EXHIBIT 99.1

HETSCO HOLDINGS, INC. AND SUBSIDIARY

Greenwood, Indiana

CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

Contents

INDEPENDENT AUDITOR’S REPORT

To the Board of Directors and Shareholders

Hetsco Holdings, Inc. and Subsidiary

Greenwood, Indiana

Report on the Consolidated Financial Statements

We have audited the accompanying consolidated financial statements of Hetsco Holdings, Inc. and subsidiary, which comprise the consolidated balance sheet as of December 31, 2012, and the related consolidated statements of income, changes in shareholders’ equity, and cash flows for the year then ended, and the related notes to the consolidated financial statements.

Management’s Responsibility for the Financial Statements

Management is responsible for the preparation and fair presentation of these consolidated financial statements in accordance with accounting principles generally accepted in the United States of America; this includes the design, implementation, and maintenance of internal control relevant to the preparation and fair presentation of consolidated financial statements that are free from material misstatement, whether due to fraud or error.

Auditor’s Responsibility

Our responsibility is to express an opinion on these consolidated financial statements based on our audit. We conducted our audit in accordance with auditing standards generally accepted in the United States of America. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free from material misstatement.

An audit involves performing procedures to obtain audit evidence about the amounts and disclosures in the consolidated financial statements. The procedures selected depend on the auditor’s judgment, including the assessment of the risks of material misstatement of the consolidated financial statements, whether due to fraud or error. In making those risk assessments, the auditor considers internal control relevant to the entity’s preparation and fair presentation of the consolidated financial statements in order to design audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the entity’s internal control. Accordingly, we express no such opinion. An audit also includes evaluating the appropriateness of accounting policies used and the reasonableness of significant accounting estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements.

We believe that the audit evidence we have obtained is sufficient and appropriate to provide a basis for our audit opinion.

Opinion

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of Hetsco Holdings, Inc. and subsidiary as of December 31, 2012, and the results of its operations and its cash flows for the year then ended in accordance with accounting principles generally accepted in the United States of America.

Indianapolis, Indiana

July 16, 2013

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEET

December 31, 2012

See accompanying notes to consolidated financial statements.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENT OF INCOME

Year ended December 31, 2012

See accompanying notes to consolidated financial statements.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

Year ended December 31, 2012

See accompanying notes to consolidated financial statements.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENT OF CASH FLOWS

Year ended December 31, 2012

See accompanying notes to consolidated financial statements.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 1—ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Business Activity: Hetsco Holdings, Inc. and its wholly-owned subsidiary (the “Company”) is a leading independent provider of field repair for brazed aluminum plate-fin heat exchangers, specialized welding/maintenance and safety services for industrial gas processing, chemical and power generation facilities. The Company provides its services on a global basis to the world’s largest industrial gas and petrochemical companies. The Company also offers process equipment fabrication and provides its customers with construction and relocation services for industrial air separation facilities. Additionally, the Company provides safety, oversight and confined space monitoring, as well as inspection and testing of cryogenic process equipment.

Basis of Presentation and Principles of Consolidation: On April 30, 2013, Global Power Equipment Group (a publicly traded company) entered into a Stock Purchase Agreement to acquire the issued and outstanding shares of capital stock of the Company. The consolidated financial statements were not previously filed with the Securities and Exchange Commission (“SEC”) and have been prepared for the purpose of complying with Rule 3-05 of Regulation S-X of the SEC. The consolidated financial statements include the accounts of Hetsco Holdings, Inc. and its wholly owned subsidiary, Hetsco, Inc. All material intercompany accounts and transactions have been eliminated in consolidation.

Credit Risk Concentration: The Company grants unsecured credit to its customers throughout the world. At December 31, 2012, three customers, Air Products, Praxair and Westlake Chemical accounted for 61% of sales and four customers, Air Products, Praxair, Exxon Mobil and Westlake Chemical, accounted for 76% of accounts receivable.

Occasionally, the Company has deposits at a financial institution in amounts that may be in excess of federally insured limits.

Receivables and Credit Policies: Accounts receivable are uncollateralized customer obligations due under normal trade terms requiring payment within 15 to 90 days from the invoice date.

Accounts receivable are stated at the amount billed to the customer. Customer account balances with invoices dated over 90 days old are considered delinquent.

Payments of accounts receivable are allocated to the specific invoices identified on the customer’s remittance advice or, if unspecified, are applied to the earliest unpaid invoices.

