HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I have a 2 ton R-22 Rheem Heat Pump with matching air

Customer Question
handler. It it installed in...
I have a 2 ton R-22 Rheem Heat Pump with matching air handler. It it installed in the upstairs of a 2 story 1880's Victorian house. There old "paper" insulation in the attic (around 10 feet tall) and walls. The downstairs system is a traditional gas split heat and ac system.
Every since the initial system was installed 10 years ago upstairs, it struggles to keep the upstairs around 70 degrees in the summer and sometimes to heat in the winter without auxiliary.
Just found out this week the the unit has a dead compressor so it will need to be replaced. HVAC guy said the cheapest way was just to replace the ac condenser. I questioned him about the struggling ac and he said if we upgraded tonage we would need to replace the entire unit inside as well (which is in the attic). Also, he advised that the duct work may need to be replaced if we increased the tonage. The upstairs of my house is around 1172 sq ft. There are 7 rooms including hallways and the windows are original so they are pretty drafty. There are 10 vents that are running through 6" round flex pipe. There is one single return which I can measure if needed.
Question is; first, does this 6" ducting sound adequate for a 2 ton HVAC system. also, if I replaced the 2 ton with a larger unit, any idea if the ducting would actually have to be replaced?
Submitted: 2 years ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 1 hour by:
11/9/2015
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,163
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, your HVAC man is correct on all counts, You have your choice, you can either add 4 inches or more insulation in the attic, or you can replace the 2 ton system with a 3 ton system, and increase the total air flow through the ducting by 50%... that will mean leaving the 6" ducting in tact on the smaller rooms replacing the 6" with 8" duct on at least 3 of the other rooms. The return air duct will have to be enlarged as well. Your HVAC man sounds entirely capable of deciding on the duct sizes.

If I miss you tonight, I will pick your response up in the morning.

Thanks for letting me work with you. When we are finished, if my answer has been polite, professional,and thorough, please click one of the ratings . If you still need help let me know!. Expert is not paid for assisting you until you rate answer. Feel free to follow up for30 days at no additional cost.

Ask Your Own HVAC Question
Customer reply replied 2 years ago
From my description, does it seem as though a 2 Ton is adequate? Or perhaps the current duct size needs to be increased to accommodate even the 2 ton?
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago

Hello again, if its been running for 10 years, the duct sizes is most likely OK, at 1100 square feet in a poorly insulated 1800's home you will typically need 3 tons, 2 tons for that space in a well insulated modern home would get you by in most areas except very hot and humid areas, then you would need 2.5 tons.

In an older home, especially upstairs, its going to take 3 tons unless you insulate heavily.

Thanks for letting me work with you. When we are finished, if my answer has been polite, professional,and thorough, please click one of the ratings . If you still need help let me know!. Expert is not paid for assisting you until you rate answer. Feel free to follow up for30 days at no additional cost.

Ask Your Own HVAC Question
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,163
9,163 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

Phil is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

9,163 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
I'm installing a condensation pump for a friend, he has dual
I'm installing a condensation pump for a friend, he has dual zones and the condensation pump has a after switch. The thermostat has ABCD connections. I need the common and normally open connections an… read more
Phil
Phil
Mechanical Engineer
9,163 satisfied customers
I replaced my defective Condenser fan. The 3 wiring hookup
I replaced my defective Condenser fan. The 3 wiring hookup on the defective is black to power, purple to defrost board and brown to dual capacitor. The replacement fan a MARS 10728 has four wires. Uns… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Rental hot water tank - serviced and insulated pipes Oct
rental hot water tank - serviced and insulated pipes Oct 2017 by Reliance tech-ice build up at elbows on insulated outside plastic pipe - when fan comes on -can hear running water outside from inside … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Can a condensate pump be used on a 100 gallon a o water
can a condensate pump be used on a 100 gallon a o smith water heater with a pvc horizontal vent system it is a 1/2" outlet at the bottom of heater … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
All my windows have condensation. Can I turn off the water
All my windows have condensation. Can I turn off the water to my G3203-75-2 to lower the humidity? … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Does it make sense that the outside condenser unit for the
Does it make sense that the outside condenser unit for the second story of our split HVAC system is 3.5 ton but the evaporator unit in the attic is 4 ton?… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My high efficiency condensing furnace (Carrier) emits a
My high efficiency condensing furnace (Carrier) emits a terrible eye-stinging odor when heating. The furnace runs quiet and otherwise appears to be trouble free, however I see (and smell) a fresh (wet… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Can I have a condensing furnace in a garage that's only
Can I have a condensing furnace in a garage that's only heated a couple days out of the week? I can install it inside the conditioned space but do I have to keep the garage heated all the time or can … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a heat pump condense unit and it has made this loud
I have a heat pump condense unit and it has made this loud tat tat tat tat tat tat noise (when in heat mode) when it turns on or off. It goes from the condenser unit all the way to hearing in the blow… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
Question about basement insulation... It's not a problem -
It's not a problem - it's a question...we live in the Atlanta area. 3 years ago, we purchased an existing home that has a full, unfinished walk-out basement, which means that the entire north and west side of the basement is above grade. The south and east walls are poured concrete and are below grade. When we bought the home, it had zero insulation in the stud walls on the north and west sides. The concrete walls also were not insulated. However, there was faced fiberglass insulation stuffed between the floor joists in the basement ceiliing … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I have a replacement condenser from Goodman, the original
i have a replacement condenser from Goodman, the original was a variable speed and they have since discontinued it and as a warranty replacement they sent me a different condenser and the wiring is to… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
508 satisfied customers
Condenser not running checked all breakers and thermostat
condenser not running checked all breakers and thermostat settings … read more
travis webb
travis webb
tech.
2,411 satisfied customers
The yellow wire on the blower motor through insulation. It
The yellow wire on the blower motor burnt through insulation. It appears to be 15 years old. Would it be safe to repair the yellow wire and continue to run the motor? The ground wite is hanging loose … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Condensate pump for a-c in split system ran continuously and
Condensate pump for a-c in split system ran continuously and now Lennox furnace Model GS18Q314E-100-5 will not come on. … read more
Phil
Phil
Mechanical Engineer
9,163 satisfied customers
Moved into our new home and they added an AC condenser. In
Moved into our new home and they added an AC condenser. In the mechanical room there is a bundle of three wires that are not hooked up to the main board of the furnace. The bundle goes to the AC conde… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I'm gathering information on wall hung non-condensing
Hi. I'm gathering information on wall hung non-condensing boilers. I am the president of my Brooklyn co-op. We have 8 units in our building and each unit has it's own wall hung (Baxi) non condensing b… read more
Phil
Phil
Mechanical Engineer
9,163 satisfied customers
I'm looking for the best method and type of insulation to
I'm looking for the best method and type of insulation to use in an 1890's home that has non-uniform stud and rafter spacing that ranges from 28"- 34" on center. In this process should I use a vapor b… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
What is the use of insulating suction pipe of compressor? I
What is the use of insulating suction pipe of compressor ? I mean is it useful in package units also ?… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
953 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x