At eBay, get this Keystone 26" Wall Sleeve for Through-the-Wall Air Conditioners for $24. It's the best price we could find by $60. It's an open-box unit designed to be fastened securely into a wall opening, including pre-cast concrete or masonry walls, before a through-the-wall air conditioner is installed. Buy Now at eBay

At eBay, get this refurb eufy L50 Self-Emptying Robot Vacuum for $110. It's the best deal we've seen for this model in any condition. It includes a self-emptying base, laser navigation, and a 2-year warranty serviced by Allstate. The vacuum can map 2,000 sq. ft. of space in about 15 minutes using its fast mapping mode. A 2-year Allstate warranty is included. Buy Now at eBay

At Amazon, for Prime members only, the Nuwave Forever Smart Air Purifier is $337, down from its regular $450 price. That's also below the previous Amazon low of $350, so this is an all-time price low. It ships for free. You never have to buy a replacement air filter because the filters in it are washable and reusable. Buy Now at Amazon

The Dyson PH03 has just fallen to $500, which is Amazon's lowest-ever price. That's almost half its original price of $950. This model purifies, humidifies, and cools in a single machine, using a fully sealed HEPA H13 filter that captures 99.97% of particles as small as 0.3 microns. Water passes through a UV light before it's released as mist, addressing the mold and bacteria buildup common in standard humidifiers. The one-gallon tank runs for up to 36 hours before it needs a refill. Shipping is free for Prime members.  Buy Now at Amazon

This is a great deal on the Shark NV752 Rotator-Powered vac is down to just $250 at Amazon. That's $149 cheaper than what you'd pay elsewhere, including at Walmart. It includes a Pet Power Brush, upholstery tool, and crevice tool for tackling pet hair and tight spaces, along with a washable HEPA filter for allergen control. Shipping is free, too. Buy Now at Amazon

Update: The price has changed to $52.63 since this was originally published.

This exhaust fan is priced at $51.63, matching its all-time low on Amazon and well below the $75.44 average price over the past 90 days. It covers up to 1,200 square feet and includes a built-in thermostat that adjusts between 32°F and 130°F across three speeds. Installation only requires a standard electrical outlet. Buy Now at Amazon

The dreame Aqua10 Ultra is $650 with Prime, down from $900. It's $350 less than our mention from June and the best deal we've seen for this model. It includes a self-emptying, self-cleaning dock that washes its mop roller at 212°F and can go up to 100 days between manual dust bag changes. The vacuum also uses 30,000Pa suction and a detangling roller brush designed to prevent hair from clogging. Buy Now at Amazon

At Amazon, get this Lecoolife 10-in-1 Indoor Air Quality Monitor for $66. It's the best price Amazon has charged for this model. It tracks ten indoor readings at once, including PM1.0, PM2.5, PM10, HCHO, and TVOC levels, along with temperature and humidity, displayed on a large color screen with real-time AQI alerts. Buy Now at Amazon

In this sale at Amazon Haul, you'll find deals on a large selection of cheap, clearance home items, cables, tools, apparel, and more. Everything is priced at $5 or less. Shipping is free on Amazon Haul orders of $25 or more. Buy Now at Amazon

At eBay, use promo code "BULLSEYESAVE10" to get this open-box Bell + Howell My Foldaway Rechargeable Fan for $14. It's the best deal we could find by $6. Shipping is free. Deal ends September 1. Buy Now at eBay

At eBay, use promo code "VIPAUGTAKE8" to get this Dreo 2-in-1 TurboPoly Pedestal Fan for $60. It's the best price we could find by $60. It converts between a tabletop and pedestal floor fan, and runs as quiet as 20 decibels while still pushing air up to 95 feet away. Deal ends September 1. Buy Now at eBay

At Amazon, the Active 12-Count Toilet Bowl Cleaner Tablets are $10.77 after an on-page coupon and Subscribe & Save. That's $9 below the original price and the lowest we've seen. Shipping is free for Prime members.  Buy Now at Amazon

eBay's Dyson sale covers certified refurbished vacuums, hair tools, and air purifiers at up to 40% off. Even better, use promo code "BRANDS20" to get an extra 20% off your order. Shipping is free. All refurbs include a 2-year Allstate warranty. Coupon ends August 16. Shop Now at eBay

eufy offers the Robot Vacuum Omni S2 for $1,299.99 after a $200 instant discount via coupon code "WS24T2081111", and an in-cart extra $100 off orders of $1,000 or more. That's $300 off list, $300 under Amazon's current offer, and the lowest price we could find by $300. Shipping is free. The coupon expires September 30. Buy Now at Eufy US

At Amazon, get this Portable Personal Air Cooler Fan for $40. It's the best price Amazon has charged for this fan. It holds a 1200 mL water tank, runs on just 8-10 watts of power, and includes a remote control with an 8-hour timer. Buy Now at Amazon

At Amazon, get the Filtrete 14x36x1 MPR 700 Air Filter 6-Pack for $24.12 when you check out with Subscribe & Save. It's the best deal we could find by $31. Each filter is rated MPR 700, equivalent to MERV 8, and is designed to last up to 3 months. Buy Now at Amazon

Amazon has the Vornado Transom window fan for $63.97, the lowest price we've seen and $36 less than Walmart charges right now. It offers 4 speed settings, an electronically reversible fan mode for both exhaust and intake airflow, and remote control operation. Buy Now at Amazon

Walmart offers the Shop-Vac Brush & Flexible Crevice Tool Attachment Set for $2.40.  That's a $13 low.  Choose pickup or spend $35 to avoid the $6.99 shipping charge. Buy Now at Walmart

This refurbished Shark Matrix robot vacuum and mop is $99.99 at Meh, well under the $248 price for a new one at Walmart. It uses 360° LiDAR mapping to navigate your home and automatically switches between vacuuming and mopping, and it can be controlled through the SharkClean app or with Alexa and Google Assistant. Buy Now at Meh

This BougeRV F02 fan is $40, down from $80. It's the best price Amazon has charged for this model. It runs on a removable 18V 144Wh battery for up to 72 hours of cordless use, or plugs into AC power for unlimited runtime, and includes built-in LED lighting and a 210-degree tilt for flexible placement. Buy Now at Amazon