Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
I like the attached spread sheet. It does not rely on a website and allows you to adjust more variables. Natural gas for example is has a lower energy value at altitude you need to be able to change the value."If you can't explain it simply, you don't understand it well enough"
thanks for the input. I still need some formula for the cost of a CFM
of air at the various ambient temp and temp rise and temp drop at the various rates?? thanks again0
At normal room temperatures the heat capacity of air is approximately 0.24 BTU/lb F. The density is about .00234 slugs/cuft. Given those two numbers you can easily compute the required heating rate -- in, say, BTUh -- for any delta T (in Fahrenheit) and air flow rate in, say, CFM.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0
- 121.3K All Categories
- 84K THE MAIN WALL
- 2.9K A-C, Heat Pumps & Refrigeration
- 53 Biomass
- 417 Carbon Monoxide Awareness
- 40 Chimneys & Flues
- 1.7K Domestic Hot Water
- 4.7K Gas Heating
- 119 Geothermal
- 155 Indoor-Air Quality
- 3K Oil Heating
- 56 Pipe Deterioration
- 771 Plumbing
- 5.4K Radiant Heating
- 362 Solar
- 14K Strictly Steam
- 3K Thermostats and Controls
- 51 Water Quality
- 625 Buy, Sell, Barter
- 38 Industry Classes
- 73 Job Opportunities
- 17 Recall Announcements