IP Library Granted Patent US 12,480,669
Granted Patent B2
US 12,480,669 · App. 16/824,393 · Granted Nov 25, 2025

Wall mounted bypass humidifier

Inventor: Steven L Wolff (Hamel, MN)
Assignee: RESIDEO LLC
F24F3/14F24F13/0209F24F13/20F24F13/222
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Quick Facts
Patent No.
US 12,480,669
App. No.
16/824,393
Granted
Nov 25, 2025
Kind
B2
Abstract

In some examples, a device is configured to add moisture to an air stream of a heating, ventilation and air conditioning (HVAC) system configured to regulate one or more parameters of a space within a building. The device includes a housing that defines at least part of an air path, where the air path is configured to carry the moisture to the air stream of the HVAC system, where the housing includes a bottom housing formed as a single unit and a top housing configured to be attached to the bottom housing.

Claims (64)

1 . A device configured to add moisture to an air stream of a heating, ventilation, and air conditioning (HVAC) system configured to regulate one or more parameters of a space within a building, wherein the device comprises:

a housing that defines at least part of an air path,

wherein the air path is configured to receive an air stream of the HVAC system, carry the moisture to the air stream of the HVAC system, and carry the moisture to the space within the building,

wherein the housing comprises:

a bottom housing comprising:

evaporative pad support rails configured to hold an evaporative pad in a fixed position such that the evaporative pad divides the bottom housing into an intake section and a discharge section,

wherein the air path is constrained to direct air flow to the discharge section from the intake section and through the evaporative pad;

a top housing configured to be attached to the bottom housing, wherein the top housing comprises:

an intake flange defining an intake port, wherein the intake port is configured to:

mechanically connect to a first air duct;

receive a portion of the air stream from the first air duct; and

direct the portion of the air stream to the air path via the intake section of the bottom housing;

a discharge flange defining a discharge port, wherein the discharge port is configured to:

mechanically connect to a second air duct;

receive the portion of the air stream from the evaporative pad; and

direct the portion of the air stream to the second air duct and the space within the building, wherein a difference in pressure between the first air duct and the second air duct causes air to flow through the air path from the first air duct to the second air duct; and

a water distributor support configured to position a water distributor above the evaporative pad,

wherein the water distributor is configured to deliver water to a top input of the evaporative pad through an aperture in the top housing.

2 . The device of claim 1 , wherein the water distributor is configured to deliver water to the top input of the evaporative pad, causing the water to travel through the evaporative pad from the top input of the evaporative pad to a bottom output of the evaporative pad and causing the evaporative pad to evaporate a portion of the water delivered to the top input of the evaporative pad.

3 . The device of claim 2 , wherein the portion of the air stream received from the evaporative pad by the discharge port includes at least a portion of the water evaporated by the evaporative pad, and by directing the portion of the air stream to the second air duct via the discharge port, the discharge port is configured to contribute to a humidity of the space within the building.

4 . The device of claim 3 , wherein the water distributor is configured to increase an amount of water delivered to the top input of the evaporative pad in order to increase the humidity of the space within the building.

5 . The device of claim 3 , wherein the water distributor is configured to decrease an amount of water delivered to the top input of the evaporative pad in order to decrease the humidity of the space within the building.

6 . The device of claim 2 , wherein the bottom housing further comprises a drain located on a bottom side of the bottom housing, wherein the bottom housing is configured to remove, via the drain, at least a portion of the water output from the bottom output of the evaporative pad.

7 . The device of claim 1 , wherein the top housing is configured to be mounted on a vertical surface separate from the HVAC system.

8 . The device of claim 7 , wherein the vertical surface comprises a wall of the building.

9 . The device of claim 1 , wherein the bottom housing is configured to be mounted on a vertical surface separate from the HVAC system.

10 . The device of claim 1 , wherein the intake port is configured to receive the portion of the air stream from a first side of an airflow device located within an air duct system including the first air duct and the second air duct, wherein the discharge port is configured to direct the portion of the air stream to a second side of the airflow device in response to the airflow device causing air to move through the duct system across the airflow device from the first side of the airflow device to the second side of the airflow device.

11 . The device of claim 1 , wherein the bottom housing is formed as a single piece of material.

