Amendment No.1

                 Amendment No. 1 dated as of November 10, 2000 (the "Amendment")
to the Stock Purchase Agreement dated as of September 18, 2000 (the "SPA") by
and between Alpha Technologies Group, Inc. ("Alpha") and Mestek, Inc.("Mestek").
Capitalized terms not otherwise defined herein shall have the meaning ascribed
to them in the SPA.
                                    Recitals
A.       Pursuant to the SPA, Mestek agreed to sell, and Alpha agreed to buy,
all of the common stock of National Northeast Corporation ("NNE") for a purchase
price of  $52,000,000.
B.    Alpha has deposited the Initial Payment of $500,000 with the Escrow Agent.
C.       The parties wish to amend the SPA as set forth below.
         NOW,  THEREFORE,  the parties  agree that the SPA is hereby  amended as
follows:

1.  Initial  Payment.  Section  2.2(b) of the SPA and  Section 2.1 of the Escrow
Agreement  are hereby  amended  to provide  that the  Initial  Payment  shall be
increased to one million  dollars  ($1,000,000).  Alpha shall wire transfer five
hundred thousand dollars ($500,000) to the Escrow Agent in immediately available
funds within one business day of the execution and delivery of this Amendment.
2. Purchase  Price.  Section 2.2(a) of the SPA is hereby amended to provide that
the Purchase  Price for all of the Shares of NNE shall be reduced by  $2,100,000
to  $49,900,000  and the Purchase  Price for eight  hundred  twenty (820) of the
Shares of NNE shall be forty four  million  four  hundred  seventy six  thousand
eighty four dollars ($44,476,084).  Alpha hereby agrees that it will not request
or receive any further Purchase Price reduction.
3. Conditions to Closing.  Sections  6.1(a)(ix) of the SPA is amended to provide
that it shall be a condition to Closing that all of Mestek's representatives and
warranties  be true and correct in all material  respects at Closing  unless the
failure of such  representations  and warranties to be true and correct does not
have a Material Adverse Effect.
1.  Supply of  Products  Following  Closing.  Section  8.10 of the SPA is hereby
amended to eliminate the  requirement  that Alpha cause NNE to sell any products
to Mestek at a  discount  or to pay  Mestek  any money for  Mestek's  failure to
purchase  any  products  from NNE at a discount in any period after the first 18
months following  Closing.  Accordingly,  the maximum discount and/or payment to
which Mestek shall be entitled under Section 8.10 of the SPA is $600,000.
2. Mutual Release of Claims. Mestek and Alpha hereby agree to release, discharge
and acquit each other and each other's  subsidiaries,  including their corporate
officers, directors, employees, agents and representatives,  of and from any and
all claims,  demands, sums of money, actions,  obligations and liabilities which
such  Releasor  now has  knowledge of each other for breach of the SPA as of the
date hereof.  This mutual  release shall be for the benefit of Mestek and Alpha,
their  assigns,  representatives  and  successors,  and shall be binding on each
party's  assigns,  representatives  and  successors.  The foregoing shall not be
construed as an admission of breach by either Mestek or Alpha.
3.       Material Adverse Change.  Alpha hereby agrees that the results of
operations of NNE through September 30, 2000 as disclosed to Alpha will not be
asserted as a Material Adverse Change
4.       No Other Amendments.  Other than as amended above, each provision of
the SPA shall remain in effect.



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                  In  WitnessWhereof,  the parties have signed this Amendment as
of the date set forth above.

                                ALPHA TECHNOLOGIES GROUP, INC.

                                By /S/ LAWRENCE BUTLER______
                                       Lawrence Butler



                                MESTEK, INC.

                                By__/S/ JOHN E. REED________
                                        John E. Reed