically range between $1,000 and $2,000 depending on where you live. If you choose to fix your boiler instead of replacing it, the cost to repair a boiler can range between $200 and $600.
For more detailed cost information specific to your location, contact a highly rated boiler installation professional in your area.
Replacing vs. Repairing a Radiator
Radiators are designed to last decades so replacing them is rare. More often than not, radiator issues stem from the boiler, not the radiator itself. Hire an HVAC professional who can diagnose the issue, quote radiator repair costs, and suggest the best course of action.
Reasons for Replacing a Radiator
Though it is uncommon to have to replace a radiator, there are some reasons why you would want to.
Your Current Radiator Is Too Small
The larger the radiator, the more hot air it can release. It may be a good idea to get a bigger radiator if your current one isn’t large enough to heat the space properly. This can happen when a home has been remodeled and walls have been knocked down, making rooms larger than the original radiator intended to cover.
You Want an Upgrade
It’s likely that your radiator is original to the house. Depending on when your house was built, the radiator could be outdated and cramping your interior style. You may want to upgrade your current radiator for something newer and more modern.
Your Radiator Rusted Internally and Developed a Leak
Radiators can last a long time, but some materials deteriorate quicker than others. For example, cast iron radiators can rust internally over time if not properly maintained. Rusted radiators lead to sludge buildup, holes, and leaks—all things that can damage a radiator beyond repair.
Troubleshooting Common Radiator Problems
Before replacing your radiator, try troubleshooting for these common issues first. If these fixes don’t solve your problem, it’s best to hire a local HVAC professional who’s trained to diagnose and resolve radiator issues.
Try Bleeding the Radiator
Your radiator may need to be bled if it feels cold at the top but warm at the bottom. To bleed the radiator, turn off the pump and let everything cool down. Open the valve with a radiator key, and wait for water to start flowing out before closing the valve again. Make sure to have a cup or bowl underneath the valve to catch the water.
Make Sure the Radiator Is Sloped
One-pipe radiator systems are designed to work best at a slight slope, leaning toward the inlet pipe. Place a piece of 1/4-inch wood plank under the vent to create a slope. This should help subside any loud gurgling noises coming from the radiator.
Check for Valve Leaks
Do you notice water leaking around the radiator? Check the large-cap nuts on the valve connections first, and use a large wrench to tighten both nuts. If that doesn’t do the trick, you may need to remove the valve head to tighten the gland nut that’s just underneath.
Check for a Blown Fuse
When the radiator is cold and doesn’t seem to be working properly, you could simply be dealing with a blown fuse. Troubleshoot the circuit breaker and see if that kick-starts the radiator. If it still isn’t turning on and feels cold to the touch, try turning the diverter valve (next to the boiler) on and off.
How to Properly Maintain a Radiator
Regular maintenance can prevent big problems in the long run. Though you can use these tips as a starting point to properly care for your radiator, it’s always best to refer to the manufacturer’s guide for maintenance instructions specific to your unit.
Prevent rust. Some radiators (specifically cast iron) can rust over time, leading to potentially serious damage if left untouched. Check your radiators frequently, and apply a treatment at the first sign of rust. For a natural solution, place a cloth soaked in white vinegar over the rust, and leave it there for 24 hours before cleaning the area. You can also do this with lime and salt or a baking soda paste made with water.
Inspect. Thoroughly inspect the pipes and valves regularly for cracks and leaks. Resolve the issues as they pop up.
Bleed the radiators. Bleeding the radiator is the simple process of moving trapped air through the radiator. This can be done by shutting off the radiator, opening the valve, and releasing excess air.
Check boiler pressure. Regularly check the boiler to make sure the water pressure isn’t too high or too low. A general rule of thumb is to keep your hot boiler between 1.5 and 1.8 bar. However, it’s safest to refer to the manufacturer guide for your boiler’s specific pressure range. If the boiler pressure is too low, you can fix the issue by adding more water to the system. If the boiler pressure is too high, use the pressure relief valve to let some of the water escape.
