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Aprilaire 400 / Large Bypass / Mechanical Control / Drainless * Popular *

Aprilaire 400 / Large Bypass / Mechanical Control / Drainless * Popular *

  • Manufacturer: Research Products Corp.
  • Brand Name:   Aprilaire 
  • Model:   400MK
  • Category: Water / Large ByPass / Flow Through / Drainless
  • Rated Capacity:  17 gallons / day
  • Supply Voltage Required: 24VAC
  • Manufacturers’ Order Number:  400MK
  • Included Humidifier Control Type (Humidistat) : Mechanical
  • Humidistat Part Number: RP4655
  • Plenum Opening Required: W= 10″  H= 12.75″
  • Water Efficiency Level: 100%
  • Floor Drain Required: NO 
  • Maintenance Schedule (minimum) : Yearly 
  • Consumables Water Pad Number:  Part # 45
  • Humidifier Nominal Size: W= 16″  H= 16″ D= 10.25″
  • Unit Weight: 11 lbs.
  • Manufacturers’ Warranty: 5 Years

 

  • Manufacturer: Research Products Corp.
  • Brand Name:   Aprilaire 
  • Model:   400MK  (replaces the Aprilaire 445)
  • Category: Water / Large ByPass / Flow Through / Drainless
  • Rated Capacity:  17 gallons / day
  • Supply Voltage Required: 24VAC
  • Manufacturers’ Order Number:  400MK
  • Included Humidifier Control Type: Mechanical
  • Plenum Opening Required: W= 10″  H= 12.75″
  • Water Efficiency Level: 100%

 


 

Purchase Includes Unlimited Technical Support.

Canada-Wide shipping  ( 1-5 day delivery on most orders )

(see shipping estimates in shopping cart)

Ships in : 2 – 3 Days

Our Order Number: HU-102

 

In stock

Price: $278.00

In stock

  • Manufacturer: Research Products Corp.
  • Brand Name:   Aprilaire 
  • Model:   400MK
  • Category: Water / Large ByPass / Flow Through / Drainless
  • Rated Capacity:  17 gallons / day
  • Supply Voltage Required: 24VAC
  • Manufacturers’ Order Number:  400MK
  • Included Humidifier Control Type (Humidistat) : Mechanical
  • Humidistat Part Number: RP4655
  • Plenum Opening Required: W= 10″  H= 12.75″
  • Water Efficiency Level: 100%
  • Floor Drain Required: NO 
  • Maintenance Schedule (minimum) : Yearly 
  • Consumables Water Pad Number:  Part # 45
  • Humidifier Nominal Size: W= 16″  H= 16″ D= 10.25″
  • Unit Weight: 11 lbs.
  • Manufacturers’ Warranty: 5 Years

Description

What is a Bypass Humidifier ?

BY-PASS humidifiers are water based. They will use the pressure difference between the furnace supply plenum  and the return plenum to move air through the humidifier. This is achieved by adding a 6 inch round connecting  duct between plenums (CATEGORY = GOOD)

What is a Fan-Powered Humidifier ?

POWERED humidifiers are water based. They will use their built-in fan to pull air through the humidifier, making them more efficient (CATEGORY = BETTER)

What is a Steam Humidifier ?

STEAM humidifiers will convert regular tap water into pure sterile steam  (CATEGORY = BEST)

What is the difference between  MANUAL mode and AUTO mode ?

Operating in MANUAL mode, your humidistat is configured to measure your indoor return air RH (relative humidity) level within your furnace return plenum. Operating in AUTO mode, your humidistat is configured to measure your outdoor air temperature by utilizing an outdoor sensor.

What is the difference between MECHANICAL and DIGITAL humidistats ?

A DIGITAL humidistat includes an outdoor sensor, and is capable of operating in both MANUAL or AUTO modes. The outdoor sensor installation is optional. Additional costs are usually incurred in order to run the sensor to the outside of your home. A MECHANICAL humidistat is only capable of operating in MANUAL mode.  
 

Documents

Specifications

  • Manufacturer: Research Products Corp.
  • Brand Name:   Aprilaire 
  • Model:   400MK
  • Category: Water / Large ByPass / Flow Through / Drainless
  • Rated Capacity:  17 gallons / day
  • Supply Voltage Required: 24VAC
  • Manufacturers’ Order Number:  400MK
  • Included Humidifier Control Type (Humidistat) : Mechanical
  • Humidistat Part Number: RP4655
  • Plenum Opening Required: W= 10″  H= 12.75″
  • Water Efficiency Level: 100%
  • Floor Drain Required: NO 
  • Maintenance Schedule (minimum) : Yearly 
  • Consumables Water Pad Number:  Part # 45
  • Humidifier Nominal Size: W= 16″  H= 16″ D= 10.25″
  • Unit Weight: 11 lbs.
  • Manufacturers’ Warranty: 5 Years

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Aprilaire 400 / Large Bypass / Mechanical Control / Drainless * Popular *
$278.00
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