Tired of LOUSY service? Try Angie’s List.

Latest Members

Air Conditioning @hvacperformance

Video Categories

  1. Air Conditioners
  2. Boiler Videos
  3. Commercial HVAC
  4. Direct Digital Control
  5. Electrical Videos
  6. Gas Furnace Videos
  7. Heat Pump Videos
  8. HVAC Air Filter Videos
  9. HVAC Opinion Videos
  10. HVAC Shame Videos
  11. Thermostats
  12. Travel & Events
Local Guides
 All Guides  Alabama  Alaska  Arizona  Arkansas  California  Colorado  Connecticut  DC  Delaware  Florida  Georgia  Hawaii  Idaho  Illinois  Indiana  Iowa  Kansas  Kentucky  Louisiana  Maine  Maryland  Massachusetts  Michigan  Minnesota  Mississippi  Missouri  Montana  Nebraska  Nevada  New Hampshire  New Jersey  New Mexico  New York  North Carolina  North Dakota  Ohio  Oklahoma  Oregon  Pennsylvania  Rhode Island  South Carolina  South Dakota  Tennessee  Texas  Utah  Vermont  Virginia  Washington  West Virginia  Wisconsin  Wyoming
Tired of LOUSY service? Try Angie’s List.

Who's Online

We have 65 guests online

Main Menu

Tired of LOUSY service? Try Angie’s List.

Proper Humidity Levels

Having proper humidity levels in your home or business is important not only for your health but also in the amount of energy your HVAC systems use to keep you comfortable. If the humidity level in your home is high in the summer you will not feel cool. If the humidity level is low in the winter you will not feel warm when the thermostat is set at an average temperature. This will result in turning the HVAC thermostat up to compensate and you will use more energy to stay warm. A properly designed and installed system will keep the proper levels of humidity in your home or business and save you money on energy used by the HVAC System. For more information on humidity and the benefits of maintaining proper levels visit High Performance HVAC's Humidifier Page.

Before You Call

Before calling a heating and air conditioning company, check the following:
  • Check selections on thermostat. Ensure that it is set to the desired settings.
  • Check power supply. This can include a circuit breaker and or/a regular looking wall switch close to the indoor unit
  • Check for freezing up of units. If the unit is frozen turn it off. Check the filter(s) and supply vents to make sure they are not obstructed in any way. If you find no problems leave the unit turned off and call a service company.
Home Technical Information Boiler Piping Flow & Pipe Sizing
Boiler Piping Flow & Pipe Sizing
Written by Richard   

HVAC Hot Water Boiler Piping Flow Characteristics and Pipe Sizing

HVAC Boiler Boiler Piping Quickpage jump links:

Boiler Piping System Flow Rates

Piping in Hot Water Boiler Loops

Hot Water Pipe and Baseboard BTU Calculations

Boiler Pipe Sizing Related Links

High Performance HVAC Air Conditioning & Heating: Hot Water Boiler Piping

Hot Water Boiler Piping

HVAC Hot Water Boiler Piping Flow Characteristics and Pipe Sizing

Copper and Steel Pipe Flow Rates and Characteristics of Piping in Hot Water Boiler Loops

Hot water boiler pipe sizing is important and based on many factors including BTU and Delta T Calcualtions.

Flow Rates

Pipe Size

Flow Rate for Copper

Flow Rate for Steel

½”

1 ½ GPM (Gallons per Minute)

2 GPM (Gallons per Minute)

¾”

4 GPM (Gallons per Minute)

4 GPM (Gallons per Minute)

1”

8 GPM (Gallons per Minute)

8 GPM (Gallons per Minute)

1 ¼”

14 GPM (Gallons per Minute)

16 GPM (Gallons per Minute)

1 ½”

22 GPM (Gallons per Minute)

25 GPM (Gallons per Minute)

2”

45 GPM (Gallons per Minute)

50 GPM (Gallons per Minute)

2 ½”

85 GPM (Gallons per Minute)

80 GPM (Gallons per Minute)

3”

130 GPM (Gallons per Minute)

140 GPM (Gallons per Minute)

4”

300 GPM (Gallons per Minute)

Characteristics and Considerations of Piping in Hot Water Boiler Loops

Hot Water Boiler Piping, Boiler Pipe Sizing, BTU and Delta T CalculationsIt is important that the correct pump is selected in hot water boiler loops so that the correct velocity is achieved throughout the system. Too much velocity and the system will not be efficient because of laminar flow issues. Not enough velocity and the correct amount of BTU’s will not be delivered throughout the loops. Additionally, always consider expansion and contraction of piping in hot water boiler loops when installing piping.

To achieve calculated flow rate when sizing the pump use the following formula: Take the measurement of the longest run in the loop in feet and add 50% to that measurement. Multiply that number by .04 to get the pump head. The pump head refers to the capability of the pump to move the water through the loop and all the resistance in the loop or friction of the loop. Another method for determining pump head is to measure the longest pipe run in the loop and then adding the friction loss for each valve, elbow, and fitting. This requires the use of a chart which can be obtained from your HVAC circulator pump supplier.

Hot Water Pipe and Baseboard BTU Calculations

A BTU is measured by the amount of energy required to raise 1 Lb of water to 1° Fahrenheit. The weight of water is 8.33 lbs. Each individual room should be calculated for required amount of BTU’s to satisfy demand and then this number added together. For example: A house with a 100,000 BTU heat demand and a 30°ΔT will need a flow rate of approximately 7 G.P.M. (slightly less based on the following formula: (8.33 * 60 * 30°ΔT) = X. 100,000/X will give you 6.7 G.P.M. This means the minimum size needed to deliver the appropriate amount of BTU’s to satisfy demand will be 1 inch pipe.

High Performance HVAC Boiler Pipe Sizing Related Links

Boiler Page 1 | Boiler Page 2 | Boiler Expansion Tanks | Boiler Hot Water Loops | Boiler Maintenance | Boiler Pipe Sizing Top

Boiler Pipe Sizing, BTU and Delta T Calculations, pipe gpm

High Performance HVAC: Your Resource for good HVAC Advice!

Trackback(0)
Comments (0)Add Comment
feedSubscribe to this comment's feed

Write comment

busy
 
High Performance HVAC Air Conditioning and Heating