Market assessment for gas fired rooftop units
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Market Assessment for Gas-fired Rooftop Units Eileen Eaton June Meeting 2007 Overview Market Background for Rooftop Units Major Manufacturers Typical Unit Characteristics Size Distribution Common Use Buildings Market Segmentation High-efficiency Units Product Offerings Product Cost

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Market Assessment for Gas-fired Rooftop Units

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Market Assessment for Gas-fired Rooftop Units

Eileen Eaton

June Meeting 2007


Overview

  • Market Background for Rooftop Units

    • Major Manufacturers

    • Typical Unit Characteristics

    • Size Distribution

    • Common Use Buildings

    • Market Segmentation

  • High-efficiency Units

    • Product Offerings

    • Product Cost

    • Market Barriers

    • Market Requirements

    • Energy Savings Opportunities

    • Energy Savings Potential


Market Background

  • Packaged systems are used in two-thirds of all commercial floor space in the United States.

    • They are popular due to their low first cost and simple design.

  • Rooftop units account for 60% of cooling energy and nearly one-third of total heating and cooling energy in small and medium size, low-rise buildings.


Major Manufacturers

  • The major manufacturers of unitary air-conditioners are:


Typical Unit Characteristics

  • Common capacities of commercial packaged units range from 65,000 Btu/h - 240,000 Btu/h.

  • The market is dominated by small systems (<10 tons), representing almost 60% of the total installed DX cooling capacity.

  • The most popular unit size is 5 tons (in terms of units sold).


Size Distribution


Common Use Buildings

  • Packaged rooftop units dominate the market for small and medium size, low-rise buildings.

  • Facilities that use commercial rooftop air conditioners include:

    • Small office buildings

    • Clinics and medical care facilities

    • Hotels

    • College dormitories

    • Military barracks

    • Retail stores

    • Schools and universities

    • Prisons

    • Warehouses

    • Laboratory and light industrial buildings


Market Segmentation

  • ≤ 5.5 tons – SEER

  • > 5.5 tons – EER

  • Off-the-shelf and semi-custom units

    • ≤ 20 tons

  • Custom built units

    • ≥ 20 tons

  • New construction

  • Renovation


High-efficiency Product Offerings

  • A few of the large manufacturers either have the equipment or can add a high-efficiency furnace on a custom basis.

  • A high-efficiency gas pack with a variable speed fan and efficiencies up to 96% is available for units ≤ 6 tons.

  • Models are available with an option of a modulating gas heater and depending on the manufacturer for 35-50 ton units or 20-130 ton units.

  • One manufacturer makes pulse combustion heaters on a custom basis.


High-efficiency Product Costs

  • A 20-ton rooftop with a modulating furnace costs $8,000-9,000 more than a 2-stage gas heating furnace.

  • A 50-ton rooftop with a modulating furnace costs $9,000-10,000 more.

  • The units have additional features besides a modulation furnace, which tend to increase their cost.


Market Barriers for High-efficiency Units

  • Lack of Demand

  • First Cost

    • It is often difficult to sell higher priced energy efficient products in an environment where buyers select equipment based on first cost

  • Maintenance

    • An HVAC unit’s location on the roof can affect its operating efficiency, reliability and serviceability

    • Condensing units have problems with the condensate freezing in cold weather climates

  • Few manufacturers are making high-efficiency products


Market Requirements for High-efficiency Units

  • High-efficiency Products need to be:

    • Competitive on a first cost basis

    • Have low maintenance requirements

    • When maintenance is required, easy to service

  • Efficiency programs can play a significant role in reducing first cost of innovative products


Energy Savings Opportunities

  • Smaller units (< 10 tons)

    • 60% of cooling capacity

    • Mass produced

  • Larger units (> 20 tons)

    • Generally less efficient

    • Custom built

    • Fewer target customers

  • High-use buildings – medium energy usage (85 to 115 kBtu/sqft/year) and represent a large amount of floorspace.

    • Offices

    • Mercantile & Service

    • Public Buildings

  • New Construction


Energy Savings Potential

  • High-efficiency units can yield up to 16% energy savings for a 10-ton unit

  • Available Technologies:

    • Gas Modulating

      • Savings in fan power and gas

        for heating

      • Cost premium

    • Condensing

      • Recovers waste heat from the

        exhaust gases

      • Pulse Combustion - low standby

        losses and combustion air fan energy consumption is virtually eliminated


Questions?

Eileen Eaton

617-589-3949 x 203

Eeaton@cee1.org

Kara Rodgers

617-589-3949 x 202

Krodgers@cee1.org

Michelle Rosier

617-589-3949 x 232

Mrosier@cee1.org


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