5 Easy Steps to Install a Furnace Humidifier

April 16, 2020

Fast and easy way to install a furnace humidifier to increase your home comfort

The process of installing a humidifier on a furnace to protect your family from dry air is relatively easy, to install this system, a hot or cold water pipe is needed nearby, this is where the main stack of a forced-air furnace is typically connected to, in order to draw water. Some of these humidifiers are heated by the supply air, they add moisture to the surrounding air because they are installed in the return-air duct. The other type of installation process uses a bypass duct in their humidifier in other to move heated air and in the process reintroduce to the air going to the house.

Manufacturers produce a template in which holes can be cut out in the venting when carrying out the installation for either of these systems. In these systems make sure you shut off the furnace before you start, then the Cutting of holes, installation of the humidifier and marking of the template will take about two hours.


Step 1 - Marking & Cutting the Hole

This process makes the use of a template and marker in order to map out a hole in which the humidifier will be installed, this templates and instruction are provided by the manufacturers. To start with the outline is drilled at the corners, then with the instruction from the manufacturer, hole is cut out with aviation snips. Before drilling the screwed hole, the mounting plate must be in position, then it is attached to a mounting plate with sheet metal screws.

Furnace humidifer installation ottawa
Cutting The Hole For The Furnace Humidifier

Step 2 - Mark & Cut Outline of the Humidistat

The instruction manual from the manufacturer is used to know the location of the humidistat, usually they're connected on the cold air plenum above the humidifier. Once the hole is cut out, you will then need to secure the thermostat with the supplied tin screws.

Furnace humidifer installation ottawa

Step 3 - Install Electrical for the Humidifier

Following the instruction in the manufacturer’s manual, connect the humidistat to the furnace control. Some unit makes use of a step-down transformer 120v to 24v, shut down the power if you haven’t done the wiring. Then you can wire the humidistat and install the transformer. The picture bellow shows how this should be wired. if you need assitance call the professionals at Pro Duct Solutions.

Furnace humidifer installation ottawa
Electrical Wiring For A Furnace Humidifier

STEP 4 - Connect The Furnace Humidifier

On the humidistat, attach the humidistat to the solenoid valve using the correct size of the nut, attach the nuts and the wire ends and turn the nuts till they become tight ( but do not twist the ends of the wire).

Furnace humidifer installation ottawa
Installing the Furnace Humidifier

STEP 5 - Install Water Line to The Humidifier

The installation of a saddle valve on a water line is necessary if local codes allow the tapping of water line directly, and then run a line to the humidifier, afterward use the compression fitting to make it speedy. The saddle valve may not be allowed to turn off the water line and install at-fitting. then you can Install a Bypass line (Optional). If you have any dificualties with this step, feel free to contact us.

Furnace humidifer installation ottawa
Water Line Tap
Book an appointment with Pro Duct Solutions

Related Posts

Subscribe to Technician's Blog Posts

Stay informed

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form