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## Heat Loss Calculations - Steffes

www.steffes.com/_literature_31172/Rule_of_Thumb

(Rule Of Thumb Shortcut Methods). Cubic Foot Method for Calculating Heat Loss: ⇨ Homes with a basement: Use 2.4 BTU heat loss/cubic foot for the upper ...

## Rule of Thumb A/C sizing question from Practice Exam - InterNACHI ...

www.nachi.org/forum/f20/rule-thumb-c-sizing-question-practice-exam-4672/

A typical value used for air conditioners is one ton (12,000 Btu /hour) per 500 square feet (46 m2). This does not take into account differences ...

May 4, 2012 ... Since water has a latent heat capacity of about 1,000 BTU per pound, ..... The 1 ton per 1,000 square feet rule of thumb is interesting.

## Over-Sizing of Residential Forced Air Heating Systems - the Cold ...

www.cchrc.org/sites/default/files/docs/FinalReportRHE.pdf

modestly sized, with living areas ranging from 1050 square feet to 2482 square ... “rule of thumb,” common for Anchorage area homes, is 40 btu's heat loss per ...

## Rule of thumb: Sq Ft per ton of A/C - HVAC-Talk

RS Means has some 'rule of thumb' for sq ft per ton. .... 600 BTUs per head & it can 900 BTUs per head if they are active, soulful church, dance ...

## Proper Sizing | Sen Plex Corporation - Oahu Air Conditioning Service

www.senplex.com/size-matters.html

General Rule of Thumb for HVAC heat loads: Residential – 35 Btu's per square foot; Light Commercial – 45 Btu's per square foot; Commercial – 50 Btu's per ...

## Energy Management: Design Rules of Thumb - North Itasca Electric

www.northitascaelectric.com/EM/designrules.html

Jun 6, 2013 ... The design rules below are intended for informational purposes only. ... Plenum heaters can be sized using 8 to 10 watts per square foot with 8 foot ceilings ... 2.75 Btu's heat loss per cubic foot for the upper level and 1.75 Btu's ...

## HVAC Design & Thumb Rules - Scribd

www.scribd.com/doc/18185824/HVAC-Design-Thumb-Rules

HVAC Design & Thumb Rules - Free download as PDF File (.pdf), Text File (.txt) or ... Average Load 200 sq. ft. of floor area per ton 9 people per ton 175 sq. ft. of floor ... Equipment Type Approximate Airflow Rate 1 CFM per 100 Btu/hr output 50 ...

## Dr-Fix-It! Notebook Archive: A Heating Rule of Thumb

www.dr-fix-it.com/arc_heating.html

Aug 14, 2004 ... Dr-Fix-It! Notebook Archive: A Heating Rule of Thumb. ... Next, multiply your building's square footage by each of the multiplier factors. ... signify the Btu-per- hour (Btu/Hr)output range of a furnace for that size and type of house.

## HVAC (Heating and Cooling Systems) | North Carolina Cooperative ...

energy.ces.ncsu.edu/hvac-heating-and-cooling-systems/

Aug 28, 2015 ... 30 – 35 Btu's per square foot, 35 – 40 Btu's per square foot, 40 – 45 Btu's per ... A general rule of thumb is that if your home is well insulated with ...

### How Many BTUs Does a Furnace Need for a House? | Home Guides ...

homeguides.sfgate.com

But there are also "rule-of-thumb" estimations you can use to pick a furnace size for ... At 40 to 45 BTUs per square foot, you'd need a 100,000 to 112,500 BTU ...

### Furnace Sizing Calculator - AC4Life

www.acdirect.com

30 - 35 Btu's per square foot, 35 - 40 Btu's per square foot, 40 - 45 Btu's per ... A general rule of thumb is that if your home is well insulated with newer style ...

### How To Choose a New Boiler - Bob Vila

www.bobvila.com

An easy rule-of-thumb for BTU requirements is to figure that you need about 50 BTU per square foot of interior space in a cold climate; 35 BTU per square foot in  ...