FAQ – Frequently Asked Questions


How do I measure for doors?

APEX Plus access doors normally are sized by your “rough opening”; that is, the actual opening in the plenum or air handling unit that the door and frame assembly will fit into. For more detailed information consult the ITM4 drawings for each door model.

How do I measure for viewports?

APEX PlusViewport kits come in a variety of standard sizes (8×8, 8×12 and 12×12)
We recommend you determine the amount of “viewable area” you need, and select the appropriate model of VP. Rough opening size in door to be equal to nominal viewport size (view size) plus 1 5/8″. (Example: 8″ x 8″ viewport to have 9 5/8″ x 9 5/8″ rough opening.)

How long does it take to get these products?

Our standard lead-time is two to three weeks based on the wide variety of standard inventoried components. For special materials and painted products the lead-time could be longer based on availability.

What about prices?

Please call our excellent customer service and we will explain our pricing and quoting process. Our phone number is 763-497-0842.

How do I order?

ITM4 has a general order form that asks all the right questions when ordering doors. We can also assist in quoting jobs for you until you’re comfortable with the process. Since all products are custom and built as needed, once a purchase order is submitted, we will send you an Order Acknowledgment detailing what you are ordering. Customer service is very important at ITM4.

How do I get my order?

ITM4 is open to freight terms based on your preference. Freight Collect or Freight Allowed. ITM4 can also ship International if required.

What about Paint?

ITM4 has the capabilities for powder paint and wet paint applications. Please call ITM4 at 763-497-0842 for more information regarding paint.


How do I create an account?

Visit our member registration page, complete the form, and we will deliver your membership information via email.

I created an account, why can’t I login?

Our member area contains engineering specs that help you create, customize and order our products. Due to the valuable information we provide our memebers, each membership request must be approved prior to gaining access. We normally approve membership requests within 24 hours via email.

I lost my password, now what?

There is a password retrieval system on the login and registration page or by clicking here.

I never received a confirmation email?

Sometimes emails are marked as spam. If you are not receiving emails from us please add to your contacts and check your spam folder. If you continue to encounter problems contact us at( 763 ) 497 – 0842.

I am having trouble opening a Product Specifications or Performance Data file. What do I need?

It is recommended that you use the most recent version of Adobe Acrobat Reader to view our Product Specifications and Performance Data files. These files are saved in PDF format for either online or offline viewing. If you do not have Adobe Acrobat Reader installed, download it here

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Who Uses Our Products?

ITM4 products are in commercial HVAC units around the world. Our APEX Plus and Genesis products are regularly used in medical facilities, government buildings, high tech clean rooms, laboratories, schools, malls and high rises.


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