{"product_id":"aprilaire-500-small-bypass-evaporative-humidifier","title":"AprilAire 500 Small Bypass Evaporative Humidifier","description":"\u003cp\u003e\u003cstrong\u003eA compact whole-house bypass evaporative humidifier engineered for small-to-medium residential layouts and tight mechanical spaces.\u003c\/strong\u003e The AprilAire Model 500 delivers up to 12 gallons per day (GPD) of humidification for tight homes up to 3,600 sq. ft. Built with a compact 9-1\/2 in. square plenum cutout, the Model 500 easily mounts onto forced-air furnace supply or return ductwork where larger humidifiers cannot fit. Equipped with the Model 60 Automatic Digital Humidifier Control and outdoor temperature sensor, the system continuously adjusts moisture levels based on exterior Ontario winter temperatures to prevent condensation on exterior windows while maintaining comfortable indoor humidity.\u003c\/p\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact mechanical footprint\u003c\/strong\u003e — engineered with a 9-1\/2 in. square plenum opening, ideal for tight furnace mechanical rooms and horizontal or vertical duct runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic digital humidity control\u003c\/strong\u003e — includes Model 60 digital controller and outdoor temperature sensor to prevent window condensation during severe winter freezes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven Model 10 Water Panel technology\u003c\/strong\u003e — heavy-duty expanded aluminum core with porous ceramic coating ensures uniform water distribution and evaporative output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReversible bypass duct collar\u003c\/strong\u003e — 6-inch round bypass duct collar attaches to either side of the chassis for flexible right-to-left or left-to-right airflow configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive hardware kit\u003c\/strong\u003e — includes 24 VAC Class 2 transformer, saddle valve, outdoor temperature sensor, and digital control module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSizing guide\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTight construction (modern building code, 0.5 ACH)\u003c\/th\u003e\n\u003ctd\u003eUp to 3,600 sq. ft. (334 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eAverage construction (typical residential, 1.0 ACH)\u003c\/th\u003e\n\u003ctd\u003eUp to 1,800 sq. ft. (167 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eLoose construction (older heritage structure, 1.5 ACH)\u003c\/th\u003e\n\u003ctd\u003eUp to 1,200 sq. ft. (111 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eAprilAire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e500 Series Evaporative Bypass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eModel \/ SKU\u003c\/th\u003e\n\u003ctd\u003e500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEquipment type\u003c\/th\u003e\n\u003ctd\u003eWhole-house compact bypass evaporative humidifier\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEvaporative capacity\u003c\/th\u003e\n\u003ctd\u003e12 Gallons Per Day (GPD) @ 120°F plenum temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCoverage (tight construction)\u003c\/th\u003e\n\u003ctd\u003eUp to 3,600 sq. ft. (334 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCoverage (average construction)\u003c\/th\u003e\n\u003ctd\u003eUp to 1,800 sq. ft. (167 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCoverage (loose construction)\u003c\/th\u003e\n\u003ctd\u003eUp to 1,200 sq. ft. (111 m²)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHumidifier control included\u003c\/th\u003e\n\u003ctd\u003eModel 60 Automatic Digital Humidifier Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOutdoor temperature sensor\u003c\/th\u003e\n\u003ctd\u003eIncluded (digital proportional reset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eReplacement water panel\u003c\/th\u003e\n\u003ctd\u003eModel 10 Water Panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBypass duct connection\u003c\/th\u003e\n\u003ctd\u003e6 in. round duct collar (reversible left or right)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePlenum opening dimensions\u003c\/th\u003e\n\u003ctd\u003e9-1\/2 in. W × 9-1\/2 in. H (241 × 241 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eUnit dimensions\u003c\/th\u003e\n\u003ctd\u003e15-5\/8 in. W × 13 in. H × 10-1\/4 in. D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eElectrical rating\u003c\/th\u003e\n\u003ctd\u003e24 VAC, 60 Hz, 0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTransformer included\u003c\/th\u003e\n\u003ctd\u003e120 VAC to 24 VAC, 10 VA Class 2 Transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWater feed rate\u003c\/th\u003e\n\u003ctd\u003e3 Gallons Per Hour (GPH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWater supply connection\u003c\/th\u003e\n\u003ctd\u003e1\/4 in. O.D. copper tubing with compression fitting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDrain hose connection\u003c\/th\u003e\n\u003ctd\u003e1\/2 in. I.D. flexible tubing to floor drain or pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWater supply temperature\u003c\/th\u003e\n\u003ctd\u003eCold or service hot water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCertifications\u003c\/th\u003e\n\u003ctd\u003eUL rated, AHRI Guideline F compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch2\u003eBefore you buy\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRequires an existing or field-cut 9-1\/2 in. by 9-1\/2 in. opening on the warm air supply plenum or cold air return duct with 6-inch round bypass ducting.