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These Merv 11 filter media are direct replacements for the Aprilaire Spacegard 201 and 401. The new string-less, glued pleat spacing design makes for an easier and faster installation. These replacement filters can be used in the hundreds of thousands of installed Spacegard filters across the U.S. The compact package and repeat business make them a contractor favorite.

Upgrade existing water wasting home humidifiers into water saving, maximum output humidifiers just by changing to the Ultra Upgrade Panel!

Ultra Upgrade Humidifier Panel

ClenAir Universal Humidifier Panels provide optimum moisture output, performance, and durability.

They replace Aprilaire, Honeywell, Carrier, Bryant, Lennox, ICP, and others. Made from quality materials in the USA.

Humidifier Literature

Humidifier Parts Cross Reference Sheet

An Essential Tool for any Glycol Treatment Job.

An accurate and economical tool for ensuring proper levels of glycol treatment in
HVAC fluid systems. Removes guess work and prevents wasteful over-treatment.

All GlycometersTM have metal body with cushioned eyepiece, focus adjustment, and a rubber hand grip. Included with each is a calibration screwdriver & calibration fluid, a plastic pipette, optical cleaning cloth, and a rugged carrying case.

Glycometer Literature

Glycol Percentage Relative to Freeze Point Chart

The Original Hand-Held Illuminated Magnifier

The Magna-Lite magnifies and illuminates hard to see small parts, wiring diagrams, instructions, etc. Ideal for service techs. A must for every tool box! includes optical quality lens, on/off switch, two zinc chloride batteries, long lasting high intensity bulb, complete instructions and lifetime guarantee.