Trade accounts receivable are stated at the amount management expects to collect from outstanding balances. The carrying amounts of accounts receivable are reduced by a valuation allowance that reflects management’s best estimate of the amounts that will not be collected. Management individually reviews all accounts receivable balances that exceed 90 days from the invoice date and based on an assessment of current creditworthiness, estimates the portion, if any, of the balance that will not be collected. Management provides for probable uncollectible amounts through a charge to earnings and a credit to a valuation allowance based on its assessment of the current status of individual accounts. Balances which are still outstanding after management has used reasonable collection efforts are written off through a charge to the valuation allowance and a credit to trade accounts receivable. Management has not recorded an allowance for doubtful accounts at December 31, 2012, as they believe all amounts to be collectible or potential losses are immaterial.

Inventories: Inventories that consist of aluminum and stainless steel fittings and rolled shells are stated at the lower of average cost, determined on the first-in, first-out (FIFO) method, or market.

Revenue and Cost Recognition: Revenue on short term and long term contracts are recognized on the percentage of completion basis, measured by the cost to cost method. This method is used because management considers contract costs to be the best available estimate of progress on these contracts. Because of the inherent uncertainties in estimating cost and final contract revenue being subject to customer approval, it is at least reasonably possible that the Company’s estimates of cost and revenue may significantly change in the near term. The majority of contracts are short-term.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 1—ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Continued)

Contract costs include all direct material and labor costs. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. Changes in job performance, job conditions, and estimated profitability are recognized in the period in which the revisions are determined.

Property and Equipment: Property and equipment are recorded on the basis of cost and include expenditures for new assets and expenditures that substantially increase the useful lives of existing assets. Expenditures in the nature of normal repair and maintenance are charged to operations as incurred.

Property and equipment consists of the following:

The following property and equipment included above pertain to capital leases:

Depreciation expense was $170,705 for the year ended December 31, 2012 and is included in general and administrative expenses. Depreciation of property and equipment is provided by the straight-line method over their applicable estimated useful lives, ranging from two to ten years.

Fair Value of Financial Instruments: Fair values of cash, accounts receivable and accounts payable approximate the carrying value recorded in the accompanying balance sheets due to the short maturity of these financial instruments. The carrying amount of debt approximates fair value due to either length of maturity or existence of interest rates that approximate prevailing rates. The Company’s interest rate swap agreement is reported at fair value.

The Company determines the fair market values of its derivative contracts based on the fair value hierarchy established in GAAP, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from sources independent of the reporting entity. Unobservable inputs are inputs that reflect the Company’s own assumptions based on market data and on assumptions that market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. GAAP describes three Levels within its hierarchy that may be used to measure fair value:

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 1—ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Continued)

In many cases, a valuation technique used to measure fair value includes inputs from multiple levels of the fair value hierarchy. The lowest level of significant input determines the placement of the entire fair value measurement in the hierarchy. The fair value of the Company’s derivative are based upon valuation models using observable market data as of the measurement date (Level 2).

Income Taxes: The provision for income taxes is based on income recognized for financial statement purposes and includes the effects of temporary differences between such income and that recognized for tax return purposes. The Company files a United States federal income tax return. The Company accounts for its income taxes based on the amount of taxes due on its tax returns plus deferred taxes computed based on the expected future tax consequences of temporary differences between the carrying amounts and tax bases of assets and liabilities, using enacted tax rates. A valuation allowance, if any, adjusts net deferred tax assets to the amount that is more likely than not to be realized.

The Company follows guidance issued by the FASB with respect to accounting for uncertainty in income taxes. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded.

The Company records unrecognized tax liability, interest, and penalties related to income tax matters in income tax expense. A reconciliation of the unrecognized tax liability, including penalties and interest, is as follows:

The combined amount of accrued interest and penalties related to income tax positions taken and included in accrued expenses and other liabilities at December 31, 2012 was $643. For the year ended December 31, 2012, interest and penalties recorded in income tax expense totaled $643.

The Company is subject to U.S. federal income tax as well as income tax of multiple-state jurisdictions. The Company is no longer subject to examination by U.S. federal taxing authorities for the years before 2009 and for all material state income through 2008. It is reasonably possible that the amount of the unrecognized benefits with respect to the Company’s unrecognized tax positions will increase or decrease in the next 12 months. These changes may be the result of, among other things, state tax settlements under voluntary disclosure agreements.

