101006_euesco_ContractingFlyer_A4_final_low. Building performance, HVAC go hand-in-hand. When asked what is the best way to increase the efficiency of any HVAC installation, including hydronics, Dan DePontbriand, contractor at Mountain Air said, "Insulation and building sealing ... the challenge of heating efficiency is keeping the heat inside the building envelope once you've delivered it. " DePontbriand installs both hydronic and forced air systems and believes that there is no difference between the two when it comes to looking at the whole building as a system. Traditionally, air sealing, weatherization and insulation have been a separate industry from HVAC. But the fact is that no matter how efficient the equipment that a heating or air conditioning contractor installs, if the building doesn't perform right, it's the HVAC contractor that gets the return calls to fix the problem.
That's the case even when the problem is air leakage to the outdoors or lack of adequate insulation. How does a contractor get into the building performance business? Energy service company. An energy service company or energy savings company (acronym: ESCO or ESCo) is a commercial or non-profit business providing a broad range of energy solutions including designs and implementation of energy savings projects, retrofitting, energy conservation, energy infrastructure outsourcing, power generation and energy supply, and risk management.
A newer breed of ESCO evolving in the UK now focuses more on innovative financing methods. These include off-balance sheet vehicles which own a range of applicable equipment configured in such a way as to reduce the energy cost of a building. The building occupants, or landlord, then benefit from the energy savings and pay a fee to the ESCO SPV in return. At all times, the saving is guaranteed to exceed the fee. History[edit] The beginning[edit] The start of the energy savings business can be attributed to the energy crisis of the late 1970s, as entrepreneurs developed ways to combat the rise in energy costs. How it works[edit] U. ESCO 2.0[edit] Air conditioning ratings. Are ENERGY STAR air conditioners always the most efficient?
Most websites on air conditioning ratings will recommend you buy an ENERGY STAR rated air conditioner. These energy saving air conditioners will undoubtedly save you money compared to the cheapest, least efficient on the market (since the ENERGY STAR ones will be at least 10% more efficient). ENERGY STAR air conditioners will definitely be more efficient than anything more than 8 or 10 years old, because as mentioned in my overview article Energy saving air conditioners, efficiency requirements keep rising, and because old air conditioners can become less efficient with time.
But there can be a range of efficiencies within ENERGY STAR air conditioning ratings. For example, in the 5,000 to 5,999 BTU range, all room air conditioners currently manufactured need to have an Energy Efficiency Ratio (EER) of 9.7, while an ENERGY STAR unit needs to be at least 10% more efficient, with an EER of 10.7. For example, consider these two units:
Building Technologies Program: Building America. How We Help Homes & Buildings Save Energy The Building Technologies Office leads a network of research and industry partners to continually develop innovative, cost-effective energy-saving solutions for homes and buildings.
Value-Driven Applications Advanced energy efficiency technologies like lighting, HVAC, windows, appliances, and commercial equipment. Practical Standards Leading-edge appliance and equipment energy standards and improved building energy codes. Real World Solutions Holistic strategies for new construction and building upgrades that reduce energy bills, enhance comfort and productivity, and provide healthier indoor environments in new or existing homes and commercial buildings. Program Evaluation Program peer reviews are important in providing robust, documented feedback for program planning.