# AprilAire 5843 Manual-Control Humidifier Installation Kit

AprilAire’s 5843 installation kit is listed for manual-control whole-home humidifiers in the 400M, 500M and 600M models. It bundles electrical, water-line, drain and bypass-duct components, so it may reduce separate parts sourcing, but the listing’s two-foot bypass duct length is worth comparing with your installation layout.

- [Original product page](https://best-deals.pro/product/aprilaire-5843-manual-control-humidifier-installation-kit)
- [View offer](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Aprilaire
- Model: Whole-Home Humidifier Install Kit
- Category: Home & Kitchen > Appliance Parts & Accessories > Appliance Parts & Protectors
- Price: 41.99 USD
- Previous price: 83.99 USD
- Discount: 50%
- Price checked: 2026-11-14T06:37:04.176Z
- Rating: 4.2 / 5
- Reviews: 144

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Specified for AprilAire 400M, 500M and 600M humidifiers with manual control.
- Kit components cover electrical connections, water supply and drainage, and bypass ducting.
- The stated bypass flex duct length is 2 feet, which makes installation layout an important fit consideration.

## Pros

- Combines relay, wiring, plumbing tubing, connectors, ducting and mounting screws in one listed kit.
- The 25-foot supply tube and 10-foot drain tube provide defined lengths for planning the installation.
- Listed compatibility targets three manual-control AprilAire humidifier models.

## Specifications

### Identity
- Brand: Aprilaire
- Model: Whole-Home Humidifier Install Kit
### Controls and power
- Control methods listed: Touch
- Power configuration: Corded Electric
### Dimensions and installation
- Dimensions listed: 0.5"D x 120"W x 0.5"H
### Materials
- Material listed: Vinyl, Wire - Insulated Copper, Aluminum - Foil, Steel

## Before you buy

- The listing’s dimensions, color, evaporative operation, power and touch-control fields appear to describe a humidifier rather than this installation kit. Its 0 minute runtime is also inconsistent with a kit, so treat those details as unconfirmed. The listing specifies 2 feet of bypass duct, and customer feedback reports that the hose may be too short for some layouts. The stated compatible models are 400M, 500M and 600M with manual control.

## In the box

- Model 50 24V current sensing relay (Included)
- 10 feet of 18/2 thermostat wire (Included)
- 4 twist-on wire nut connectors (Included)
- 25 feet of 1/4-inch OD supply tube (Included)
- 10 feet of 1/2-inch ID drain tube (Included)
- 5/8-inch hose clamp (Included)
- 6-inch round duct collar (Included)
- 2 feet of 6-inch round bypass flex duct (Included)
- Mounting screws (Included)

## A good fit for

- Owners installing a listed AprilAire 400M, 500M or 600M manual-control whole-home humidifier who want the specified electrical, plumbing and bypass components together.
- Buyers planning a furnace-duct installation who can confirm the included duct and tubing lengths suit their layout.

## Less suited to

- Installations using models or control types outside the listed 400M, 500M and 600M manual-control compatibility.
- Buyers who need a bypass flex duct longer than the included 2 feet and do not plan to source additional ducting.

## Customer feedback

Customer feedback describes the kit as helpful for whole-home humidifier installation, but views on quality, value and performance are mixed. A recurring practical concern is that the bypass hose may be too short. That matters because the listed flex duct is 2 feet, so buyers should compare that length with their furnace and humidifier layout before relying on the kit as a complete fit.
- Positive themes: Feedback describes the kit as helpful for whole-home humidifier installation, and some customers say it works well.
- Negative themes: Customers report that the bypass hose may not be long enough for their installation.
- Mixed feedback: Customer perceptions of quality, value and performance are mixed.

## Frequently asked questions

### Which humidifiers is the AprilAire 5843 kit listed to fit?
The listing specifies AprilAire 400M, 500M and 600M whole-home humidifiers with manual control.
### How long is the included bypass flex duct?
The listed contents include 2 feet of 6-inch round bypass flex duct. Customer feedback says the hose may be too short for some installations, so compare it with your planned route.
### What kinds of installation parts are included?
The contents list includes a Model 50 current sensing relay, thermostat wire, wire nuts, supply and drain tubing, a hose clamp, a duct collar, bypass flex duct and mounting screws.
### Does the kit include the humidifier?
The contents list names installation components, not a humidifier. The kit is described as being for installation of a compatible humidifier.

