Ruud furnace codes. I need some help figuring out Rheem and Ruud Furnace Error Code 45...

rheem furnace model 801 doesn't fire up - currently showing

Solid bottom. Insulated blower compartment. Low profile 34" cabinet ideal for space constrained installations. Blower shelf design - serviceable in all furnace orientations. Hemmed edges on cabinets and doors. 1/4 turn door knobs for tool less access. Integrated Control board features dip switches for easy system set up.A have a Rheem high efficiency furnace and a couple weeks ago I noticed the furnace acting up. What is happening is the call for heat comes on, burners ignite, fan kicks on, and 2-3 mins later the burners go out and the control board shows status code 13 which means flame lost. The thermostat is still calling for heat when this happens so the …Furnace error diagnostic codes explained. If your furnace is blinking or flashing an error code and you are not sure what it means, this video is a great pla...Nov 26, 2009 · Gas furnace goes through startup cycle, lights, good blue flames, runs 3or4 minutes, blower motor (squirrel cage) doesn't start. Unit shuts down. Model 1012-920A board shows green, another green and a third orange flashing. When unit shuts down board gives 3 green flashes on the second green LED. 3 greens continue until I unplug furnace.Our Ruud gas furnace locks out on a code 2 about every 2 months and has been doing so since the unit was new 3 years ago. ...https://www.alwaysopen.caRuud Furnace Fault CodesCODE: Three LED flashes. PROBLEM: The limit switch is open, or the roll-out control is engaged. FIX: Check for a restricted air vent, loose blower wheel, a defective blower, or a dirty air filter. CODE: Four LED flashes. PROBLEM: The pressure switch is stuck closed, or the switch won't open. FIX: Check for an obstruction in the pressure tubing.Shop OEM replacement parts by symptoms or model diagrams for your Ruud UGRA-07EMAES Gas Furnaces! 877-346-4814. Departments Accessories Appliance Parts Exercise ...The Ruud furnace reset button is designed to restore the system to its default settings and clear any fault codes that may have triggered a shutdown. Its primary function is to provide a simple and quick way to troubleshoot and reset the furnace after a fault condition.The Important Stuff: Furnace short cycling is identified by frequent starts and stops of the furnace, running for less than 3-5 minutes, and can lead to uncomfortable temperature fluctuations and increased energy bills.; Common causes of short cycling include thermostat problems, incorrect furnace size, inadequate airflow due to dirty air …The Ruud Achiever 90 Plus Gas Furnace is a high-efficiency furnace with an AFUE (Annual Fuel Utilization Efficiency) rating of up to 96%. It features two-stage heating, which means it can run at a lower stage for milder temperatures and a higher stage for colder temperatures. This helps improve efficiency and reduce energy costs.Dec 18, 2015 ... I need someone to tell me what to do about the Rheem and Ruud Furnace Error Code 57. Error code 57 is high pressure switch open.Unlocking Furnace Troubleshooting: Master the Art of Reading Error Codes with Our Step-by-Step Guide. Learn how to decode light codes, interpret them, and di...Forum Rules. A have a Rheem high efficiency furnace and a couple weeks ago I noticed the furnace acting up. What is happening is the call for heat comes on, burners ignite, fan kicks on, and 2-3 mins later the burners go out and the control board shows status code 13 which means flame lost. The thermostat is still calling for heat when this ...If your furnace light blinks four times, it’s telling you that your high limit switch is open. Typically, the furnace will go off right before the flashing begins. Or, the fan may run while the burner is off. Thus, you will only get …Hi. I have a lennox 80MGF3/4-100A-11 Furnace. After the furnace kicks on for 30 secs or so, the furnace makes a clicking sound, it never ignites, the flames goes down, and it just keeps recycling with … read moreI have an american standard furnace freedom 90 gas force air furnace. The burner was lighting intermittently for a few days but getting worse. The LED light is flashing 4 times, indicating a limit swi …Exceptional Energy Efficiency Savings: Higher AFUE (Annual Fuel Utilization Efficiency) ratings mean more energy savings and this 97% AFUE, ENERGY STAR ® certified gas furnace is close to perfect when it comes to efficiently converting gas to heat—offering up to $85 in annual energy costs savings and potentially even more with available rebates.https://www.alwaysopen.caRuud Furnace Fault Codes10 – 1-hour lockout: This shows that the furnace is in a one-hour lockout after multiple ignition or flame detection failures. 