12 . A method for adding moisture to an air stream of a heating, ventilation and air conditioning (HVAC) system configured to regulate one or more parameters of a space within a building, wherein the method comprises:

carrying, by an air path defined by a housing of a device, moisture to an air stream of the HVAC system and into the space within the building;

holding, by a bottom housing of the housing of the device, an evaporative pad in a fixed position such that the evaporative pad divides the bottom housing into an intake section and a discharge section, wherein the air path is constrained to direct air flow to the discharge section from the intake section and through the evaporative pad, and wherein the bottom housing is formed as a single unit;

attaching a top housing to the bottom housing;

receiving a portion of the air stream from a first air duct by an intake port defined by an intake flange, wherein the intake port is configured to mechanically connect to the first air duct;

directing the portion of the air stream to the air path via the intake section of the bottom housing;

receiving the portion of the air stream from the evaporative pad by a discharge port defined by a discharge flange, wherein the discharge port is configured to mechanically connect to a second air duct, wherein a difference in pressure between the first air duct and the second air duct causes air to flow through the air path from the first air duct to the second air duct; and

directing the portion of the air stream to the second air duct and the space within the building, wherein the device includes a water distributor support configured to position a water distributor above the evaporative pad, wherein the water distributor is configured to deliver water to a top input of the evaporative pad through an aperture in the top housing.

13 . The method of claim 12 , wherein the method further comprises delivering, by the water distributor, water to the top input of the evaporative pad, causing the water to travel through the evaporative pad from the top input of the evaporative pad to a bottom output of the evaporative pad and causing the evaporative pad to evaporate a portion of the water delivered to the top input of the evaporative pad.

14 . The method of claim 13 , wherein the portion of the air stream received from the evaporative pad by the discharge port includes at least a portion of the water evaporated by the evaporative pad, and wherein by directing the portion of the air stream to the second air duct via the discharge port, the method further comprises contributing to a humidity of the space within the building by the discharge port.

15 . The method of claim 14 , wherein the method further comprises increasing, by the water distributor, an amount of water delivered to the top input of the evaporative pad in order to increase the humidity of the space within the building.

16 . The method of claim 14 , wherein the method further comprises decreasing an amount of water delivered to the top input of the evaporative pad in order to decrease the humidity of the space within the building.

17 . The method of claim 13 , further comprising removing, via a drain located on a bottom side of the bottom housing, at least a portion of the water output from the bottom output of the evaporative pad.

18 . The method of claim 12 , further comprising mounting the top housing of the device on a vertical surface separate from the HVAC system.

19 . The method of claim 12 , further comprising mounting the device on a vertical surface separate from the HVAC system.

20 . The method of claim 12 , wherein the method further comprises:

receiving, by the intake port, the portion of the air stream from a first side of an airflow device located within an air duct system including the first air duct and the second air duct; and

directing, by the discharge port, the portion of the air stream to a second side of the airflow device in response to the airflow device causing air to move through the duct system across the airflow device from the first side of the airflow device to the second side of the airflow device.

21 . A system configured to add moisture to an air stream of a heating, ventilation and air conditioning (HVAC) system configured to regulate one or more parameters of a space within a building, wherein the system comprises:

an evaporative pad;

a housing that defines at least part of an air path,

wherein the air path is configured to receive the air stream of the HVAC system, carry the moisture to the air stream of the HVAC system, and carry the moisture to the space within the building,

wherein the housing comprises:

a bottom housing formed as a single unit, wherein the bottom housing comprises:

evaporative pad support rails configured to hold the evaporative pad in a fixed position such that the evaporative pad divides the bottom housing into an intake section and a discharge section, wherein the air path is constrained to direct air flow to the discharge section from the intake section and through the evaporative pad;

a top housing configured to be attached to the bottom housing, wherein the top housing comprises:

an intake flange defining an intake port, wherein the intake port is configured to:

mechanically connect to a first air duct;

receive a portion of the air stream from the first air duct; and

direct the portion of the air stream to the air path via the intake section of the bottom housing;

a discharge flange defining a discharge port, wherein the discharge port is configured to:

mechanically connect to a second air duct;

receive the portion of the air stream from the evaporative pad; and

direct the portion of the air stream to the second air duct and the space within the building, wherein a difference in pressure between the first air duct and the second air duct causes air to flow through the air path from the first air duct to the second air duct; and

a water distributor support configured to position a water distributor above the evaporative pad,

wherein the water distributor is configured to deliver water to a top input of the evaporative pad through an aperture in the top housing.

Assignments (4)
CHANGE OF NAME Recorded Oct 13, 2025
From: ADEMCO INC.
To: RESIDEO LLC
Reel/Frame 073765/0283 →
CHANGE OF NAME Recorded Jun 12, 2025
From: ADEMCO INC.
To: RESIDEO LLC
Reel/Frame 071546/0001 →
SECURITY INTEREST Recorded Apr 1, 2022
From: BRK BRANDS, INC.; ADEMCO INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 059571/0686 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 19, 2020
From: WOLFF, STEVEN L.
To: ADEMCO INC.
Reel/Frame 052171/0592 →
Continuity (1)
Related Publication 20210293420A1 · Sep 23, 2021
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