Installation Manual - AirFRAME®
Introduction
Welcome to the AirFRAME® Installation Manual. This guide provides step-by-step instructions to safely install and commission your AirFRAME ceiling system. Please read all sections carefully before beginning the installation. A free instructor-led online training session is also available. Visit the
Installation Contractor Training article for more information on available training sessions.
Safety Precautions
- Read all instructions: Review this manual in its entirety before starting work.
- Qualified personnel: Installation and maintenance must be performed by trained professionals.
- Lockout/Tagout: De-energize all power sources before handling electrical components.
- Personal Protective Equipment (PPE): Use safety glasses, gloves, safety toe boots, fall protections, and any other required PPE.
- Lifting precautions: Use proper lifting techniques. Use caution when working at height and ensure area below is clear of personnel during lifts.
- Lifting equipment ratings: Ensure equipment used to lift and/or move products are rated for the weight of the product.
- Environment: Ensure the installation area is free of moisture, dust, and debris.
System Description
The AirFRAME modular operating room (OR) ceiling system integrates all OR ceiling-mounted components — including ventilation, filtration, integral lighting, and other electrical components, as well as mounting plates, rails or other connection points for medical gas, audio visual, equipment/ lighting booms, and imaging equipment — into factory-assembled modules. The modules are installed as a complete system instead of following the linear process of installing each of these items individually, as is the case with traditional stick-built construction. Components potentially included with the AirFRAME system include:
- AirFRAME (AF) airflow modules
- Outboard (OB) equipment mounting modules
- Rail Channel (RC) rail mounting modules
- Hinged Damper-Diffuser (DD) assemblies
Installation Contractor Training
AirFRAME installations should only be completed by contractors who have been trained by SLD Technology, Inc. Since some installation characteristics can change with custom systems, it is recommended that a contractor training session be booked for each job prior to the job shipping from SLD.
Click Here for Training Information
Supply, Install, and Connect (SIC) Responsibility Matrix
Table 1 represents the responsibility matrix for a typical AirFRAME ceiling system install. Please note that every project is unique, and that this flow can change from region to region, or for a whole host of other reasons. The actual flow for a given project is determined by the general contractor.

Table 1: SIC Matrix
*This matrix represents a typical flow for jobs. The actual flow may vary based on the region, requirements of the job, or other factors.
- Read these instructions carefully before unpacking, installing, and using this system.
- To prevent damage, modules should not be moved into the OR until all demolition, pre-construction, and clean-up in the space is complete.
- Do not unwrap modules until they are ready to be installed.
- Inspect the wrapping of modules for specific tagging numbers indicated by the factory to identify the specific OR where each module is installed.
- Check the unit tag against plans to verify where each module is placed and what direction it faces. The unit tag is typically located on the plan southwest corner of each module but may vary based on project specifics. This tag includes the job number, room identification, and module. Do not mix-and-match modules between rooms.
- Verify that the electrical and mechanical connection points of the AirFRAME system match the drawings and will be accessible before and after installing modules.
- SLD Technology recommends that the unit openings (diffuser and supply air) be covered during construction to avoid entrapment of dust and/or debris inside the air delivery area and/or in diffuser screens and dampers.
- DO NOT install filters (if applicable) until all construction is complete and the OR is ready to be commissioned.
Installing and servicing the AirFRAME modular fully-integrated OR ceiling system can present lifting, system pressure, and electrical hazards. Only trained and qualified personnel experienced in the installation of similar systems should install or service AirFRAME equipment.
Click Here for Training Information.Before connecting an AirFRAME system to power or performing any service on electrical components, always turn off the main power to the system. There may be more than one disconnect switch. Electrical shock can cause personal injury or death.
AirFRAME systems should be carefully installed in accordance with the standards of the National Fire Protection Association, National Electrical Code, and/or any applicable local electrical codes. Authorities having jurisdiction should be consulted before installations are made to verify local codes and installation procedures.
The hinged Damper-Diffuser (DD) assemblies and HEPA filters are expensive long-lead items and should be stored and handled with care. Make sure to keep them safe until installation.
Needed for Offloading Truck
- Forklift or Telehandler with long forks or fork extensions (≥6-foot)
Needed for Moving Modules
- Forklift or Telehandler to move Modules off of shipping pallet to Staging Blocks or Moving/Furniture dollies (heavy duty recommended).
- Standard Furniture Dollies are sufficient for one-time or minimal use; however, AirFRAME modules can weigh anywhere from 300-1800lbs. Wheel bearings on this type of dolly tend to wear out quickly.