11 – Failed ignition: Detected when the furnace fails to ignite, which could be due to problems with the igniter or gas supply. 12 – Low flame sense: The flame sensor is not detecting a strong enough flame ...Follow these steps to reset your furnace: Make sure the furnace is not currently running and the power is turned off. Locate the reset button on your furnace. Press the reset button and hold it down for approximately 10 seconds. Release the reset button and wait for a few minutes. Turn the power back on to the furnace.R95TC0851521MSA Parts & Furnace Model Repair Help. Find the right Ruud Furnace Model R95TC0851521MSA replacement parts for your repair. Filter results by part category, part title and lawn mower symptoms. You can also view R95TC0851521MSA parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model.Ruud Furnace Error Codes. 0 – Standby: Indicates no faults and that the furnace is in normal standby mode. C – Compressor on: This appears when the compressor is active, …QR code for quick access to product information from your smart phone or tablet; Constant Torque electrically commutated motor; This furnace does not meet air district requirements of 14 ng/J NOx emissions limit, and thus is subject to a mitigation fee of up to $450. ... Ruud makes it easy to find a financing option that works for you!Three or Four Blinks. Three LED blinks with a two-second pause indicates the limit switch is closed. A limit switch is a safety feature directly wired into the furnace; it stops a furnace from overheating if air isn't properly flowing through the heat exchanger. If the switch is closed, debris might be clogging the filter or the blower fan housing.Welcome to TWINTECH Heating & Cooling. Keeping families comfortable for over 30 years. Check out our seasonal promotions. TWINTECH is a full-service HVAC care and maintenance provider located in Durham, Ontario. The company is owned and operated by Grant and Greg Dainty, third generation HVAC technicians. Over the years, TWINTECH has developed ...With a call for heat you should have 28-80 volts AC. Actual voltage depends on which control board and I do not know the specific range on yours. If no voltage then the board is bad. To check the microamps disconnect the wire on the flame sensor and put the meter between the sensor and the wire (set to DC microamps).Find the replacement parts you need for your RRKA-A package gas-electric unit from Rheem, the global leader in heating and cooling solutions.Soft lockout occurs when the furnace tries to light 3 times and fails or if the system loses the pressure switch vacuum during a heat call. It will run the blower and turn off the burners for one hour and then reset and try to reignite the furnace. Turning high voltage off to the furnace also resets the 1 hour lockout.Condenser fan is not running. Return air duct has substantial leakage. If low pressure switch is present, check flash code (1) information. CODE: Yellow "ALERT" Flash Code 3. RESULT: Short Cycling Compressor is running only briefly. FIX: High head pressure. Thermostat demand signal is intermittent.However, on average, a Ruud furnace can last between 15 and 20 years with proper maintenance. Factors that can affect the lifespan of a furnace include how often it is used, the climate in which it is located, and how well it is maintained. For example, a furnace used frequently in a cold climate may have a shorter lifespan than a furnace used ...If this is the case, you should set the control knob to “pilot” and try the burner again. If the flame still doesn’t appear, you may need to call a furnace repairman to come to look at the furnace. Reset the Electronic Controls. First, unplug the furnace, and then wait at least 10 minutes before you do anything else.Quick answer: For most Rheem models and all those made recently, the serial number begins with a letter followed by 9 numbers. The first two numbers after the letter represent the week of the year, 1 through 52. The second two numbers (numbers 3 and 4) are the year. So, W 2210 represents the 22 nd week of 2010.View and Download Rheem 96V Series installation instructions manual online. 4 position condensing two-stage, communicating gas furnaces w/ecm blower. 