Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-03-2007, 09:52 AM   #1
Member
 
Join Date: Nov 2006
Posts: 291
Share |
Default

Sizing Supplemental Strip Heaters on HP System


What are the guidelines on the proper sizing of emergency/supplemental strip heaters on a new HP/Air Handler system?

Old HP is 4T and does a decent job down to mid 30's. Old Air Handler has 20KW worth of strip heating which actually seems like overkill when they kick in.

Manual Load J confirms that 4T is the right capacity system for my home and climate.

If I assume that the strip heating (ie in emergency mode) needs to completely heat the house in the event of a HP malfunction and that 4T (48,000 BTU) is the correct capacity then that suggests that strip heating needs to be about 15KW. (ie 48,000 BTU X KW/3414 BTU = 14KW).

Does this sound like the right approach??

hennyh is offline   Reply With Quote
Old 01-03-2007, 10:53 AM   #2
Thoroughbred Mopar Man
 
Join Date: Oct 2006
Location: South/East Kansas
Posts: 638
Default

Sizing Supplemental Strip Heaters on HP System


Hi hennyh

It looks like you have a good handle on the concept. I would go with the 15kw. This should be all that you need unless your area is subject to extreme cold for long periods. Then you would want the 20kw.

Good luck
Rusty

#CARRIERMAN is offline   Reply With Quote
Old 01-03-2007, 11:28 AM   #3
Member
 
Join Date: Dec 2006
Posts: 95
Default

Sizing Supplemental Strip Heaters on HP System


hennyh,

You are also limited by airflow CFM. If your HP/Air Handler is sized for a 4T coil then you are probably running about 1600 CFM max.

One of the other guys here should be able to specify the minimum CFM per 5KW strip.

If you plan on living in the house for many years and have chilly spots that insulation won't remedy, add a baseboard unit - go small - 750W.

...Christopher
Christopher is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Water Purification System - Maintenance Qs cjcocn Plumbing 1 11-18-2008 07:31 AM
Size A/C system properly 70stang HVAC 1 03-26-2006 07:22 PM
Replace furnace, coil and duct system sps123 HVAC 2 01-07-2006 10:56 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.