Dorma RTS88 Series - RTS25 Ove...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$949.00
$663.94
Dorma RTS88 Series - RTS25 Overhead Concealed Door Closer, Hinge Hung, Single Acting, Aluminum Door and Frame (Non-Handed)

Dorma RTS88 Series - RTS25 Overhead Concealed Door Closer, Hinge Hung, Single Acting, Aluminum Door and Frame (Non-Handed)

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Model: RTS25 105 NHO SZ3
$949.00
$663.94
Selected Finish (Including 8653 Cover Frame) is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$949.00
$663.94
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DORMA RTS88 Series Overhead Concealed Door Closer

The RTS88 is designed to give lasting, dependable service where surface applied units and other types of closers are not suitable, or would interfere with the architectural design. It can be easily installed in wood, aluminum, or hollow metal doors and frames, for single and double-acting doors.

  • Concealed installation
  • For single and double-acting doors
  • Dependable and easy to Install

Aesthetic advantages

Architects are often challenged to design buildings that are both beautiful and functional, down to the last detail. The DORMA RTS88 overhead concealed door closer offers the perfect solution for those who prefer the aesthetic advantages of a concealed door closer.

Vandalism protection

The RTS88 is an excellent replacement closer for problem entrances encountering vandalism of surface applied closers.

Benefits for the contractor

Contractors appreciate the RTS88 closer, because the majority of door and frame preparation is done prior to installation of the unit, resulting in less on-site machining.

Resources:
RTS88 Series Catalog

Manufacturer Resources

Product Specs

Product Group:
Door Controls
Series:
RTS Series
Product Subgroup:
Door Closers - Overhead Concealed
Product Type:
Overhead Concealed Door Closers
Subcategory:
Concealed Door Closers
Door Weight:
250 lbs
Door Swing:
Single Acting
Commercial/Residential:
Commercial
Package Features:
Hinge Hung ; Aluminum Door and Frame
Product Model:
RTS25
Door Hand Direction:
Non-Handed
Product Category:
Door Controls
Department:
Door Hardware