Figure 1: Standard Moving Dolly

Figure 2: Heavy Duty Moving Dolly

Figure 3: Low Profile Heavy Duty Moving Dolly
Figure 4: AirFRAME® module on Low Profile Heavy Duty Moving Dolly
- 2x4 and 4x4 wood blocks (can use blocks off shipping pallets)

Figure 5: AirFRAME® modules on shipping pallet

Figure 6: AirFRAME® modules on blocks

Figure 7: Shipping pallet on pallet jack
Needed for Installation
- Material Lifts (minimum of 2. Modules weigh 300-1800lbs each)

Figure 8: Material Lifts
- Chain Fall [aka: Chain Hoist / Chain Block] (2 recommended, 1 minimum)
- Ladders 8 and/or 10' (4 recommended, 2 minimum, at least 1x 10' recommended)
- Plastic Sheeting and vinal tape (for protecting unit once initial install is complete)
- Self-leveling Laser Level (for verifying hanging height)
- Hand Tools:
- Spirit or Digital Level (>3ft recommended)
- Sockets and Wrenches (SLD Ship Loose Hardware is Imperial)
- Wrench 15/16" for 5/8" suspension hardware (ratcheting/speed wrench recommended)
- Impact Gun with 3/4" socket for 1/2" module-to-module hardware
- Wrench 3/4" for 1/2" module-to-module hardware
- Tape Measure (calibrated)
- Drift Pin (for module-to-module alignment)
- Utility Knife
- Pry Bar
- Rubber Mallet
- Rivet Gun
- Caulking Gun
- Wire cutters/stripers
- Torque Wrench with lower limit of at least 23ft-lbs [31.18 newton-meters] (for rooms with Imbedded Unistrut only)