Financing Fees: Costs incurred in connection with obtaining financing have been capitalized. Deferred costs related to the revolving line of credit are being amortized using the straight-line method over the five year life of the loan. Deferred costs related to the term note are being amortized using the interest method over the five-year life of the loan. The related amortization expense is included in interest expense. Amortization expense was $22,934 for the year ending December 31, 2012 and is recorded as interest expense.

Advertising: The Company follows the policy of charging the costs of advertising to expense as incurred. Advertising expense for the year ended December 31, 2012 was $6,972.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 1—ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Continued)

Goodwill: Goodwill results from prior business acquisitions and represents the excess of the purchase price over the fair value of acquired tangible assets and liabilities and identifiable intangible assets. The Company determined that it is more likely than not that the fair value exceeded its carrying value. Accordingly, no impairment was noted for the year ended December 31, 2012.

Intangible Assets: The Company will not amortize certain intangible assets with indefinite lives but will review them for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying values may not be recoverable. Trade name is deemed to have an indefinite life. During 2012, the Company adopted revised guidance related to testing indefinite lived intangible assets for impairment. Based on this adoption, the Company determined that it is more likely than not that the fair value exceeded its carrying value. Accordingly, no impairment was noted for the year ended December 31, 2012. Definite-lived intangibles are amortized using the straight-line method over 20 years for customer relationships and four years for covenant not to compete.

Amortization expense totaled $139,675 for the year ending December 31, 2012. The amortization expense requirement for the next five years is as follows:

Intangible assets are as follows:

Use of Estimates: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could vary from the estimates that were used. Significant estimates, such as determining the recognition of gross profit under the percentage of completion method of accounting for contracts and the impairment evaluations for goodwill and intangible assets, are particularly subject to change in the near term.

Presentation of Sales Tax: The Company does business in various states throughout the country. Some of those states impose a sales tax on all of the Company’s sales to non-exempt customers. The Company collects that sales tax from customers and remits the entire amount to the respective states. The Company’s accounting policy is to exclude the tax collected and remitted to the states from revenue and cost of sales.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 1—ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Continued)

Stock-Based Compensation Expense: We measure and recognize stock-based compensation expense based on estimated fair values of the stock awards on the date of grant. Vesting of stock awards is based on certain performance and service conditions over a five year period. For all awards with graded vesting, we record compensation expense for the entire award on a graded-vesting basis over the requisite service period, net of forfeitures. Stock-based compensation expense is included in general and administrative expenses in the accompanying consolidated statement of income.

We estimate expected forfeitures of stock-based awards at the grant date and recognize compensation cost only for those awards expected to vest. We estimate our forfeiture rate based on several factors including historical forfeiture activity, expected future employee turnover, and other qualitative factors. We ultimately adjust this forfeiture assumption to actual forfeitures.

Subsequent Events: The Company evaluated subsequent events through July 16, 2013, the date the financial statements were available to be issued.

NOTE 2—LINE OF CREDIT

The Company has a revolving line of credit, as amended on December 20, 2012, with a financial institution for the principal sum of up to $4,500,000. The line is limited to 85% of eligible accounts receivable, 70% of unbilled accounts receivable, and 50% of inventory. The loan is secured by all assets of the Company. Interest accrues on the principal sum at a rate per annum equal to the financial institution’s Index Rate plus the applicable margin ranging from 0.50% per annum to 2.0% per annum. The interest rate at December 31, 2012 was 4.75%. The note matures April 30, 2014. The Company had used $500,813 of the line of credit at December 31, 2012. The Company is required to maintain a lock-box arrangement with the bank whereby remittances from the Company’s customers are used to reduce the outstanding revolver balance. In addition, the line of credit agreement contains subjective acceleration provisions. As a result, the revolver balance has been classified as current.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 3—LONG-TERM DEBT AND CAPITAL LEASES

Long-term debt consisted of the following at December 31, 2012:

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 3—LONG-TERM DEBT AND CAPITAL LEASES (Continued)

Maturities of long-term debt, including capital leases, are as follows:

The line of credit and term note agreement required the Company to meet certain negative covenants prohibiting or restricting certain transactions and various positive covenants related to certain financial ratios. At December 31, 2012, the Company was in compliance with all of its covenants.

The line of credit, term note and notes payable were paid in full on April 30, 2013 in connection with the sale of the Company. The long-term debt has been classified in the balance sheet based on its original maturity schedule.