Dormakaba RTS25 105 NHO SZ3 – Frequently Asked Questions

1) Will the Dorma RTS25 concealed closer handle a heavy aluminum entrance door?
The RTS25 is rated for doors up to 250 lbs, which covers most full-height aluminum storefront entrances. Spring size is what you match to the actual leaf: SZ3 handles 3'-0" to 3'-6" interior or 2'-6" to 3'-0" exterior doors, and SZ4 is the strongest, for 3'-6" to 4'-0" interior or 3'-0" to 3'-6" exterior. Exterior doors need more power than interior doors of the same width because of stack and wind pressure, so size off the exterior column if the opening is an entrance.
2) Is the Dorma RTS25 closer handed, or does one unit work on both left and right doors?
One unit covers both hands. The RTS25 is non-handed, so you do not order left or right and you do not have to guess the hand off a drawing that may be wrong. What you do have to fix at order time is the swing type: this is a single acting closer, for a door that swings one direction only. A door that swings both ways needs a double acting unit instead.
3) Does the RTS25 work on a center hung pivot door or only on hinges?
Hinge hung only. The RTS25 package is built for hinge hung aluminum doors and frames, so the closer spindle lines up with a butt or continuous hinge on the jamb, not with a center or offset pivot set. If your leaf is center hung, look at a center hung concealed closer such as the Norton Rixson 608 Series or 700 Series; if it is offset pivoted, the Norton Rixson 0608 Series is the offset hung version.
4) Which spring size do I order on the RTS25 for an ADA barrier free opening?
Two barrier free springs are offered, both sized for a 3'-0" door: BFE for exterior doors and BFI for interior doors. Both give light opening force. If low opening force matters but the opening is not a designated barrier free door, SZ2 is the light opening force option. Pick BFI for interior corridor and restroom doors, BFE where the 3'-0" leaf is an exterior door and has to overcome outside pressure.
5) What is the closest equivalent to the Dorma RTS25 overhead concealed closer for a hinge hung aluminum door?
The RTS25 is a single acting, non-handed overhead concealed closer for hinge hung aluminum doors and frames, rated to 250 lb door weight. The nearest cross-brand equivalent for an aluminum door application is the Norton Rixson 0608, an offset hung overhead concealed closer for aluminum doors up to 200 lbs. The difference that decides the swap is the hanging method: the RTS25 package is built around hinge hung doors, while the 0608 is offset hung, so the door and frame prep is not interchangeable. Confirm how the leaf is hung before ordering either one.
6) The door is center hung, not hinge hung - what overhead concealed closer should be used instead of the RTS25?
The RTS25 package is configured for hinge hung aluminum doors and frames, so a center hung leaf needs a different unit. Center hung overhead concealed options include the Norton Rixson 608 Series for 200 lb doors, the Norton Rixson 700 Series with 200 lbs capacity, and the Norton Rixson 73 Series, a Grade 1 heavy duty center hung closer with cover plate rated to 250 lbs. Of those three, the 73 Series matches the RTS25 on the 250 lb door weight figure.
7) Is there a Grade 1 alternative to the Dorma RTS25 concealed closer for a spec that calls out ANSI Grade 1?
When the drawing calls out Grade 1 overhead concealed, the peers carrying that designation are the Norton Rixson 73 Series, a heavy duty center hung unit with cover plate rated to 250 lbs, and the Sargent 268, 269 and 278, all heavy duty Grade 1 units. The Sargent 268 has a cast iron body, the 269 offers 180 degree opening capability, and the 278 uses an exposed arm. Match the hanging method and the arm type to the opening, since those three Sargent units differ from each other in body and arm construction.
8) The RTS25 is ordered by spring size - what closer can be used instead when the spring power needs to be adjustable in the field?
The RTS25 spring power is selected at the time of order, with SZ2 light opening force, SZ3 standard closing force for 3'-0" to 3'-6" interior and 2'-6" to 3'-0" exterior doors, SZ4 strongest closing force for 3'-6" to 4'-0" interior and 3'-0" to 3'-6" exterior doors, plus BFE and BFI barrier free light opening force options for 3'-0" doors. If the spring power needs to be set after the unit is in the door, the CRL Jackson 20-101M-17 is an adjustable spring power overhead concealed closer body, 105 degree no hold-open.
9) The opening needs to swing past 105 degrees - which concealed closer covers that?
The RTS25 cushion is ordered at either 90 degrees or 105 degrees, and the CRL Jackson bodies follow the same pattern, with the 20-101M-03 at 90 degrees and the 20-101M-01, 20-101M-09 and 20-101M-17 at 105 degrees. For an opening that needs to swing well beyond that, the Sargent 269 is an overhead concealed closer with 180 degree opening capability, heavy duty Grade 1.
10) For a door heavier than 200 lbs, which overhead concealed closers carry the weight?
The RTS25 is rated for a 250 lb door. Among the cross-brand units, the Norton Rixson 608 Series and 700 Series are standard duty and rated for 200 lb doors, and the Rixson 0608 is standard duty for aluminum doors up to 200 lbs. The Norton Rixson 73 Series is the peer that carries 250 lbs, as a Grade 1 heavy duty center hung unit. For a leaf above 200 lbs, the 250 lb rated units are the ones to specify.
11) Why put a concealed closer on an entrance instead of a surface mounted one?
Two reasons drive the choice. Appearance, since the RTS88 unit sits inside the head frame and leaves nothing on the face of the door or transom, which is what architects specify it for. And abuse: it is a common replacement at entrances where surface applied closers keep getting vandalized, because there is no arm or body exposed to be pulled off. The tradeoff is prep. Concealed units need the frame machined, though on the RTS88 most of that door and frame prep happens before the unit goes in, so there is less cutting on site than people expect.