Figure 9: Tools needed
Helpful tools:
3-in-1, hammer, spud wrench, and drift pin in one:
Ratcheting/speed Wrench 15/16" for 5/8" hardware
Site Survey and Environmental Conditions
Move-in path
Walk and measure the minimum height clearance of the move-in path. Keep in mind that in addition to the tallest AirFRAME module, there may be a 4-inch deep electrical enclosure attached to the module as well as any of the the following site constraints to consider:
- Furniture Dolly height (largest module PLUS dolly height) - Low-profile dolly recommended. See Tool section.
- Floor Trim
- Door trim
- Automatic door closing arms
- Access Control locks
Suspension Point Locations
It is important to verify that the suspension point hangers, typically All-Thread Rod (ATR), are placed correctly in the room. Keep in mind that "plan North" does not always match "true North" on a compass. The number of rods should match the number of suspension points of each module. Refer to the
Structural Calculations as well as the suspension point page of the ship loose drawings. Rods should be prepared with a top nut pre-threaded up the rod for installation.
Ceiling Height
The elevation in which the AirFRAME is suspended, ceiling height, is CRITICAL especially so in rooms with ceiling-mounted imaging equipment. Imaging equipment manufacturers (Phillips, Siemens, Cannon, etc.) typically have less than a 4-6mm of tolerance; therefore, it is extremely important to have a verified (by GC, Architect, Engineer, etc.) ceiling height point scribed in the room to measure from (by others, not within SLD scope).
Measuring from the concrete floor at installation can lead to issues with ceiling height in the future. Concrete floors during construction are usually not level and the finished floor can add inches in height. Remember to take into account the finished floor thickness.
General ORs
Typically, General Operating Rooms (those without ceiling-mounted imagine equipment), the ceiling height is the line between where the aluminum lighting grid meets the lighting lens:
Hybrid ORs
In Hybrid Operating Rooms (those
with ceiling-mounted imaging equipment), the ceiling height is the bottom of the
Unistrut Embeds. With most imaging equipment manufacturers, the distance between the top of the table floorplate and the bottom of the Unistrut Embeds is
CRITICAL. Take extra care to ensure proper height during installation. Once the imaging equipment manufacturer's representative comes to verify Unistrut height, the hard-lid ceiling and flooring is typically installed so it can be VERY expensive to raise the whole AirFRAME system or grind the floor and re-install the table plate at that point.
AirFRAME Unistrut Embeds are adjustable in height for small adjustments. Systems ship with a 1mm shim pre-installed and extra shims are sent loose for field adjustments. Unistrut Embeds can be shimmed downwards by inserting shims but can only be adjusted upwards 1mm by removing a single shim. Therefore, it is better to error on hanging too high rather than too low.
Receiving, Inspection, and Storage
Most projects involve multiple ORs with multiple AirFRAME modules per room. Therefore, it is important to keep units wrapped until they are ready to be moved into the OR where they will be installed. The tag numbers on the wrapping provide the most expedient way to identify module groupings by OR, so it can be helpful to group modules by room before beginning to move or unwrap them.
For Receiving, Inspection, and Storage information,
click hereMoving Modules
- Place skid on flat even surface
- Cut banding to modules
- Using forklift or telehandler, pick one unit at a time off the skid and place onto staging blocks or moving dollies.
- Once on dollies, modules can be moved to the work area
- For heavier modules, strap the unit to the dolly to prevent the unit from slipping off
- Alternatively, you can place the whole skid on dollies and move the whole skid into the workspace if there is room.
Unwrapping Modules
- AirFRAME modules are meticulously wiped clean in the factory, then double-wrapped in plastic and boat wrapped prior to shipment.
- DO NOT unwrap AirFRAME modules in a dirty or wet environment. Components should only be unwrapped in a clean dry area.
- Use a utility knife or similar to cut the wrapping along each edge, being careful not to scratch the unit. Ultimately, the wrapping should fold down around the unit.
Use extreme caution when cutting the wrapping of AirFRAME modules to avoid personal injury and/or scratching the powder coat finish and compromising the integrity of the paint.
Hanging Modules
Verify that any lifting equipment is rated for the weight being lifted. Failure to do so can result in equipment damage, personal injury, and/or death. Contact your SLD Project Manager or
support@sldus.com for module weight information.
Protect Material Lift Forks
Leaving material lift forks unprotected WILL scratch and gouge the finished face of the AirFRAME. Protect the forks with foam, carpet, pallet, or other method. AirFRAME units ship with foam between units. That foam can be used for fork protection.
Beware of protrusions on lifting equipment:
Chain Falls
