In this guide
Quick answer: heavy duty suits most commercial doors. Choose extra heavy duty only when the door is regularly abused, exposed to weather or needs the extra rigidity of cast iron.
Both labels get used loosely, so we will use two real products as examples: the DRIWON DN-8220, sold as heavy duty, and the DN-9500, sold as extra heavy duty. Both are ANSI/BHMA Grade 1, so the gap between them is smaller than the names suggest.
DN-8220 vs DN-9500 at a glance
| DN-8220 Heavy Duty | DN-9500 Extra Heavy Duty | |
|---|---|---|
| Grade | ANSI/BHMA A156.4 Grade 1 | ANSI/BHMA A156.4 Grade 1 |
| Cycle testing | 2 million | Over 2 million |
| Fire listing | UL 3-hour | UL 3-hour |
| Door weight | 44 to 440 lbs | Up to 440 lbs |
| Spring sizes | 1 to 6 | 1 to 6 |
| Body highlight | Aluminum finish, lighter build | Cast iron body, wrought steel arm |
| Adjustments listed | Speed, latch, delay, backcheck | Speed, latch, delay |
| Unit weight | About 7 lbs | About 12 lbs |
| Official store price* | $139.99 | $169.99 |
*Prices at the time of writing, before any promotional code. Check the store for current pricing.
Choose heavy duty if...
- The door is a normal commercial door, up to 48" wide.
- You want backcheck listed as a feature, and a parallel arm bracket in the box.
- The frame is light, so a smaller closer is easier to attach.
- You are fitting many doors and the cost adds up.
Choose extra heavy duty if...
- The closer will be knocked, forced or abused.
- The door is outdoors and takes wind every day.
- The building is a factory, school or restaurant with constant traffic.
- Earlier closers on the same door have failed.
What about door weight?
Both DRIWON closers are rated up to 440 lbs, so weight alone will not decide this. Look at abuse and exposure instead. For very heavy doors, see our guide to closers for 400 lb doors. For the sizing basics, start with the size chart. If you lean toward the bigger unit, read our extra heavy duty guide.
See the DRIWON DN-8220 on Amazon →
Four real-world examples
Small retail shop, aluminum door
Moderate traffic, sheltered entrance, thin frame. The lighter heavy duty option wins. It is easier to attach and offers everything the door needs.
Elementary school main entrance
Hundreds of cycles a day, kids hanging on the door, weather. This is exactly the job for extra heavy duty, along with a stop and solid through-bolting.
Restaurant back door
Steel door, staff carrying crates, wind and grease. Extra heavy duty gets our vote, with a powder-coated finish that wipes clean.
Medical office corridor door
Interior, moderate traffic, ADA matters. A heavy duty closer with backcheck and delayed action is the better fit, and it is easy to set to a comfortable force.
What the price difference really buys
At the time of writing, the gap between these two DRIWON closers is $30. Across one door, that is a rounding error next to the installation labor. So if a door is a borderline case, the bigger closer is reasonable insurance, as long as the frame can carry it. Across fifty doors, however, $30 each adds up to $1,500, so save the upgrade for the doors that need it.
Do not ignore the mounting surface
There is one situation where a bigger closer is the wrong choice even if money is no object: a thin frame or a narrow top rail. A 12 lb cast iron closer needs solid fixing. On a light door, the smaller closer may be stronger overall, simply because it will stay attached and aligned. If you are unsure, go by what you are fixing to, rather than by the closer's marketing.
A quick decision rule
- Is the door abused, exposed or a repeat failure? Choose extra heavy duty.
- Is the frame thin or the top rail narrow? Choose heavy duty.
- Do you need listed backcheck and a parallel arm bracket? Choose the DN-8220.
- Still unsure? Start with heavy duty and upgrade if that door proves tough.
Frequently asked questions
Is extra heavy duty always better?
Can I use an extra heavy duty closer on a light door?
Does the DN-9500 have backcheck?
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