The London System:A Venomous h3 Move.

The bishop on h2 is extremely bad; after the 12th move, 6 of your pawns are on black squares, and the h2 bishop has no other function than to support the already overprotected e5 square - sounds like quite a waste. Besides, your plan gives black an outpost on e4, which eventually will be claimed by a knight.
To clarify, I don't know the London system very well, so maybe I'm missing something fundamental. But if I were black in that position, I would be extremely happy with the formerly strong f4 bishop now being reduced to a passive defender with barely any squares to move around, and my counter-plan would consist of organizing a counterplay on the queen side, eventually claiming the e4 square - the game is, at best, equal.
In your game, 17...Nd7? was your opponent's big mistake, it was overly passive and left the king undefended. 17...Ne4! would give advantage to black, and you would have a hard time tending to all the weaknesses your pawn march created.

You don't seem to know london system theory at all.In this opening,Ne4 is considered bad,after all Be4 de4 Nd2 and how would you expect him to protect his pawn.Your argument is logical,but It's theoretical background seems to be poor...
I do not like h3 move because it actually buries bishop on h2. In London System h3 is played when Black fianchettoes his dark-squared bishop or sometimes when you plays against the Dutch setup, so with h3 you have the idea of pushing g4 and opening g-file; otherwise, it is much wiser to 1) allow black to exchange dark-squared bishop on f4, and after f-pawn is doubled you have iron grip on e5 square and nice game 2) move your bishop to g3 when Black wants to exchange; you will get the open h-file for the rook, or if Black does not exchange bishops, you can plant your knight on e5, cement it with f4 and activate bishop via h4, where you actually play reversed Stonewall with bishop outside of pawn chain.

I have played these kind stonewall alike setups as White quite a few times and black is doing absolutely fine according to theory. If black plays Ne4 (Nd7 is a big mistake) and even plays f5 himself he is doing well and the bishop on h2 is really bad. I once lost an endgame with that bishop,that game i actually in The chessbase database,Crevatin-Buchert 0-1

I think the Bishop might be fine on f2, and I'd point my finger at the stonewall-esque f4 pawn move.
Looks to me like two crossed systems or something.

To Leo_C :You lost the game,and it is your mistake to do so.It is also due to your poor knowledge of opening theory.Anyway.Who could blame me for your loss?See some of my games in the london system and you will absorb ideas.

...and if the bishop is on that clumsy little f2,then how on earth will you play f5 and open that blocked rook?

You don't seem to know london system theory at all.In this opening,Ne4 is considered bad,after all Be4 de4 Nd2 and how would you expect him to protect his pawn.Your argument is logical,but It's theoretical background seems to be poor...
What do you mean "Ne4 is considered bad in this opening"? This isn't how openings work, it always depends on the specifics of the position.
Sample line: 17...Ne4 18. Bxe4 dxe4 19. Nd2 Ne7 20. Nxe4 Nf5, and black has a very solid compensation for the pawn. Engine gives -1 to this position, and I'm inclined to agree with it. After 21...Bxe5 and 22...Qc6 white will have to try really hard to avoid losing a piece, and in a few lines I've looked at, at best, white ends up a pawn down.
Friends,I would like to play the london system.In this forum,I am going to discuss systems with the move h3.And do not ever underestimate it's strength!It is more venomous than you think.I have played a few games with it and has found some new Ideas.