Within the room and in an area out of the way or off to the side of the room so as not to be in the way of raising modules into place, attach two chain falls to the ceiling that are spaced apart the widest module length. Wider is better but slightly narrower is okay.
Rotating Modules
There are multiple methods to reposition AirFRAME modules from their shipping orientation (knife edge on dollies or a pallet jack), to their installation orientation (flat on material lift). SLD ships loose 5/8" eyebolts and/or a manufactured lifting lugs to help with rigging for this manipulation. Eyebolts are most common but a manufactured lifting lug will be provided for modules that are heavier than the compacity of eyebolts which is rare.
Recommended Method
- Install eyebolts or lifting lugs into the suspension points on opposite corners from each other on the module being installed.
- Attach chain fall to each eyebolt or lifting lug.
- Raise chain falls, raising the lower one faster, while one person guides the module into the flat position.
- Once flat, place material lifts under the unit and crank them up into place taking the weight off the chain falls.
- Remove chain falls from unit.
- Move unit while on material lifts into the correct position under the install location.
Alternate Methods
- Raise material lifts evenly, raising the unit into place.
- Ensure a top nut is threaded onto all rods above the point where the top of the AirFRAME will land.
- Guide hanging rod through a fender washer and into suspension holes as the unit is raised. (this washer can be taped to the top nut and lowered later)
- Once the rod is through the suspension hole, install the SLD-supplied plate washer, a fender washer and a nut to secure the AirFRAME to the rod.
- If possible, leave the top nuts loose until the whole system is level and then tighten them down.
It is much easier to feed rods through the suspension holes if each of the all-thread rod drops are cut at a slightly different length, to prevent having to feed all of them through the suspension holes simultaneously.
Videos
System Leveling, Finished Ceiling Height
Standard Rooms
- Begin with one module to make sure it is level and on the plane described in the owner's specification drawings. If module is not level, adjust the module supports that are connected to the roof (or side) of the module.
- Monitor each module and overall SLD dimensions during the course of installation to verify that the overall dimensions match specifications.
- When the system is fully level and dimensionally correct, tighten all bolts to secure each module into place so that they will not move.
- Trim all-thread rod if necessary.
Electrical
Click on the following for information on your lighting package:
Module Penetration Protection
- SLD Technology provides screw tip covers (#3-142-100-TP) for any potential screw penetrations into the sides and top of the modules.
Put a dab of caulk into the cover and twist it onto the exposed end of the screw.
Caulking Requirements
- It is critical that the modules be installed tight against one another as noted in the section on bolting — this is the installing contractor’s responsibility.
- Maintain protocol cleanliness prior to caulking. Thoroughly clean all surfaces on which caulk will be applied, using IPA wipes and the proper PPE as defined in the safety data sheet. We recommend that the same personnel apply the caulk within each module.
- Use an approved primer (Dow Corning OS 1200 Primer) on the surface prior to caulking. Follow product instructions for cure time.
- Completely caulk seams using SLD-supplied DOWSIL 732 multi-purpose white 300ML caulking. After the bead has been applied, tool the caulk — with either a gloved finger or smoothing tool — pressing the length of the bead down into the seam to produce a complete seal. The grid seam must be a continuous seal as it is the final barrier to the sterile field.
- Caulk all bolt locations and structural washer plates , making sure to form a complete seal all the way around. Caulk around all screw tips using SLD-supplied screw tip covers.
- Allow caulking to cure for 24 hours. At this point, the caulk should be cured to a depth of around 3mm.
Corner Cap / Split Cover Installation
- Corner caps and split covers are being phased out but may still appear on projects. Check the Ship Loose Drawings for more details on specific projects.
- Every corner cap and split cover must be sealed to prevent leakage to or from the interstitial space. Provide a contiguous bead of caulk on the back side of the cap/cover, passing all the way around the outside of the screw holes and finishing where started so that there is no break in the seal.
- Align the cap/cover with the appropriate gap in the sidewall of the AirFRAME and stick in place with the caulk, making sure not to compromise the integrity of the caulk seal.
- Using the provided cover/cap self-tapping screws (#18075HWHSD3ZICC), screw the cover/cap into place via the screw holes.
- Cap the exposed screw heads on the inside of the AirFRAME with the provided screw tip covers, making sure to put caulk on the inside of each of the covers before installing them.