## Alternative options

- [AprilAire 600M Whole-House Humidifier, Manual High Output Furnace Humidifier, Large Capacity Whole-House Humidifier for Homes up to 5,000 Sq. Ft., White](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [AprilAire 5844 Humidifier Installation Kit for Whole Home Humidifiers with Automatic Control, Compatible with Models 400, 500, 600 - Black](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [AprilAire 500M Whole-House Humidifier, Manual Compact Furnace Humidifier, Large Capacity Whole-House Humidifier for Homes up to 3,600 Sq. Ft., White](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [AprilAire 600 Whole-House Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole-House Humidifier for Homes up to 5,000 Sq. Ft., White](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [AprilAire 500 12-gal. Whole-House Small Bypass Evaporative Humidifier with Automatic Digital Control for up to 3,600 sq. ft. + AprilAire Model 5844 Humidifier Installation Kit](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [500MK Whole-House Bypass Evaporative Humidifier with Complete Install Kit, Furnace Humidifier with Manual Humidity Controller, 10%-45% RH for up to 3,600 sq. ft, 12 Gal/Day](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [2.38Gal/9L Humidifiers for Bedroom Large Room, Cool Mist Large Humidifier \| Rotatin...](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [4.2 Gal/16L Humidifier Large Room Bedroom Home 1500 sq ft, Black \| Cool & Warm Mist...](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [Almond-colored Model 56 Automatic Whole House Humidifier Control Humidistat with Ou...](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [500M Whole‑House Bypass Evaporative Humidifier covers up to 3600 sq.ft \| 12 Gal/Day...](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [Model 50 Low Voltage Current Sensing Relay for Whole-House Humidifiers \| Fixes faul...](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [18L/4.75Gal Smart Humidifier Large Room 2000 ft² Humidifier for Bedroom \| 70H Runtime,App & Remote&Touch, 24H Timer, 800ml/h Mist,Auto Humidistat Top-fill Humidifier for Whole House Home Office plant](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)

## Add-ons

- [AprilAire 10 Water Panel Humidifier Filter Replacement for AprilAire Whole-House Humidifier Models 110, 220, 500, 500A, 500M, 550, 550A, 558 \(Pack of 2\)](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)
- [AprilAire H635EZ1 Humidifier Filter/Water Panel Assembly Replacement Kit for AprilAire Whole-House Humidifier Models: 600, 600A, and 600M](https://best-deals.pro/visit/aprilaire-5843-manual-control-humidifier-installation-kit)

## Images

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 1](https://best-deals.pro/i/WNafLVZqjZh6e7JJuMb620WEMnu4fTe0xYzCgceCZnmAfVEsveJb-pBXsQb15pN8FsgAGaVlNT93RyY6z4OroHP-j24mnlE002626TRliBXM2P9i4szYRI0k.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 2](https://best-deals.pro/i/Yvn1VoMwRxPAiE0GQztea-C_VyxV8ze5ife954w_rG44DBenTaUM37boouf0ZCHDUs41WG8jZfXfPymSPlXNZnH4j8JAFmWZpuiIdsm3T-OaMwQJRkMx7qLb.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 3](https://best-deals.pro/i/VrasDaEvOAtFZRoYNDfNoyOynLXssYIjcQMt3XFs601qUBdvq9ebBJyjSCkcvGQwFqO0P6tAxxXcfuQpK8RcHlpZeoxQ-IwguBG__b4aUgAnB7I8YBe749P6.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 4](https://best-deals.pro/i/poASeHL1Ra3acW5unb_jqftUXFM_P0D4957v9x3Pyf8x3vM1mK50qXDuJ-jB3yVrk3D022BBVamGITSVLpQ5vlgJKmkDGxBKTywKv9wni1HyhCOpIUgq2njb.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 5](https://best-deals.pro/i/w0_0uK1PdDgmftHsLrQnjuP25gtTlbmH8OgqSRbp-1d-uayRbmxd5eScSfXqrYzg5G_Wr1hEpt_E_EPJ9bbouNtowhih6lp6PJ3vmCHfZKFypsSH1e4LEIBg.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 6](https://best-deals.pro/i/Nr7IUWZb06--FGrjnVL6nyI_95eqDUz6EVLgXZl9-RDGky0NSUgEHUYNhYeF9qj51ZqEO-8G00FM5hnXJ8PNey4DuNmc9SQ0KJMrCKIwAl4PclBlDg6h6jaU.jpg)

![AprilAire 5843 Manual-Control Humidifier Installation Kit — 7](https://best-deals.pro/i/e6UFAdkJpK7uLWcCMxGseSm_MtZaorooGw_wtxB7lsctClqYLfSenI2UQzG5HcsZIz9SfkGsa7kkl5uhhiz0a3mK8OordFdkkWwDApFbp2WtC6_1ALksyM-t.jpg)