96V Series furnace pdf manual download. Also for: 96mdv series.A ton of air conditioning equals 12,000 BTU, and 24 divided by 12 equals 2, so the data plate below indicates the system is 2 tons. Here's a rundown of the range you will encounter: 18 = 1.5 tons, 24 = 2 tons, 30 - 2.5 tons, 36 = 3 tons, 42 = 3.5 tons, 48 = 4 tons, and 60 = 5 tons. If you are unsure whether you have found the right two ...You can also view UGRA-06EMAES/Serial: DG parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model. For additional assistance, please contact our customer service number at 1-800-269-2609, 24 hours a day, seven days a week or send us a message ...Find the most common problems that can cause a Ruud Furnace not to work - and the parts & instructions to fix them. Free repair advice!There are several furnace modifications presented in the code tables. Besides Goodman fault codes, there are the messages which can also appear, status and data related to these codes. This information can give you the idea about any necessary further actions - for example, 3 flashes mean that Goodman pressure switch stuck open, and 2 flashes ...05 - Ruud Furnace Igniter. The igniter gets very hot and glows bright orange to light the gas burner. If the igniter fails, the gas won't continue to be ignited and the furnace may start then stop. To determine if the igniter is faulty, remove the igniter and inspect it for cracks. If the igniter is cracked, replace it.RUUD Funace - Won't stay LIT. Furnace Info - RUDD Model UGED - 10ERAJS SERIAL BU5D707 M5092 4609. BTU 105,000 Natural Gas , It's an Upflow Furnace , 90 Plus High Efficiency. Thermostat in house - Honeywell , Small rectangular, manual (no high tech digital or programmable) , one side has Heat / Cool / Off switch , other side has Fan switch ON or ...1-866-720-2076. Available between 7AM - 7PM Central Time. 7 days a week. Request Installation Estimate. 1-866-720-2076. Available between 7AM - 7PM Central Time. 7 days a week. Remove From Ruud Mailing List.Jan 17, 2024 · You might see such an LED code, only if you are a proud owner of a twinned furnace. Not all units have such capabilities. The furnaces manufactured by Rheem that can be twinned are used in one house together on the same thermostat and ductwork.Show all Ruud Furnace manuals . Heat Pump. Models . Document Type . Achiever RACL2240CBZ . Installation Instructions Manual. Endeavor Line Achiever Plus UA16AZ Series . Installation Instructions Manual. Endeavor Line Achiever Plus UA16AZ24AJ3CA ...I had a new ruud furnace super quiet 80 installed last year what a piece of junk! I have had the HVAC Technician out 4 times two times last year so fare 2 more times this year and it is not even January yet. It will only get up to 60-65 degrees It will only flame up for 10 to 15 seconds. The Technician was out last week and it started working.Ruud Furnace Model UGPN-07EAMER Parts. Ruud Furnace Model UGPN-07EAMER Parts are easily labeled on this page to help you find the correct component for your repair. Filter results by category, title and symptom. You can also view diagrams and manuals, review common problems that may help answer your questions, watch related videos, read insightful articles or use our repair help guide to get ...I have a ruud ultra series natural gas furnace. it will not. i have a ruud ultra series natural gas furnace. it will not light the burner when it tries. it is flashing code 45. what it wrong … read more. airheatman. HVAC Technician. 20,813 satisfied customers. RUUD Ultra Series Model UPRL024JEC. Trouble code blinks.As the e-cig maker's market share evaporates, Elon Musk calls Tesla's gigafactories “giant money furnaces.” Good morning, Quartz readers! The US Federal Reserve acknowledged rising...See if power is reaching the motor. If it is, but the motor isn’t running, replace the motor. If the motor runs but air doesn’t move, the connecting belt has snapped. Replace the belt. Blowing too much air? Your furnace’s blower motor is continually being sent voltage due to a failed relay on the control board.QR code for quick access to product information from your smart phone or tablet; Compatible with single or two stage thermostats. For optimal performance a two stage thermostat is recommended. This furnace does not meet air district requirements of 14 ng/J NOx emissions limit, and thus is subject to a mitigation fee of up to $450.EcoNet and Flash Codes. Inverter Product. A957_O Low Refrigerant Pressure . System has tripped the low pressure threshold 3 times in one call. Unit will be locked out for one hour