What are the dimensions of the base as a whole and the opening as well?

This base is adjustable to fit most furnaces from most major brands and that there are no concrete dimensions for it or its opening.

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Downflow Furnace Installation Kit

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Online Supply

In stock

Model

NAHA01101SB

55983

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Description

The sub-base kit is designed as a spacing between furnaces and the floor, allowing AirQuest gas furnaces in the downflow orientation to be installed safely on wood flooring.

Product Specifications

More Information
Downflow Furnace Installation Kit
SKU	NAHA01101SB
Weight	20.000000
Manufacturer	Online Supply
Resources	Installation Guide You will need AdobeÂ® AcrobatÂ® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.