Future minimum payments, by year and in aggregate, for the capital leases that are in the table above are as follows:

NOTE 4—INTEREST RATE SWAP AGREEMENT

At December 31, 2012, the Company had one interest rate swap agreement that was determined to be significant and was in place to reduce the future impact of changes in interest rates on its variable rate long-term debt. The swap agreement is a contract to exchange the debt obligation’s variable rate interest payments for fixed rate interest payments. The notional amount of the interest rate swap agreement is used to measure interest to be charged and does not represent the amount of exposure of credit loss, but rather the amount exchanged is determined by reference to the notional amount and the other terms of the interest rate swap. The interest charged under the interest rate swap agreement was recognized as an adjustment to interest expense. During the year ended December 31, 2012, the Company recorded $30,245 in interest expense related to this agreement.

The agreement carries a notional amount of $1,500,000, and matures on January 1, 2014. The Company will pay a fixed rate of 2.11% and will receive a floating rate based upon three month LIBOR. The Company’s interest rate swap agreement did not meet all of the required criteria to be designated as a cash flow hedge. As a result, the change in the estimated fair value liability as of December 31, 2012 was recognized as an unrealized loss in the accompanying statements of income and cash flows. Additionally, at December 31, 2012, the Company recorded the fair value of the interest rate swap agreement of $30,976 in long-term liabilities on the accompanying balance sheet. The interest rate swap agreement was settled on April 30, 2013 in connection with the sale of the Company.

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 5—STOCKHOLDERS’ EQUITY

Preferred Stock: The Company had authorized 1,500 shares of preferred stock. Each share of preferred stock had a liquidation preference of $7,375 per share and accrued dividends at an annual rate of $590 per share. Dividends on preferred stock were payable at the discretion of the Company in cash or preferred stock. The preferred stock was (i) not convertible, (ii) not redeemable and (iii) had voting rights equivalent to one share of common stock.

Restricted Stock Agreements: Total stock-based compensation expense during the year ended December 31, 2012 was $3,048. As of December 31, 2012, total unrecognized compensation expense related to all unvested restricted stock awards totaled $2,074, which is expected to be recognized over a weighted-average period of 1.40 years. The following table summarized our unvested restricted stock award activity during the year ended December 31, 2012:

NOTE 6—RETIREMENT PLAN

The Company has adopted a profit sharing plan that includes a 401(k) option for all full-time employees who have attained the age of 21 and completed one year of service. The plan provides that the Company may make discretionary contributions to the plan. The plan is currently funded.

The expense under the profit sharing plan totaled $209,703 for the year ending December 31, 2012.

NOTE 7—OPERATING LEASES

The Company leases its facilities under separate non-cancelable operating leases. Total lease expense for the year ending December 31, 2012 was $345,497.

Minimum future lease commitments under non-cancelable operating leases are as follows:

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 8—RELATED PARTY TRANSACTIONS

PRV Management, L.P. (PRV) and its affiliates own 98.7% of the Company. The Company is under contractual agreement with PRV to provide monitoring services to the Company. The agreement dated September 3, 2008 calls for an aggregate annual monitoring fee of $150,000 per year, plus out of pocket expenses, payable in equal quarterly installments. The agreement is in effect until the earlier of the twelfth anniversary date of the effective date, the date on which PRV and its affiliates own less than 10% of the number of shares of common stock of the Company, the date of a qualified initial public offering, and such earlier date as mutually agreed by the Company and PRV. The Company incurred $162,738 in monitoring fees, plus out of pocket expenses, for the year ending December 31, 2012. The agreement was canceled on April 30, 2013 in connection with the sale of the Company.

During 2012, the Company was under contractual agreement with an affiliate to provide monitoring services to the Company for a fee totaling $125,000.

On December 20, 2012, the Company distributed $5,500,000 to the owners of the Company.

NOTE 9—INCOME TAXES

Income tax expense consists of the following for the year ending December 31, 2012:

The tax effects of temporary differences which give rise to deferred tax assets (liabilities) at December 31, 2012 are as follows:

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HETSCO HOLDINGS, INC. AND SUBSIDIARY

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

December 31, 2012

NOTE 9—INCOME TAXES (Continued)

The amount of the income tax provision during the year ended December 31, 2012 differs from the statutory federal income tax rate of 34% as follows:

NOTE 10—CONTRACTS IN PROCESS

Contracts in process at December 31, 2012 reflected in the financial statements are as follows:

NOTE 11—SUBSEQUENT EVENT

On April 30, 2013, the Company was purchased for $33.3 million in cash, subject to certain adjustments as provided for in the purchase agreement.

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