HE225H8908 Honeywell ByPass Flow-Thru Humidifier

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Honeywell HE225H8908

By-Pass Humidifier w/H8908
12 Gallons Per Day

Price: $148.00

Manufacturer: Honeywell

Quantity:

The Enviracaire Elite HE225H8908 Bypass Flow-Through Humidifier. THE HE225H8908 is a complete system and includes the humidifier, water panel (HC22E1003), bypass cutoff butterfly valve, self-piercing saddle valve, 24 vac transformer, and the manual humidistat H8908 (white).

HE225 overall size 14h x 12w x 9½d". Installation items that are not included are the water line (1/4" copper or plastic tubing), and humidistat wire (2 conductor thermostat wire, 24 gauge). And the 6" round ByPass duct is also not included.

The by-pass humidifier needs to be wired to 24 vac that only comes on when the blower and or heat is on. New furnaces provide a 24 vac connection for humidifiers, see the wiring diagram pasted inside the blower compartment. If a humidifier connection is not provided, an optional current sensing relay can be used to only switch on 24v power when the blower is running.

NuCalgon Water Purifier & Treatment 4704-24

HC22E1003 Enviracaire Antimicrobial Water Panel

The relay is clamped on to the blower wire and has an internal switch that closes when the blower receives current. The blower voltage can be 120v or 240v, only the is amperage important. The internal switch is electronic and can only switch on or off 24 volts, such as any 24 vac humidifier.

The term Flow-Thru refers to water trickling through the water panel and out a drain. The advantages of a flow-thru design is reduced maintenance and no standing water. Scale from calcium and lime gets flushed out of the water panel and down the drain. The water panel is an aluminum mesh with a porous coating that inhibits growth of slime and is easy to change (once a year).

The disadvantage of the Flow-Thru is water usage. We are in the northeast where this is not an issue. We get a flat rate water bill unless there is excessive usage then the rate goes up. The Flow-Thru humidifier does not cause excessive usage.

The Flow-Thru is an evaporative humidifier and requires hot air. If not using hot air then hot water should be used. We see little humidity gain if our Flow-Thru humidifier is operating with cold air (and cold water). We run our blower on constant to best utilize our electronic air cleaner, but our humidifier is wired to only operate only when there is hot air and works very well.

The term By-Pass or Power refers to the driving force behind the air flow. The Power humidifier (aka Fan Power) uses a fan to draw the air thru the humidifier. The ByPass humidifier uses a 6" diameter duct that connects the supply to the return duct.

In the ByPass configuration the air leaving the furnace is routed back to the supply. The warm air leaving the furnace takes this short-cut of least resistance and bypasses the long trip down the duct work, in to the house, and back through the return. The ByPass is the 6" round duct work shown below. During the the hot humid A/C season the ByPass duct should be closed with a butterfly valve since the air flow through the humidifier would not be needed.

The Power humidifier uses a fan to draw air in from the duct and through the humidifier and exhausts back out in to the duct. The air is drawn in through duct at the center of the humidifier and back out in to the duct at the sides. The power humidifier should be mounted in vertical warm air flow.

The HE225 and HE265 are ByPass humidifiers. The HE365 is a fan powered humidifier

In 2007 Honeywell devised a new naming convention for their humidifiers. The HE265 model number now have the humidistat model for the suffix; H8908 or DG115.

The HE265H8908 includes the H8908 manual humidistat. This humidistat is a wall mounted spst switch. The term manual refers to lowering humidity based on outside temperature. Sacrificing humidity with colder outside temps is necessary to prevent windows dripping with condensation.

The HE265DG115 includes the DG115EZIAQ Digital Automatic Humidistat and outdoor temperature sensor. This humidistat automatically adjusts the humidity based on outside temp. Also displays outside temperature and humidity.

The HE265 models prior to 2008 were the Honeywell HE265A1002 and HE265B1005. The HE265A1002 is identical to the HE265H8908 and came with the manual humidistat H8908B1002. The H265B1005 humidifier came with the automatic humidistat H1008A1008.

The difference between the Honeywell HE220A1001 and HE225B1004 is the antimicrobial AgION® water panel. The HE220 humidifiers come with the standard water panel HC22A1007. The H225 humidifiers come with the antimicrobial water panel HC22E1003. The HE220 water panel can be replaced with the HE225 antimicrobial and visa versa.

The HE225 series was introduced under the Honeywell Enviracaire Elite brand. This new brand was designed to be more appealing to the residential customer. The Enviracaire Elite brand has a new bold look of blue and white. The HE220 series was under the traditional Tradeline brand with the slate color scheme. With the success of the new look, the tradeline color scheme was phased out. All current production honeywell humidifiers now have the bold blue and white color scheme.

The HE225 models come with a five year warranty whereas the HE220 models had a one year warranty. See the HE220 or HE225 Owners manual for complete warranty info (page 10).

The indoor humidity level needs to be set based on the outside temperature. This is to prevent water from running down the windows. The cool air near the windows can not hold the humidity and water will condense on the glass. To prevent this condensation, the indoor humidity level is sacrificed by lowering the humidistat.

A manual humidistat needs to be set back as the season gets colder. An automatic humidistat (such as the Aprilaire 56) adjusts the humidity by using an outside temperature sensor.

The Honeywell automatic humidistat (H1008A) determines the outside temperature based on the furnace duty cycle or with an optional outdoor sensor. Below the Honeywell owners manual discusses this feature they call HumidiCalc.

The Honeywell warranty for our new HE225 and HE265 is five years and the HE365 is one year. Our customers simply ship us the defective part. We inspect and test and confirm defective. We then ship back a brand new part.

The problem with humidifiers is typically due to water quality problems. The solenoid will corrode or freeze up with calcium deposits. The solenoid has an inline filter that when clogged with sediment will tear and pieces of the filter will jam the solenoid.