BTU Calculations - HVAC - DIY Chatroom Home Improvement Forum

 DIY Chatroom Home Improvement Forum > HVAC BTU Calculations
 Register Blogs Articles Rewards Search Today's Posts Mark Forums Read

03-28-2012, 07:31 PM   #1
Member

Join Date: Jul 2011
Posts: 1,378
Rewards Points: 500

## BTU Calculations

Anyone have a good site and/or formula for BTU calculation loads?

I'm researching ventilation air heating requirements and am trying to find out:
640cfm @ delta T 15 deg. F rise (100% humidity) = ?BTUs?
640cfm @ delta T 15 deg. F rise (50% humidity) = ?BTU?

It's for intake air from a geothermal source (55 dwg. F +/-) being brought to room temp (70 dwg. F +/-) with the varying humidity loads. I'm not looking for exact stuff, just theoretical schematic planning stuff...Thanks!

__________________
Life's too short...so enjoy it!

03-29-2012, 04:23 AM   #2

Join Date: Oct 2008
Location: Somewhere
Posts: 34,584
Rewards Points: 8,154

(TR*1.08)*CFM=BTU

15*1.08=16.2
16.2*640=10,368 BTUs of heat.

The humidity won't matter, 100%RH compared to 50%RH has less then a 20 BTU an hour difference.

 The Following User Says Thank You to beenthere For This Useful Post: AGWhitehouse (03-29-2012)

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Thurman Electrical 3 12-30-2010 08:30 AM mark2007 HVAC 1 05-25-2010 08:09 AM MartinD Electrical 10 01-26-2010 06:58 PM diyintexas Building & Construction 1 09-30-2009 09:30 AM jambud Electrical 17 03-12-2008 09:31 AM

Top of Page | View New Posts