Check Refrigerant Charge Check for Restrictions in liquid or suction lines, drier, strainers etc. T958_O High Refrigerant Pressure .You can also view UGDG-10EAMEA parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model. For additional assistance, please contact our customer service number at 1-800-269-2609, 24 hours a day, seven days a week or send us a message using the live ...The Ruud Achiever 90 Plus Gas Furnace is a high-efficiency furnace with an AFUE (Annual Fuel Utilization Efficiency) rating of up to 96%. It features two-stage heating, which means it can run at a lower stage for milder temperatures and a higher stage for colder temperatures. This helps improve efficiency and reduce energy costs.Oct 27, 2019 · THe two codes are about entirely different things. THe 12 indicates we had a low flame sense. Usually caused by either a dirty flame sensor nor sensing fire or low flame caused by low gas pressure or a bad gas valve.If the light gives one blink, the gas supply valve needs to be turned on. If there are two or three flashes, the pressure switch is closed. Open the switch near the black tubes next to the drain. If there are more than three flashes in a row, address a professional technician. Turn the gas control off and disconnect the furnace from the mains.Gas and Oil Home Heating Furnaces - Ruud Furnace - Intermittent Problem - Ruud Silhouette II Furnace installed about 1999 (we bought house in 2005). We do NOT have a manual. ... On the inside cover of the furnace should be a list of the fault codes. Upvote #3 11-09-14, 06:05 PM B. bamagal. Member. Thread Starter. Join Date: Nov 2014. Location ...FORM NO. G22-540 REV. 8. Gas Furnaces U96V Series. Rely on Ruud.™. † 96% residential gas furnace CSA certified † 4 way multi-poise design † Two stages of operation to save energy and maintain optimal comfort level. † Variable speed blower motor technology provides ultimate humidity control, quieter sound levels, and year round …Ruud replacement gas furnaces are one of the more affordable home heating options for new gas furnaces. Installation costs for a new Ruud furnace can range from $2,500 to $3,578. On average homeowners should expect a standard efficiency Ruud furnace like the Ruud Ultra U802v with an 80% AFUE rating to price out at $925 for the HVAC unit alone ...Am servicing a Ruud furnace model # R95PA0851521MSA and then circuitboard code says twinning failure (code 20) when there is no twinning with this instillation. The furnace worked fine last season and …I have an american standard furnace freedom 90 gas force air furnace. The burner was lighting intermittently for a few days but getting worse. The LED light is flashing 4 times, indicating a limit swi …Installation costs for a new Ruud furnace can range from $2,500 to $3,578. On average homeowners should expect a standard efficiency Ruud furnace like the Ruud Ultra U802v with an 80% AFUE rating to price out at $925 for the HVAC unit alone and $2,735 in total installation costs after labor. See our list of Ruud furnace prices by model listed ...The Ruud Achiever Series with Dual Comfort Control two-stage gas furnace features a new two-stage gas valve that delivers fuel to the burner at 1 of 2 rates to maintain the desired temperature. On the coldest days, the furnace will operate at 100-percent capacity. On other days, the furnace operates at 70-percent capacity to help reduce energy ...View and Download Rheem 05EAUER manual online. RGPQ- Series Classic Series Two-Stage Upflow/Horizontal Gas Furnaces. 05EAUER furnace pdf manual download. Also for ...Status LED DESCRIPTION; Heartbeat: Control has 24 VAC power: 2 Flashes: Pressure switch did not open, check for obstructed pressure tubing: 3 Flashes: Pressure switch did not close, or re-opened- Check for: excessive wind, proper vent size, defective inducer motor, low inducer voltaqe, defective pressure switch, inadequate combustion air supply, disconnected or obstructed pressure tubing, low ...95% Single Stage Multi-Position Gas Furnace Installation Instructions. Date Document Large File Document Downsized File; December 2017: 92-24161-120 Rev. 16 File Size 33.60 MB : March 2017: 92-24161-120 Rev. 15 File Size 33.60 MB : January 2017: 92-24161-120 Rev. 15 File Size 33.60 MB : August 2016:I need help figuring out Ruud furnace error codes.If all the lights are dead, the problem is the power or lack thereof. Check that the furnace is on, and if ...A ton of air conditioning equals 12,000 BTU, and 24 divided by 12 equals 2, so the data plate