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Tag Archives: Heating Capacity

  • How Energy Efficient Upgrades Impact your HVAC System

    Many homeowners and business owners have added energy efficient upgrades to reduce their environmental impact. Double-paned windows and high quality insulation can decrease the amount that owners spend on heating and cooling costs. These efforts are also more environmentally friendly because energy is not lost due to leaks. However, many owners don't take into consideration the impact that these improvement have on the HVAC system of the home or business.

    Energy efficient improvements change the heat load of the house. In fact, the US Department of Energy calculated how much the heat load of a 2000 square foot house in North Carolina would change with energy efficient improvements. The hypothetical house improved the insulation in the ceiling and walls, upgraded to double-paned glass, increased the window overhangs and eliminated duct leakage by moving the ducts into the conditioned space. Before the updates, the house's heat load would have been 46,100 Btu/hr by the Manual J calculation. After the updates, it would have been only 21,300 Btu/hr. The energy efficient upgrades cut the heat load in half!

    Unfortunately, many people don't realize the impact that this heat load reduction has on the HVAC system. In the original home, a 4 - 5 ton HVAC system would have been installed. This large HVAC system would have been appropriately sized for the home. However, HVACs are sized based on the heat load. Therefore, after improvements, the proper HVAC sizing would be 2 tons. If the HVAC system is not upgraded with the rest of the house, it will not be properly sized for maximum efficiency.

    The Department of Energy evaluated how much energy savings would result if the HVAC system was upgraded with the rest of the house. With a new 2 ton HVAC system, the homeowners would save 63 percent on heating energy and 53 percent on cooling energy. If the homeowners did the rest of the upgrades but did not upgrade the HVAC system, they would save 54 percent on heating and 47 percent on cooling. It does save energy to do the other upgrades, but homeowners that match the HVAC system to the current heat load gain an extra 10 percent increase in energy efficiency.

    Long lasting HVAC systems are often not included in home and business energy efficiency upgrades. However, they should be. As the heat load of the home or business changes, the HVAC system should be matched to the needs. A right-sized HVAC system could boost the energy efficiency of the home by 10 percent.

  • HVAC Tips to Keep a Two Story Home Warm

    HVAC Tips HVAC Tips

    What is the major challenge that homeowners face during the cold winter months? It is staying as warm as possible, right? Every person handles the coldness of the winter weather in a different way. The main objective, though, is to remain warm. When you go outdoors, you likely will have to wear the right clothing and shoes for the cold weather to protect yourself from ice, snow, wind, rain and the freezing temperatures.

    The Indoors

    With that being said, what do you do for the indoors when it is cold? Many homeowners don’t make the necessary preparation for the wintry weather. Yes, we are now going through the summer months, but that does not mean you shouldn’t prepare for the fall and the winter. In fact, there are many homeowners that are in the summer time frame and winter is the last thing on their minds as it relates to preparation. What if you live in a two story home? How do you prepare the upstairs area for the winter or even the summer?

    The Suggestions

    There are several reasons why you should maintain warmth in the upstairs area in a home with two stories. It can be quite a challenge, but here are a few proven suggestions below that you can consider.

    • Seal the home air tight
    • Make sure there is the right amount of insulation in the home
    • Adjust your thermostat
    • On the warmer side of the house, open up the blinds
    • Open up the vents and make sure there is no blockage

    The Right Insulation

    When it comes to insulation, you should be aware how important it is in keeping your house warm. It is even more important for two story homes. While downstairs may be warm, you still want to make sure that the upstairs is as well. The level and the kind of insulation you use must be enough for the area where you live. For example, if you live in a warm climate such as Florida, you may want to have an HVAC technician check to see what kind of insulation you need.

    Air Tight Seal

    When winter arrives, there are many homes that have cold air escaping in different areas of the home. This cold air will typically come in through doors and windows that are not properly sealed. You will find out sooner enough how detrimental this is to your energy saving efforts.

    Thermostat Adjustment

    One of the main reasons that the upstairs of a two story home is so difficult to maintain its warmth is failure of homeowners to adjust the thermostat. However, make sure that the thermostat is adjusted once individuals go upstairs and not before. Lower the temperature when no one is upstairs.

    Conclusion

    If you need heating assistance before the winter months come around, solicit help from a HVAC contractor that specializes in heating and air conditioning, but also expertise in two story homes. If you want to be comfortable during the next winter months, make sure you get this done right now, regardless if it is summer or even fall.

    Image credit: https://www.flickr.com/photos/rschnaible/13891110910/

  • Home Heating Pump: Determining the Heating Capacity

    Home Heating Pump

    There are many factors to consider when thinking about purchasing a new heating pump for heating and cooling the home. Because the system works by moving air from a warm area to a cool one like a refrigerator instead of generating the heat, the operating cost is approximately a quarter the cost of other heating and cooling systems. With the way the heat pump is built to operate in a highly efficient manner, it allows 4x the energy it uses. They’re an excellent choice for climates that don’t have sub-zero temperatures. A properly sized heating pump can trim electric usage by 30-40%. It’ll also dehumidify better than other types, resulting in less energy usage and cooler comfort during the summer. They do require larger duct work than other heating systems and should be sealed for efficient operation.

    Sizing of a heat pump unit should start by figuring the required cooling capacity, and then figure the heating capacity of the selected heat pump. It’s rated by a standard outside temperature of 47 degrees because the unit is placed outdoors and exposed to different temperatures. The design and size must meet the temperature levels of the locality of the pump placement. Heat loss must be factored in the equation for sizing capacity because the unit must produce enough heat to make up for the loss through windows, walls, and ceilings to keep the home comfortable during the winter months. As the temperature gets colder, a supplemental heating element takes the heating capacity back to where it maintains sufficient heat output for warmth comfort.

    Once the decision is made to purchase a heating pump heating and cooling system, the consumer should calculate the size necessary to heat and cool the home efficiently before contacting various companies for pricing. For example, a 2400 square foot home would need approximately a five ton system. A ton is equal to 12,000 BTU, and one ton is recommended for 500 square feet of heating. These are rough estimates only but proper sizing techniques are recommended. Knowing some basic facts will be an asset when talking to dealers.

    To assist in determining the right size, the most recent version of the ACCA Manuals J and S should be used for the calculations of the unit. There are built-in safety factors to accommodate most needs. When the window dressing is unknown, they should be factored in place or the calculation will be overestimated. The temperatures of the area shouldn’t be altered because it would lead to over-sizing. Many companies estimate up when figuring the calculation capacity of the unit because they believe more is better. The recommended temperature for cooling is 70 degrees and 75 degrees for heating. Right-sizing of a heat pump provides a 10% bonus energy savings.

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