12) Can I get the Dorma RTS25 with a hold open, and what degree of swing does it stop at?
Hold open is a yes or no choice at order time, so specify it up front rather than adding it later. Separately you pick the cushion stop point, either 90 degrees or 105 degrees. Use 90 degrees where a wall, return, or adjacent leaf is close to the door edge and 105 degrees where the door has room to swing wide, for instance a main entrance that carts and deliveries pass through.
13) What is the 5mm extended spindle option on the RTS25 for?
The extended spindle package adds 5mm of spindle length for openings where the standard spindle does not reach far enough into the door top rail, which typically comes up on thicker top rails or where a filler is stacked under the closer. Order it as the package option instead of the standard package. The third package choice adds an 8563 frame cover plate, which is what you take when the head frame cutout needs to be dressed out on the face.
14) What else could I use instead of the Dorma RTS25 overhead concealed closer?
Depends on why the RTS25 does not fit. For a double acting door, the Norton Rixson 73 Series is a center hung double acting concealed closer with a cover plate, Grade 1, also 250 lbs capacity. For a Grade 1 heavy duty concealed unit on a hollow metal or wood opening, Sargent's 268 has a cast iron body and the 269 opens to 180 degrees. The Sargent 278 uses an exposed arm rather than a fully concealed one. On lighter aluminum entrances the CRL Jackson regular duty concealed bodies come in 90 and 105 degree non hold open versions, and CRL Jackson also offers an adjustable spring power body if you want to tune closing force in the field rather than fix it by spring size at order time.
15) I need a concealed closer that holds open and one that does not, on the same building. Do I have to switch brands?
No, the RTS25 covers both from one series. Hold open is an order option, so you can specify hold open units on the doors that need to stay open for deliveries and non hold open on the rest, keeping the same closer, same finish, and same frame prep across every opening. That matters for a property manager standardizing a portfolio, since the maintenance stock and the frame cutout stay identical. Some alternatives lock you in: the CRL Jackson concealed bodies in the comparable range are non hold open only.
16) Can the RTS88 concealed closer go into a wood or hollow metal door, or is it aluminum only?
The RTS88 unit installs in wood, aluminum, or hollow metal doors and frames. The RTS25 package specifically is the hinge hung, aluminum door and frame configuration, so if your opening is hollow metal or wood, you want the package built for that material rather than this one. Get the frame material settled before ordering, because the prep differs and it is done ahead of installation.
17) Which overhead concealed closers hold the door open, and which peers do not?
The RTS25 is ordered with hold open either yes or no, so the function is chosen at the time of order rather than added later. Among the cross-brand bodies, all four CRL Jackson units - the 20-101M-01, 20-101M-03, 20-101M-09 and 20-101M-17 - are non hold open closers. If the opening needs a hold open function, the CRL bodies do not provide it and the RTS25 hold open configuration does.
18) Is the Sargent 278 a substitute for a Dorma RTS25 on an entrance where the closer must stay out of sight?
They are not the same visual result. The RTS25 is a concealed installation chosen where a surface applied unit would interfere with the architectural design, and it is also used to replace surface applied closers on entrances that see vandalism. The Sargent 278 is an overhead concealed closer with an exposed arm, heavy duty Grade 1 - the body is concealed but the arm is visible at the head of the door. For an opening where nothing may show, the exposed arm changes the outcome.
19) What finish options are there on the Dorma RTS25 closer and its cover frame?
Seven finishes, and the choice covers the 8653 cover frame as well as the unit, so the exposed trim matches: 600 prime coat, 689 aluminum, 690 statuary bronze, 691 dull bronze, 693 black, 695 dark duradonic bronze, and 696 gold. For a fleet of storefront entrances, 689 aluminum and 693 black are the two that usually match existing anodized aluminum framing; 600 prime coat is the one to take if the frame is being field painted to a building color.
20) Is the Dorma RTS25 a commercial duty closer or is it meant for residential doors?
Commercial. The RTS25 is a commercial rated concealed closer taking doors up to 250 lbs, with spring sizes running to 4'-0" interior leaves, which is storefront, institutional, and multi-family common area territory rather than house doors. The frame has to be machined for it, so it belongs in aluminum door and frame construction where that prep is planned, not retrofitted into a residential jamb.
21) What is the difference between the CRL Jackson regular duty and heavy duty overhead concealed closer bodies?
The CRL Jackson 20-101M-01 and 20-101M-03 are regular duty overhead concealed closer bodies, the first at 105 degree no hold-open and the second at 90 degree no hold-open. The 20-101M-09 is the heavy duty body at 105 degree no hold-open, and the 20-101M-17 is the adjustable spring power body at 105 degree no hold-open. All four are non hold open closers supplied as a body only in brown, except the adjustable spring power unit, which is listed as a body only without the brown call-out. Choose by the duty level and the degree of swing the opening needs.
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Does the Dormakaba RTS25 105 NHO SZ3 come with a warranty?
Absolutely. The Dormakaba RTS25 105 NHO SZ3 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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