below indicates the system is 2 tons. Here's a rundown of the range you will encounter: 18 = 1.5 tons, 24 = 2 tons, 30 - 2.5 tons, 36 = 3 tons, 42 = 3.5 tons, 48 = 4 tons, and 60 = 5 tons. If you are unsure whether you have found the right two ...The igniter gets very hot and glows bright orange to light the gas burner. If the igniter fails, the gas won't continue to be ignited and the burners won't stay lit. To determine if the igniter is faulty, remove the igniter and inspect it for cracks. If the igniter is cracked, replace it. If the igniter is not cracked, use a multimeter to test ...Hot gas sensor defective, if present. CODE: Yellow "ALERT" Flash Code 4. PROBLEM: Locked Rotor. FIX: Run capacitor has failed. Low line voltage (contact utility if voltage at disconnect is low). Excessive liquid refrigerant in compressor. Compressor bearings are seized. CODE: Yellow "ALERT" Flash Code 5.Please look up the code description that is located on the furnace panel. You may have to look on the back of the panels. Ask Your Own HVAC Question. Customer reply replied 14 years ago. ... I have a UGED 10ERAJS RUUD furnace, it has caused me alot of grief over the years, but has been working just fine until 2 days ago. ...CODE Description; 0: Standby: C: Compressor on (cooling or heat-pump heat) H: Gas heat on: F: Continuos fan on: 10: 1 hour lockout: 11: Failed ignition: 12: Low flame senseThis fault code indicates that the flame could not be established. This no-light condition occurred 3 times (2 retries) during the call for heat before locking out. Low gas pressure, faulty gas valve, dirty or faulty flame sensor, faulty hot surface ignitor or burner problem may cause this.Rely on Ruud.™ 3 WARNING THIS FURNACE IS NOT APPROVED OR RECOMMENDED FOR USE IN MOBILE HOMES DIRECT SPARK IGNITOR IN-SHOT BURNERS DRAFT INDUCER MOTOR PATENTED HEAT EXCHANGER INTEGRATED FURNACE ... Furnaces must be vented in accordance with the National Fuel Gas Code, ANSI Z223.1 and/or Can/CGA-B149 Installation Codes and in accordance with ...Here are the most common reasons your Ruud furnace isn't heating - and the parts & instructions to fix the problem yourself. We make fixing things easier! En español. 1-800-269-2609 24/7. Your Account. ... Furnace Parts Packaged Unit/RTU Parts Heat Pump Parts Central Air Conditioner Parts Air Conditioner Parts.View and Download Rheem 96V Series installation instructions manual online. 4 position condensing two-stage, communicating gas furnaces w/ecm blower. 96V Series furnace pdf manual download. Also for: 96mdv series.80% furnaces, U96V two-stage, variable-speed 96% furnaces and U97V modulating furnaces. † PlusOne® Expanded Valve Space - 3"-4"-5" service valve space - provides a minimum working area of 27-square inches for easier access † PlusOne® Triple Service Access - 15" wide, industry lead-ing corner service access - makes repairs easier ...Just installed this RUUD Furnace in my home it runs for 4 to 8 hours and just quits. ... Trouble code blinks between L and 29. Room became hot while blower was on and thermostat was calling for cooling. Found compressor fan to be off. Turned off system, ...Tech Tip on the error code for a furnace pressure switchStarts and stop a problem with Ruud Furnace. When your furnace doesn’t heat, it could be due to a faulty flame sensor. If this occurs, you should clean your flame sensor with a regular household cleaning pad to remove any buildup there may be on it. This will enable the sensor to detect when the gas ignites.If you flipped the main breaker, ignore the room-specific breakers and just flip the main. 2. Turn the electricity to your furnace back on and wait 30-45 minutes. Once you’ve confirmed that the electricity in the room is working, flip the switch for the power on your furnace and wait 30-45 seconds for it to turn on.Please help find the manual for this Ruud Furnace. Ruud Furnace afg. 0 Solutions. wiring diagram for a oil furnace model number uobc. Ruud Furnace uobc-095qbea. 0 Solutions. ... led diagnostic codes. Ruud Furnace ugph-05auer. 0 Solutions. Page 1 of 14 Ask A Question Request A Manual. Sponsored Listings. Loading Products...If the light gives one blink, the gas supply valve needs to be turned on. If there are two or three flashes, the pressure switch is closed. Open the switch near the black tubes next to the drain. If there are more than three flashes in a row, address a professional technician. Turn the gas control off and disconnect the furnace from the mains.Gas Furnaces R96P Series Ruud Achiever Plus® Series Two Stage Multi position Gas Furnaces Achiever Plus Series Two Rely on Ruud.