我让大狗×了两个小时视频

<code id="i5jc9"><nobr id="i5jc9"><track id="i5jc9"></track></nobr></code>

    <big id="i5jc9"></big>

        <code id="i5jc9"><small id="i5jc9"><track id="i5jc9"></track></small></code>

        <th id="i5jc9"><option id="i5jc9"></option></th>
      1. <strike id="i5jc9"></strike>

        <th id="i5jc9"></th>

        Commercial HVAC

        There are many types of commercial heating systems available. In general, heating systems are often packaged as a component of a commercial HVAC unit. HVAC stands for heating, ventilation and air conditioning; indeed, many commercial HVAC units are multi-function systems that can deliver all of the air quality control a business or building needs, whether large or small. However, there are also other heating choices that can offer excellent performance, efficiency and cost savings for commercial clients.

        Choosing a Wall Heater

        Wall heaters are what most people think of as traditional heaters. They attach directly to a wall and deliver heat by means of an electric coil. A blower sends the warmed air into the room via vents or slats. Wall heaters are a reasonably priced way to provide heat to smaller areas, such as a small office or workshop.

        Choosing a Radiant Heater

        Radiant heater systems are also commonly known as under-floor heating systems, though some radiant heat products transfer warmth from the walls or ceilings. Radiant systems can heat a large surface area – for example, the floor of a building – to a temperature that is considerably lower than that used in traditional heating systems. The operating principle is that when a larger surface area is heated, it does not need to be as hot in order to provide the same degree of heat transfer.

        Choosing High Efficiency Furnaces

        A high-efficiency furnace is an excellent choice for cost-effective heating. This type of furnace is generally a gas-powered furnace that has been specially designed to reduce operating costs, minimize heat wastage and conserve energy. High-efficiency furnaces achieve energy savings through a variety of innovations, including a condensing gas process which salvages exhaust heat. Variable-speed blowing and the use of a microprocessor that can carefully control furnace output are also among these innovative features.

        In combination with company-wide conservation policies, air curtains and window sealants and similar conservation-oriented steps, a high-efficiency furnace can save a business as much as 10 percent of its annual heating costs.

        When shopping for high-efficiency furnaces, both the Energy Star and Annual Fuel Utilization Efficiency (AFUE) ratings can help make the selection easier. AFUE ratings of 90 percent or higher designate a high-efficiency furnace, according to the Department of Energy. Furnaces with AFUE ratings of 78 percent or above are also good choices for energy conservation.


        我让大狗×了两个小时视频
        <code id="i5jc9"><nobr id="i5jc9"><track id="i5jc9"></track></nobr></code>

          <big id="i5jc9"></big>

              <code id="i5jc9"><small id="i5jc9"><track id="i5jc9"></track></small></code>

              <th id="i5jc9"><option id="i5jc9"></option></th>
            1. <strike id="i5jc9"></strike>

              <th id="i5jc9"></th>