- Double-check the caulk seal against the sidewall of the AirFRAME. Fill in any holes as necessary to ensure a continuous seal.
For Perimeter Angle Installation instructions,
Click Here
Field Rivets at Module-to-Module Locations
- If the AirFRAME has been designed with more than one air delivery module, locate the frame rivets (#42BRAW).
- In all locations where two air delivery modules come together, the frame(s) on one side of the split will need to be riveted to the grid on the other side. Using the pneumatic or electric rivet gun, rivet the frame(s) to the grid with the frame rivets, checking that each rivet makes a solid connection, and that the frame remains flush against the grid.
This step is CRITICAL. If missed/neglected, HEPA filters will not seat correctly and leakage can occur around the filters.
For lens logo installation instructions,
Click HereCleaning
- SLD Technology recommends that a 24-48 hour “blowdown” of the HVAC system be performed prior to final cleaning and HEPA filter installation.
- Vacuum and clean the grid of all foreign objects.
- Once the operating room is ready for filter installation, wipe down all grid members with a site protocol-approved cleaning solution.
The light lens material should be cleaned using 100% deionized water only. Alcohol or other cleansers can cause immediate and irreparable damage to the lens material.
HEPA Filters
Receive and Inspect
Prepare site to accept and adequately handle HEPA filters. Please note that, as filters purchased through SLD are drop shipped directly from the filter manufacturer, a 24-hour notice before arrival cannot and will not be given by SLD. Upon arrival, store filters indoors in a clean and dry space.
SLD Technology is not responsible for damage to filters caused by improper storage and/or handling.
Installation
- Install HEPA filters either prior to the installation of the Damper-Diffuser (DD) doors or open the DD cam locks and lower both the diffuser and damper and let hang down.
- Follow the original filter manufacturer’s handling instructions at all times. Do not rack or twist the filter frame or put pressure (even hand pressure) on the filter media at any time. It is recommended, but not necessary, for two people to handle each filter install.
- Rotate the filter clips so that they are free and clear of the knife edge of the diffuser.
- Rest one edge of the filter on the ledge created by the DD hinge and position yourself to lift the filter gel seal into the knife edge.
- Push up on the FRAME of the filter to ensure a proper seal of the filter.
- Rotate the filter clips perpendicular to the grid to support the filter.
- Reverse these instructions for filter removal.
Damper-Diffuser (DD) Door Installation
Keep DD doors safe and within their crate until installation. DD doors are long-lead and expensive to replace as a one-off.
- Locate the DD rivets (#45BRAW) and hinged DD door assembly.
- On the hinge for each DD door, there is a set of rivet holes. Align these holes with the holes located on the DD frame around the vent opening space into which it will be installed (these holes are only located on one side, so the DD door can only be installed in one direction).
- Using a pneumatic or electric rivet gun, rivet the DD door hinge into place with the DD rivets, checking that each rivet makes a solid connection, and that the hinge remains flush against the frame.
- Once all rivets are installed, fully open the DD and allow it to hang downward. Bend the diffuser screen backwards slightly to put a slight backwards arc in its frame. The DD doors tend to settle during shipment and may sag slightly if this step is skipped. Be careful not to apply too much pressure, as the DD screen can be easily damaged.
- Close the DD door, making sure to use all the cam locks to lock it in place. Check that the DD screen finishes flush against the frame.
- If there is a significant gap, repeat steps 4 and 5 until it is resolved.
All balancing components are downstream of the HEPA filter and can be adjusted without removing ceiling diffusers.
- Using a hex key wrench, insert it though the center hole of the Damper-Diffuser screen.
- Turn the hex key to adjust the guillotine slide plate to the desired position.
- Remove the hex key.
Installation Timelapse Videos
AirFRAME should be balanced like a Cleanroom. Our Single Large Diffuser array is more similar to cleanrooms than the traditional Multi-diffuser array. A Velgrid with 4" standoffs is recommended. Flow hoods are not recommended and can lead to difficulty balancing the room. Measurements should be taken at least 2" from the corner slots and an average velocity should be taken across the full array to balance. For more information on balancing, contact our support team.
SLD Technology includes a limited standard warranty which is in effect for eighteen (18) months from date of shipment or twelve (12) months from date of installation, whichever occurs first. For more information, contact our support team.
Support can be reached by:
- Clicking: "Submit a Ticket" at the bottom of this article.
- Emailing: support@sldus.com
- Calling: +1 (503) 744-0002 and selecting option 2
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