™ FORM NO. G22-539 REV. 5 R96P- Series 96% A.F.U.E.†* Input Rates from 40 to 115 kBTU [11.72 to 33.71 kW] †A.F.U.E. (Annual Fuel Utilization Efficiency) calculated in accordance with Department of Energy test ...Code 6: The Unexpected Flameout – Soft Lockout. The soft lockout, signaled by six flashes, occurs when the furnace unexpectedly extinguishes during operation. This could be due to problems with the gas supply or the flame sensor. A professional inspection is advised to uncover and solve the underlying issue. Code 7: Rollout Switch Alert – OpenTo find the age of your Ruud Furnace, refer to the table below. Match the first letter of the serial number with the corresponding year range. For example, if the serial number begins with 'S', it was made between 1985 and 1989. Keep in mind, this table only works for Ruud Furnaces made in North America.Leave it off for about 30 seconds and then turn it back on. This will clear the board and the unit will try to restart so you can watch to see what's happening. Be sure to get the code the furnace is giving you before you cut the power. This code will be lost once the unit is powered down.Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the Air-Conditioning, Heating, & Refrigeration Institute.Hi we have a Ruud furnace and the code on the thermostat reads A033_F Over temperature switch roll out open. Is there a way to reset this? The blower works but won't ignite. Contractor's Assistant: Just to clarify, do you think this is a larger HVAC problem, or something specific to the thermostat? We ran out of LP Gas and we have done the recommended restart process, but it won't work.Starts and stop a problem with Ruud Furnace. When your furnace doesn’t heat, it could be due to a faulty flame sensor. If this occurs, you should clean your flame sensor with a regular household cleaning pad to remove any buildup there may be on it. This will enable the sensor to detect when the gas ignites.ruud furnace. I have a ruud achieve 90+ that shows code 57 when I press the interlock, small motor spins up and then 3 sec later shows H for 4 sec, no clicking at all. Then back to 57. No heat. Help … read moreI have a rheem gas furnace that just began showing code 26, for " line and neutral reversed." ... 19,560 satisfied customers. I have a Ruud 92% eff furnace that's been operating for 4. I have a Ruud 92% eff furnace that's been operating for 4 years, There's been no changes electrically to the furnace or house. Now I am getting a code 26, saying ...FORM NO. G22-540 REV. 8. Gas Furnaces U96V Series. Rely on Ruud.™. † 96% residential gas furnace CSA certified † 4 way multi-poise design † Two stages of operation to save energy and maintain optimal comfort level. † Variable speed blower motor technology provides ultimate humidity control, quieter sound levels, and year round energy ...My ruud furnace has code 11. failure to ignite. I took off. my ruud furnace has code 11. failure to ignite. I took off bottom panel to reset. it trys to spark, but won't ignite. I put a volt tester next to wires and I get no indication that there is power ...Am servicing a Ruud furnace model # R95PA0851521MSA and then circuitboard code says twinning failure (code 20) when there is no twinning with this instillation. The furnace worked fine last season and the air conditioner worked fine this summer. Efforts to call your service line have been met with failure.. ruud furnace. I have a ruud achieve 90+ that shows code 57 whIf the flame sensor does not detect a flame, the co Ruud Furnace Model UGFD-07EMCKS Parts. Ruud Furnace Model UGFD-07EMCKS Parts are easily labeled on this page to help you find the correct component for your repair. Filter results by category, title and symptom. You can also view diagrams and manuals, review common problems that may help answer your questions, watch related videos, read insightful articles or use our repair help guide to get ... Brand Furnace Efficiency Stages of Heating Mot Ruud Achiever Plus® Series Two Stage Multi position Gas Furnaces Achiever Plus Series Two Rely on Ruud.™ FORM NO. G22-539 REV. 5 R96P- Series 96% A.F.U.E.†* Input Rates from 40 to 115 kBTU [11.72 to 33.71 kW] †A.F.U.E. (Annual Fuel Utilization Efficiency) calculated in accordance with Department of Energy test procedures. *Up to 96% A.F.U.E. As a Category I furnace, it may be vented vertically with ...

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