HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

What size ducane furnace for a 1800 sq ft home, 2 story. Not…

Customer Question
What size ducane furnace...

What size ducane furnace for a 1800 sq ft home, 2 story

Contractor's Assistant: Did you check the furnace's filters?

Yes

Contractor's Assistant: Do you plan on doing the work yourself?

Yes

Contractor's Assistant: Anything else we should know to help you best?

Not I can think of

Submitted: 9 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 2 days by:
11/27/2017
HVAC Technician: airheatman, HVAC Technician replied 9 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,542
Experience: Furnace, A/C and heat pump specialist.
Verified

To begin with, the only way to be sure unit is sized properly is to do a load calculation on the home.THis is known as a Manual J Load Calculation.It is a program where you enter all of the building construction factors such as square footage of home, construction type such as wood frame or brick,how much attic insulation, wall insulation. whether on a slab or up off the ground on peers. the square footage of glass windows and type of windows facing each direction, whether there are covered porches shading windows,number of occupants(figuring 2 per bedroom),number of fireplaces if any, number and type of exterior doors,ceiling types,geographic location and other such factors.For example a 1500 square foot well insulated home with double pane windows on a slab with 8 foot ceilings and very few windows facing north with 2 bedrooms in North Carolina with an average low winter temperature of 35 might only require a 60K btu furnace to properly heat the home where as the same 1500 square home in North Dakota with an average low of 10 degrees.with 9 foot ceilings or if not well insulated and had a lot of glass windows facing north may require as much as 100K btu of heat to properly heat the home.
This takes about an hour and a half to two hours to do a manual J by entering all the construction factors.Most contractors will run a manual J for about 200.00 and add it to the price of the installation.Many states are requiring the manual J in order for permit to be issued and inspected.All new construction requires the manual J.This protects the homeowner and guarantees unit is properly sized.

There are some simple load calculation programs you can use online to get close .

See link:

http://www.loadcalc.net/

Ask Your Own HVAC Question
HVAC Technician: airheatman, HVAC Technician replied 9 months ago

What part of the country are you in and is home well insulated ?I can help with any questions about how to sue the calculation guide, just let me know.

Ask Your Own HVAC Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask airheatman Your Own Question
airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,542
9,542 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

airheatman 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

7,634 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

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,024 satisfied customers

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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

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
What size forced air gas furnace (95%) do i need insulated
what size forced air gas furnace (95%) do i need for an insulated house with 20,962 cubic feet of space? That includes the heated basement (4,600 cubic ft) where the furnace will be located. the house… read more
Tim H
Tim H
Lead building engineer
Vocational, Technical or Trade Scho
1,922 satisfied customers
We are looking at a Trane XV95 furnace, how many btus would
We are looking at a Trane XV95 furnace, how many btus would we need for a 2 level w/basement 1700 sq ft home? One point I might add is that the home is lacking insulation and can get very cold and dra… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Looking to purchase a 95% modulating burner furnace for second
Looking to purchase a 95% modulating burner furnace for second floor , 1800 sq feet. I may later run ducting into 700 sq feet garage. Home is 12 years old with basic insulation and windows. First floo… read more
airheatman
airheatman
HVAC Technician
6 years college
9,542 satisfied customers
I would like to know your thoughts on Kelvinator JT4BD heat
I would like to know your thoughts on Kelvinator JT4BD heat pump. I have to replace my unit and can't afford but so much. also what is the difference between 4 ton and 3 ton… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Replaced my furnace and installed A/C evaporator on furnace
Replaced my furnace and installed A/C evaporator on furnace 4 years ago. Now thinking of adding the outside A/C unit. Do I need to buy A/C condenser unit from same manufacturer? Or are the fittings on… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
What is the HVAC cost estimate for new construction?
What is the rule of thumb for cost estimating a new construction HVAC system? What should an HVAC system consisting of 3 Units x 13 Seer [5 ton] split into 6 zones cost? It is a three story 5500 sq ft… read more
airheatman
airheatman
HVAC Technician
6 years college
9,542 satisfied customers
i live in western ny, my electric highest cost is no mor than
i live in western ny, my electric highest cost is no mor than 5 cents/kw during peak times, i have a 2 story wood barn with r30 in the ceilings and r 21 in the walls, 1800 mtotal sq ft, themo windows … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Im looking to get a heat pump installed in my home and seem
I'm looking to get a heat pump installed in my home and seem to be getting quoted a wide variety of services, prices and size recommendations from different contractors. My house is two stories, 1900 … read more
Wvfan79
Wvfan79
Mecanical Designer & Estimator
High School or GED
775 satisfied customers
I am considering the purchase of a 2-story, 2,600 sf home near
I am considering the purchase of a 2-story, 2,600 sf home near Austin, Texas. The house is currently being served by a single Carrier Puron HE, model # XXXXX serial # XXXXX The tonage is not clear bec… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a Lennox G16Q3/4100-4 (I understand is 100KBTU) furnace
I have a Lennox G16Q3/4100-4 (I understand is 100KBTU) furnace - my home warranty service wants to replace with a Carrier TG8MAA48090 (90K BTU). Should I be concerned that this is less capable model?… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Hi, we have Bryant 340 MAV gas furnace in our home (3600 sq.
Hi, we have Bryant 340 MAV gas furnace in our home (3600 sq. ft). We are looking to finish our basement app. 1800 sq. ft. Can this furnace handle heating the increased living space?… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I just had a home inspection and it was the opinion of the
I just had a home inspection and it was the opinion of the inspector that my AC unit is too small. It is a carrier model #25hba360a300. He said because it's only 3 ton and the house is just over 1900 … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a 350MAV 10 years old. I am going to install a UVC
I have a 350MAV 10 years old. I am going to install a UVC air cleaner system. What size wattage should I use. Any other info would be helpful.… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
what size ductwork should be used for a 60,000 btu gas furnace
what size ductwork should be used for a 60,000 btu gas furnace? Home is 1000 sq ft, one story. Furnace is in basement.… read more
Charles
Charles
HVAC Technician
Associate Degree
91 satisfied customers
My new furnace, a Ducane 95% efficent, was installed by a local
My new furnace, a Ducane 95% efficent, was installed by a local heating supply retailer. The Delta T readings were 126 duct temp, 72 input air temp, and -54 for a differential on his instrument. His c… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
my air handler is a nordyne furnance but my ac outside is a
my air handler is a nordyne furnance but my ac outside is a frigidaire. I have a 4 ton unit but it is not cooling or heating my house like it should. My house is 1800 square footage and it takes too l… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,209 satisfied customers
Im interested in buying the burnham scg8 gas boiler. I have
I'm interested in buying the burnham scg8 gas boiler. I have radiant heated floor in my basement (1800 sq. ft.) and my garage (410 sq. ft.). My gas man said I needed at least 175000 btu and this one h… read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Hello, I am looking to replace an old wall furnace. Its an
Hello, I am looking to replace an old wall furnace. It's an inside wall, natural gas, 1200 sq. ft. application. Does coleman have a unit you would recommend? Thanks, John… read more
Electrifier
Electrifier
Owner - Contractor
Bachelor's Degree
147 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