\u003c\/li\u003e\n\u003cli\u003eThe Model 60 Automatic Digital Control must be mounted on the cold air return duct at least 6 inches upstream of the bypass connection for accurate humidity sampling.\u003c\/li\u003e\n\u003cli\u003eInstall the outdoor temperature sensor on an exterior wall facing north or east out of direct sunlight using standard low-voltage 18\/2 wire.\u003c\/li\u003e\n\u003cli\u003eA continuous downward pitch must be maintained on the 1\/2-inch drain hose to ensure gravity drainage to a floor drain or condensate removal pump.\u003c\/li\u003e\n\u003cli\u003eAnnual replacement of the Model 10 Water Panel is recommended at the start of every heating season to maintain rated 12 GPD output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eQuestions about ductwork fitment or humidifier controls? Contact our technical team for assistance.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhich evaporative water panel does the Model 500 use?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eThe Model 500 uses the genuine AprilAire Model 10 water panel, measuring approximately 9.5 inches wide by 9.75 inches high by 1.75 inches thick.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhat are the physical dimensions of the Model 500 cabinet?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eThe compact cabinet measures 15.6 inches wide by 13 inches high by 10.25 inches deep, fitting narrower duct drops where larger humidifiers cannot fit.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eDoes the Model 500 include an automatic digital humidistat?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eYes. The Model 500 includes the Model 60 digital automatic control with an outdoor temperature sensor to prevent window condensation during Canadian cold snaps.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhat bypass duct size connects to the humidifier?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eA 6-inch round galvanized sheet metal or flexible duct connects the humidifier collar to the opposite HVAC plenum with an integrated damper switch.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhat electrical service is required for the solenoid?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eThe 24 V AC solenoid valve is powered by an included 120 V to 24 V 10 VA transformer wired to the furnace control terminal board.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhat water line connection is used?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eConnect a 1\/4-inch O.D. copper or braided supply tube to the domestic cold or hot water supply pipe with the included saddle\/shutoff valve.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhat drain plumbing is needed?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eRoute a 1\/2-inch I.D. flexible drain hose from the bottom drain fitting with continuous downward pitch to a floor drain or condensate pump.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eWhen should the damper be switched to the Summer position?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eSwitch the integrated damper to the Summer (closed) position when the heating season ends and air conditioning starts, preventing conditioned air from bypassing the cooling coil.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"details\"\u003e\u003csummary\u003e\u003cstrong\u003eHow often should the water panel be replaced?\u003c\/strong\u003e\u003c\/summary\u003e\u003cdiv class=\"details-content\"\u003e\u003cp\u003eReplace the Model 10 water panel once per year in early autumn prior to turning on the furnace for the winter heating season.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003ch2\u003eDocuments\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rp.widen.net\/content\/wmftvjfprz\/original\/aprilaire-500-series-humidifier-specification-sheet-381.pdf?u=5rn8it\" target=\"_blank\" rel=\"noopener\"\u003eAprilAire 500 Series Whole-House Evaporative Humidifier Specification Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rp.widen.net\/content\/uw7plaiqy8\/original\/aprilaire-canada-all-products-specification-reference-guide-2258.pdf?u=5rn8it\" target=\"_blank\" rel=\"noopener\"\u003eAprilAire Canada All Products Specification Reference Guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/rp.widen.net\/content\/dx5u1sdttk\/original\/aprilaire-300-400-400m-500-500m-600-600m-700-700m-humidifier-owners-manual-B2209190.pdf?u=5rn8it\" target=\"_blank\" rel=\"noopener\"\u003eAprilAire Model 500 Humidifier Owner's Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003csmall\u003eSpecifications compiled from official AprilAire 500 Series Whole-House Evaporative Humidifier Specification Sheet (Lit. No. 381) and 500 Series Owner's Manual (B2209190). All specifications subject to manufacturer verification. \u003ca href=\"https:\/\/rp.widen.net\/content\/wmftvjfprz\/original\/aprilaire-500-series-humidifier-specification-sheet-381.pdf?u=5rn8it\" target=\"_blank\" rel=\"noopener\"\u003eView AprilAire 500 specifications (PDF)\u003c\/a\u003e.\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Safety Notice:\u003c\/strong\u003e Whole-home bypass humidifiers require cutting into furnace supply\/return plenum and connecting to a water supply. Installation by a qualified HVAC technician is recommended to prevent duct air leakage.\u003c\/p\u003e","brand":"AprilAire","offers":[{"title":"Automatic Digital Control (Model 60)","offer_id":53974509388070,"sku":"500","price":240.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1039\/8521\/7830\/files\/aprilaire_500_1_hero.jpg?v=1792998253","url":"https:\/\/avlshop.ca\/products\/aprilaire-500-small-bypass-evaporative-humidifier","provider":"AVL Shop","version":"1.0","type":"link"}