Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Do I need a plumber or certified installer to install this humidifier?
Document: It's not hard to install, it's just a pain cutting through the metal ducting.Note: This only comes with the humidistat and the transformer, so you'll either need to also buy the install kit or purchase everything else separately. Since my furnace required the sail switch, I just bought the install kit.A few notes/recommendations:1. The cutout template for the humidifier is on the actual instructions. My humidifier also came with the instructions for HE260A, so make sure you don't use that template.2.
This is a nice unit, you may need a pro to install it if you don't consider yourself handy, or if your heater is not readily accessible.
Easy to install. If you have a newer furnace you probably do not need the swail switch as the HE220A comes with a Humistat which can be connected to the furnace. They recommend the Honeywell 32005847-001 Installation Kit, Bypass which is a little pricey and you can probably buy the pieces of this kit cheaper individually from Home Depot or Lowes or ACO as well as the filters.
You may need to add an outlet overhead or adjacent to the furnace switch to use the supplied transformer.Overall, it seems like this humidifier will perform better than one of those rotating foam drum types and will require less maintenance. The installation does require some skill and an understanding of basic electrical circuitry.
I received the HE220A humidifier package, it is complete with the humidity sensor and fittings, and was easy to install. Its price on Amazon was much lower than the local hardware stores. I am very happy with it.
Had an older version of this model,  the solenoid went out and it was just $20 more to get the whole new humidifier so that is what I did. this way I have extra parts and an extra element too !!!! !it works very easily, easy to install,,, just have to make sure to clean the element from calcium build up  ! !
Purchased this a couple weeks ago and it works very good so far. It comes with a humidistat and I would not waste the money on the install kit. I spent approx. $15 and had all the equipment I needed to install this humidifier. The sail switch that comes with the kit is a waste and prone to failure as well as the transformer as long as you have a furnace that is maybe 15 years old or newer.
Before installing this, I was filling my portable humidifier every day, but the humidity in my house (1,425 sq ft) was around 16%. Now it's around 35%, which is lower than I'd like, but due to the cold temperatures outside, if I raise it any higher I get major condensation on the windows. My furnace is in a small closet with limited access, so it took me nearly 4 hours to install.
The Honeywell HE220A Humidifier was fairly easy to install with the right tools. The needed duct work and baffle must be purchased separately. Cutting into the existing duct work is easy with tin snips and/or a 4"hand grinder fitted with carbide blade. I installed the humidifier in the fall of 2010 and it made a big difference last winter. Our home seemed warmer and more comfortable even though the thermostat temperature was not changed. Also, no dry sinuses all winter long.
Honeywell International HE220A1019 Furnace HumidiferI unpacked this unit tonight, and read over the installation instructions.The wiring information is confusing at best. Looking over the box it came in, I saw that I needed the "Installation Kit" SOLD SEPERATLEY!!!! !I really feel like I want to know upfront that I need to make another purchase to get the whole package. The "Kit" even includes an installation video. No wonder the instructions are poor.I finally found the installation kit.
Answer: yes