Indoor Air Quality


HVAC Carbon Block

HVAC Carbon Block

Video Overview


The HVAC Carbon Block can be added to any ducted HVAC System to immediately remove odor and provide cleaner, healthier air to any indoor environment. Using a unique combination of carbon and minerals, the HVAC Carbon Block absorbs many odors and harmful chemical pollutants found in the air inside homes, offices, and other buildings. Simply install the HVAC Carbon Block in the air handler against the outlet side of the existing air filter. A percentage of the system air will pass through the HVAC Carbon Block and over time, all of the system air will be filtered by the HVAC Carbon Block.

HVAC Carbon Block removes many indoor air pollutants including: animal odors, food odors, ozone, tobacco smoke, formaldehyde, body odors, paint fumes, auto exhaust, sewer gases, burnt odors, cleaning chemicals, chlorine, turpentine, cosmetics, mercaptans, ammonia, solvents, alcohol, acetone, printer gases, VOC’s, smog, mildew, and hospital odors.

Packaging Size Nu-Calgon # Clenair #
9½” x 10” x 1½” Carbon Block 61062 CACB10


Using velcro patches (enclosed) or wire ties, install the HVAC Carbon Block in the airflow on the back side of the existing air filter or in the blower compartment so that some system air will pass through the HVAC Carbon Block.

Ideally, it will be installed after the existing filter so the HVAC Carbon Block will not become clogged with dust and dirt, but it can be installed on the inlet side of the filter if there is no other option. If the HVAC Carbon Block becomes clogged with dust before it’s rated service life, it can be brushed clean to improve flow through it.

For systems with ceiling or wall filter racks, the HVAC Carbon Block can be installed on the outlet (back) side of these filters.

One HVAC Carbon Block will treat up to a 10 ton system for 6 to 9 months. For larger systems or severe odor or contamination problems, use multiple HVAC odor blocks.

Literature Downloads

Download the product bulletin and other relevant literature here.

SDS Information

Read and understand the product’s Safety Data Sheet for precautionary and first aid information.